ICOM IC-M423, IC-M423G, IC-M423GE, IC-M424, IC-M424G INSTRUCTION MANUAL

Page 1

INSTRUCTION MANUAL

VHF MARINE TRANSCEIVERS

|M423 |M423G |M423GE |M424 |M424G

This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference.

IC-M423G

Page 2

PREFACE

IMPORTANT

Thank you for choosing this Icom product. This product is designed and built with Icom’s state of the art technology and craftsmanship. With proper care, this product should provide you with years of trouble-free operation.

D FEATURES

❍ Simple operation with large keys ❍ Easy to hear speaker ❍ Built-in DSC meets ITU Class D requirement ❍ Rugged waterproof construction ❍ Optional COMMANDMIC ❍ Easy to make an individual DSC calls using the optional

Class B AIS Transponder

❍ Built-in GPS (For only the IC-M423G and IC-M424G) ❍ Built-in GPS receiver with a supplied GPS antenna

(For only the IC-M423GE)

CLEAN THE TRANSCEIVER AND MICROPHONE THOROUGHLY WITH FRESH WATER after exposure to saltwa-

ter, and dry it before operating. Otherwise, the transceiver’s keys, switches and controllers may become unusable, due to salt crystallization.

NOTE: If the transceiver’s waterproof protection appears defective, carefully clean it with a soft, damp (fresh water) cloth, then, dry it before operating. The transceiver may lose its waterproof protection if the case or connector cover is cracked or broken, or the transceiver has been dropped.

™ (HM-195)

READ ALL INSTRUCTIONS carefully and completely

before using the transceiver.

SAVE THIS INSTRUCTION MANUAL — This in-

struction manual contains important operating instructions for the transceiver.

EXPLICIT DEFINITIONS

WORD DEFINITION

RWARNING!

CAUTION

NOTE

Icom is not responsible for the destruction or damage to the Icom transceiver, if the malfunction is because of:

• Force majeure, including, but not limited to, ﬁres, earthquakes, storms, ﬂoods, lightnings, or other natural disasters, disturbances, riots, war, or radioactive contamination.

• The use of Icom transceiver with any equipment that is not manufactured or approved by Icom.

Personal injury, fire hazard or electric shock may occur.

Equipment damage may occur. If disregarded, inconvenience only. No risk

of personal injury, ﬁre or electric shock.

Page 3

IN CASE OF EMERGENCY

INSTALLATION NOTE

If your vessel requires assistance, contact other vessels and the Coast Guard by sending a Distress call on Channel 16.

USING CHANNEL 16

DISTRESS CALL PROCEDURE

1. “MAYDAY MAYDAY MAYDAY.”

2. “THIS IS ...............” (name of vessel).

3. Say your call sign or other description of the vessel (AND 9 digit DSC ID if you have one).

4. “LOCATED AT ...............” (your position).

5. State the nature of the distress and assistance required.

6. Give any other information which might facilitate the rescue.

Or, make your Distress call using digital selective calling on Channel 70.

USING DIGITAL SELECTIVE CALLING (Ch 70)

DISTRESS CALL PROCEDURE

1. While lifting up the key cover, hold down [DISTRESS] for 3 seconds until you hear 3 short beeps and then one long beep.

2. Wait for an acknowledgment on Channel 70 from a coast station.

• After the acknowledgement is received, Channel 16 is auto-

matically selected.

3. Hold down [PTT], then transmit the appropriate information as listed above.

Installation:

The installation of this equipment should be made in such a manner as to respect the EC recommended electromagnetic ﬁeld exposure limits. (1999/519/EC)

The maximum RF power available from this device is 25 watts. The antenna should be installed as high as possible for maximum efﬁciency and the installation height should be at least 1.4 meters above any accessible position. In the case where an antenna cannot be installed at a reasonable height, then the transmitter should neither be continuously operated for long periods if any person is within a distance of 1.4 meters of the antenna, nor operated at all if any person is touching the antenna.

It is recommended that antenna of a maximum gain of 3 dB are used. If higher gain antenna are required then please contact your Icom distributor for revised installation recommendations.

Operation:

The exposure to RF electromagnetic ﬁeld is only applicable when this device is transmitting. This exposure is naturally reduced due to the nature of alternating periods of receiving and transmitting. Keep your transmissions to the minimum necessary.

Icom, Icom Inc. and Icom logo are registered trademarks of Icom Incorporated (Japan) in Japan, the United States, the United Kingdom, Germany, France, Spain, Russia, Australia, New Zealand, and/or other countries. COMMANDMIC is a registered trademark of Icom Incorporated (Japan) in Japan and the United States.

Page 4

RADIO OPERATOR WARNING

Icom requires the radio operator to meet the

FCC Requirements for Radio Frequency Exposure. An omnidirectional antenna with gain not

WARNING

deck and all possible personnel. This is the minimum safe separation distance estimated to meet all RF exposure compliance requirements. This 5 meter distance is based on the FCC Safe Maximum Permissible Exposure (MPE) distance of 3 meters added to the height of an adult (2 meters) and is appropriate for all vessels.

For watercraft without suitable structures, the antenna must be mounted so as to maintain a minimum of 1 meter vertically between the antenna, (measured from the lowest point of the antenna), to the heads of all persons AND all persons must stay outside of the 3 meter MPE radius.

Do not transmit with radio and antenna when persons are within the MPE radius of the antenna, unless such persons (such as driver or radio operator) are shielded from antenna ﬁeld by a grounded metallic barrier. The MPE Radius is the minimum distance from the antenna axis that person should maintain in order to avoid RF exposure higher than the allowable MPE level set by FCC.

greater than 9 dBi must be mounted a minimum of 5 meters (measured from the lowest point of the antenna) vertically above the main

FAILURE TO OBSERVE THESE LIMITS MAY ALLOW THOSE WITHIN THE MPE RADIUS TO EXPERIENCE RF RADIATION ABSORPTION WHICH EXCEEDS THE FCC MAXIMUM PERMISSIBLE EXPOSURE (MPE) LIMIT. IT IS THE RESPONSIBILITY OF THE RADIO OPERATOR TO ENSURE THAT THE MAXIMUM PERMISSIBLE EXPOSURE LIMITS ARE OBSERVED AT ALL TIMES DURING RADIO TRANSMISSION. THE RADIO OPERATOR IS TO ENSURE THAT NO BYSTANDERS COME WITHIN THE RADIUS OF THE MAXIMUM PERMISSIBLE EXPOSURE LIMITS.

Determining MPE Radius THE MAXIMUM PERMISSIBLE EXPOSURE (MPE) RADIUS HAS BEEN ESTIMATED TO BE A RADIUS OF ABOUT 3 M PER OET BULLETIN 65 OF THE FCC. THIS ESTIMATE IS MADE ASSUMING THE MAXIMUM POWER OF THE RADIO AND ANTENNAS WITH A MAXIMUM GAIN OF 9 dBi ARE USED FOR A SHIP MOUNTED SYSTEM.

iii

Page 5

AVERTISSEMENT POUR LES OPÉRATEURS RADIO

AVERTISSEMENT

ment au-dessus du pont principal et de tout le personnel qui peut s’y trouver. Il s’agit de la distance de sécurité minimale prévue pour satisfaire aux exigences de conformité en matière d’exposition aux RF. Cette distance de 5 mètres est établie en fonction de l’exposition maximale admissible sécuritaire de 3 mètres établie par la FCC, à laquelle on ajoute la hauteur d’un adulte (2 mètres); cette distance convient pour tous les navires.

Dans le cas des embarcations sans structure convenable, l’antenne doit être ﬁxée de façon à maintenir une distance minimale de 1 mètre verticalement entre cette antenne (mesurée depuis son point le plus bas) et la tête de toute personne présente; toutes les personnes présentes doivent se tenir à l’extérieur d’un rayon d’exposition maximale admissible de 3 mètres.

Ne pas émettre à l’aide de la radio et de l’antenne lorsque des personnes se trouvent à l’intérieur du rayon d’exposition maximale admissible de cette antenne, à moins que ces personnes (comme le conducteur ou l’opérateur radio) ne soient protégées du champ de l’antenne par un écran métallique relié à la masse. Le rayon d’exposition maximale admissible équivaut à la distance minimale que cette personne doit maintenir entre elle et l’axe de l’antenne pour éviter une exposition aux RF supérieure au niveau d’exposition maximale admissible ﬁxé par la FCC.

Icom exige que l’opérateur radio se conforme aux exigences de la FCC en matière d’exposition aux radiofréquences. Une antenne omnidirectionnelle dont le gain ne dépasse pas 9 dBi doit être ﬁxée à une distance minimale de 5 mètres (mesurée depuis le point le plus bas de l’antenne) verticale-

LE NON-RESPECT DE CES LIMITES PEUT CAUSER, POUR LES PERSONNES SITUÉES DANS LE RAYON D’EXPOSITION MAXIMALE ADMISSIBLE, UNE ABSORPTION DE RAYONNEMENT DE RF SUPÉRIEURE À L’EXPOSITION MAXIMALE ADMISSIBLE FIXÉE PAR LA FCC. L’OPÉRATEUR RADIO EST RESPONSABLE D’ASSURER QUE LES LIMITES D’EXPOSITION MAXIMALE ADMISSIBLE SOIENT RESPECTÉES EN TOUT TEMPS PENDANT LA TRANSMISSION RADIO. L’OPÉRATEUR RADIO DOIT S’ASSURER QU’AUCUNE PERSONNE PRÉSENTE NE SE SITUE À L’INTÉRIEUR DU RAYON D’EXPOSITION MAXIMALE ADMISSIBLE.

Établir le rayon d’exposition maximale admissible ON ESTIME QUE LE RAYON D’EXPOSITION MAXIMALE ADMISSIBLE EST D’ENVIRON 3 M, TEL QUE STIPULÉ DANS LE BULLETIN OET 65 DE LA FCC. CETTE DISTANCE ESTIMÉE TIENT COMPTE D’UN SYSTÈME INSTALLÉ SUR UN NAVIRE UTILISANT LA PUISSANCE MAXIMALE DE LA RADIO ET DES ANTENNES DONT LE GAIN MAXIMAL EST DE 9 dBi.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 6

FCC INFORMATION

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment gener ates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

CAUTION: Changes or modiﬁcations to this transceiver, not expressly approved by Icom Inc., could void your authority to operate this transceiver under FCC regulations.

MISE EN GARDE: Tout changement ou modiﬁcation, non expressément approuvé par Icom Inc., peut annuler l’autorisation de l’utilisateur à utiliser cet appareil conformément à la réglementation FCC.

NOTE

A WARNING STICKER is supplied with the USA version transceiver.

To comply with FCC regulations, this sticker must be afﬁxed in such a location as to be readily seen from the operating controls of the radio as in the diagram below. Make sure the chosen location is clean and dry before applying the sticker.

EXAMPLE

INFORMATION FCC

Cet équipement a été testé et reconnu conforme aux limites ﬁxées pour un appareil numérique de classe A, conformément au point 15 de la réglementation FCC. Ces limites sont déﬁnies de façon à fournir une protection raisonnable contre le brouillage préjudiciable lorsque cet appareil est utilisé dans un environnement commercial. Cet équipement génère, utilise et peut émettre un rayonnement de fréquence radio. S’il n’a pas été installé conformément aux instructions, il peut par ailleurs créer des interférences perturbant les communications radio. L’utilisation de cet appareil dans une zone résidentielle peut provoquer un brouillage préjudiciable, auquel cas l’utilisateur sera tenu de corriger la situation à ses frais.

WARNING.

Page 7

PRECAUTIONS

RWARNING! NEVER

outlet. This may pose a ﬁre hazard or result in an electric shock.

connect the transceiver to an AC

RWARNING! NEVER connect the transceiver to a pow-

er source of more than 16 V DC such as a 24 V DC. This could cause a ﬁre or damage the transceiver.

RWARNING! NEVER reverse the DC power cable po-

larity when connecting to a power source. This could damage the transceiver.

RWARNING! NEVER cut the DC power cable between

the DC plug at the back of the transceiver and fuse holder. If an incorrect connection is made after cutting, the transceiver may be damaged.

RWARNING! NEVER operate the transceiver during a

lightning storm. It may result in an electric shock, cause a ﬁre or damage the transceiver. Always disconnect the power souce and antenna before a storm.

CAUTION: NEVER

operation of the vessel may be hindered or where it could cause bodily injury.

place the transceiver where normal

KEEP the transceiver and microphone at least 1 m away

from the vessel’s magnetic navigation compass.

DO NOT use or place the transceiver in areas with tem-

peratures below –20°C (–4°F) or above +60°C (+140°F) or, in areas subject to direct sunlight, such as the dashboard.

DO NOT use harsh solvents such as benzine or alcohol to

clean the transceiver, as they will damage the transceiver’s surfaces. If the transceiver becomes dusty or dirty, wipe it clean with a soft, dry cloth.

DO NOT disassemble or modify the transceiver for any rea-

son.

BE CAREFUL! The transceiver rear panel will become

hot when operating continuously for long periods of time. Place the transceiver in a secure place to avoid inadvertent use by children.

BE CAREFUL! The transceiver and the optional HM-195

commandmicIV™

protection. However, once the transceiver has been dropped, waterproof protection cannot be guaranteed because of possible damage to the transceiver’s case or the waterproof seal.

* Except for the DC power connector, NMEA In/Out leads, and AF

Out leads.

meet IPX7* requirements for waterproof

Page 8

PRÉCAUTIONS

vii

RAVERTISSEMENT! NE JAMAIS

recepteur a une alimentation CA au risque de provoquer un in cendie ou un choc electrique.

AVERTISSEMENT! NE JAMAIS

récepteur à une source d'alimentation de plus de 16 V CC, comme une source de 24 V CC. Cela pourrait causer un incendie ou endommager l'émetteur-récepteur.

AVERTISSEMENT! NE JAMAIS inverser la po-

larité du câble d'alimentation CC en le branchant à la source d'alimentation. Cela pourrait endommager l'émetteur-récepteur.

AVERTISSEMENT! NE JAMAIS

d'alimentation CC entre la prise CC de la face arrière de l'émetteur-récepteur et le porte-fusible. L’émetteur-récepteur peut être endommagé par la suite en cas de connexion inappropriée.

AVERTISSEMENT! NE JAMAIS

récepteur durant un orage. Cela risquerait de provoquer un choc électrique, un incendie ou d'endommager l'émetteurrécepteur. Toujours débrancher la source d'alimentation et l'antenne avant une tempête.

MISE EN GARDE:

récepteur à un emplacement où il pourrait gêner le fonc tionnement normal du navire ou provoquer des blessures corporelles.

NE JAMAIS

connecter l’emetteur-

brancher l'émetteur-

sectionner le câble

utiliser l'émetteur-

installer l’émetteur-

MAINTENIR l'émetteur-récepteur et le microphone à au

moins 1 mètre du compas de route magnétique du navire.

NE PAS utiliser ou placer l’émetteur-récepteur dans des

zones où la temperature est inférieure à –20° (–4°F) ou supérieure à +60° (+140°F) ou dans des zones soumises au rayonnement solaire direct, telles le tableau de bord.

NE PAS nettoyer l'appareil avec des solvants agressifs tels

que benzène ou alcool, susceptibles d'endommager les surfaces exposées du boîtier. En cas de dépôt de poussière ou de salissures sur l'émetteur-récepteur, il faut l'essuyer avec chiffon doux et sec.

NE PAS démonter ou modiﬁer l'émetteur-récepteur pour

quelque raison que ce soit.

ATTENTION! La face arrière de l’émetteur-récepteur

chauffe en cas d’utilisation continue sur une longue durée. Placer l’émetteur-récepteur hors de portée des enfants pour

éviter toute utilisation inopinée.

ATTENTION! L'émetteur-récepteur et l'accessoire option-

nel

commandmicIV

d'étanchéité IPX7 garantie apres une chute de l’appareil en raison des ﬁssures du boitier ou des dommages au joint d’etancheite et autres dommages eventuels consecutifs a un tel incident.

* À l'exception du connecteur d'alimentation CC, des ﬁls d'entrée ou

de sortie NMEA et des ﬁls de sortie de fréquences audio.

répondent aux exigences de l'indice

*. Cependant, cette etancheite n’est plus

Page 9

PREFACE .............................................................................. i

IMPORTANT .......................................................................... i

EXPLICIT DEFINITIONS .......................................................i

IN CASE OF EMERGENCY ................................................. ii

INSTALLATION NOTE .......................................................... ii

RADIO OPERATOR WARNING .......................................... iii

AVERTISSEMENT POUR LES OPÉRATEURS RADIO ...... iv

FCC INFORMATION ............................................................ v

INFORMATION FCC ............................................................ v

NOTE .................................................................................... v

PRECAUTIONS ................................................................... vi

PRÉCAUTIONS .................................................................. vii

1 OPERATING RULES ....................................................... 1

2 PANEL DESCRIPTION ................................................2–8

■ Front panel ...................................................................2

■ Function display ...........................................................5

■ Softkey function ............................................................7

■ Speaker Microphone ....................................................8

3 PREPARATION..........................................................9–10

■ Entering the MMSI code ..............................................9

■ Entering the ATIS code

(For Dutch and German version transceivers) ...........10

4 BASIC OPERATION ................................................11–18

■ Selecting a Channel ................................................... 11

■ Receiving and transmitting .........................................14

■ Adjusting the volume and squelch levels ...................15

■ Entering a Call channel data ...................................... 16

■ Entering a Channel name ..........................................16

■ Microphone Lock function ..........................................17

■ Adjusting the Backlight level.......................................18

■ Using the AquaQuake water draining function ........... 18

5 SCAN OPERATION ................................................. 19–20

■ Scan types .................................................................19

■ Setting Favorite channels ........................................... 20

■ Starting a scan ........................................................... 20

6 DUALWATCH/TRI-WATCH ............................................21

■ Description ................................................................. 21

■ Operation ...................................................................21

viii

Page 10

TABLE OF CONTENTS (continued)

7 DSC OPERATION ...................................................22–70

■ DSC address ID ........................................................ 22

■ Entering position and time .........................................25

■ Making a Distress call ................................................ 26

■ Making DSC calls ....................................................... 32

■ Receiving DSC calls ..................................................55

■ Transmitted Call log....................................................62

■ Received Call log .......................................................63

■ DSC Settings .............................................................65

■ Making an Individual call using an AIS transponder ..69

8 OTHER FUNCTIONS ...............................................71–73

■ Using the Intercom ..................................................... 71

■ Using the RX Speaker................................................72

■ Using the PA (Public Address) ................................... 72

■ Using the Horn ........................................................... 73

9 MENU SCREEN OPERATION ................................74–83

■ Using the Menu screen ..............................................74

■ Menu screen items .....................................................75

■ Radio Settings items .................................................. 76

■ Conﬁguration items ....................................................78

10 CONNECTIONS AND MAINTENANCE .................. 84–90

■ Connections ............................................................... 84

■ Antenna ...................................................................... 86

■ Fuse replacement ......................................................86

■ Cleaning ..................................................................... 86

■ Supplied accessories ................................................. 86

■ Mounting the transceiver ............................................87

■ MB-132 installation ....................................................88

■ Microphone installation ..............................................89

11 SPECIFICATIONS AND OPTIONS ......................... 91–92

■ Speciﬁcations ............................................................. 91

■ Options ....................................................................... 92

12 CHANNEL LIST .............................................................93

13 TROUBLESHOOTING ...................................................94

14 TEMPLATE .................................................................... 95

15 INFORMATION .............................................................. 97

■ About CE and DOC .................................................... 97

■ Disposal .....................................................................97

INDEX .................................................................................98

Page 11

OPERATING RULES

D Priorities

• Read all rules and regulations pertaining to call priorities, and keep an up-to-date copy handy. Safety and distress calls take priority over all others.

• You must monitor Channel 16 when you are not operating

on another channel.

• False or fraudulent distress calls are prohibited under law.

D Privacy

• Information overheard, but not intended for you, cannot lawfully be used in any way.

• Indecent or profane language is prohibited.

D Radio licenses

(1) SHIP STATION LICENSE

You may require a current radio station license before using the transceiver. It is unlawful to operate a ship station which is not licensed, but required to be.

If required, contact your dealer or the appropriate government agency for a Ship-Radiotelephone license application. This government-issued license states the call sign which is your craft’s identiﬁcation for radio purposes.

(2) OPERATOR’S LICENSE

A Restricted Radiotelephone Operator Permit is the license most often held by small vessel radio operators when a radio is not required for safety purposes.

If required, the Restricted Radiotelephone Operator Permit must be posted or kept with the operator. If required, only a licensed radio operator may operate a transceiver.

However, non-licensed individuals may talk over a transceiver if a licensed operator starts, supervises, ends the call and makes the necessary log entries.

A current copy of the applicable government rules and regulations is only required to be on hand for vessels in which a radio telephone is compulsory. However, even if you are not required to have these on hand it is your responsibility to be thoroughly acquainted with all pertinent rules and regulations.

NOTE: Even though the transceiver is capable of operation on VHF marine channels 1021, 1023, 1081, 1082 and 1083, according to FCC regulations these simplex channels cannot be lawfully used by the general population in USA waters.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 12

Function display (p. 5)Speaker

PANEL DESCRIPTION

 Front panel

UP AND DOWN/CHANNEL SELECT KEYS [∫•CH]/[√•CH]

 Push to select the operating channels, Menu items,

Menu settings, and so on. (pp. 14, 74)

 While scanning, push to check Favorite channels,

change the scanning direction or manually resume a scan. (p. 20)

q DISTRESS KEY [DISTRESS] (pp. 26, 27) Hold down for 3 seconds to make a Distress call.

w ENTER KEY [ENT] (pp. 9, 12, 74) Push to set the entered data, selected item, and so on.

e LEFT AND RIGHT KEYS [Ω]/[≈]

 Push to change to the previous or next key function that

is assigned to the softkeys. (p. 7)

 Push to select the desired character or number in the

table while in the channel name, position, MMSI code entry mode, and so on. (pp. 9, 16, 25)

t CLEAR KEY [CLEAR]

Push to cancel the entered data, or to return to the previ-

ous screen.

y MENU KEY [MENU]

Push to enter or exit the Menu screen.

u VOLUME AND SQUELCH SWITCH/POWER SWITCH

[VOL/SQL•PWR]

 When the power is OFF, hold down for 1 second to turn

ON power. (p. 14)  Hold down for 1 second to turn OFF power.  When the power is ON, push to enter the volume level

adjustment mode.* (p. 15)

• Each push of this switch toggles the mode between the volume level adjustment, squelch threshold level adjustment, operating channel selection, and the LCD and key backlight brightness adjustment, if assigned.

 Rotate to adjust the volume level.* (p. 15)

*The desired function can be assigned in the Menu screen.

(pp. 9, 16, 74)

(p. 74)

Page 13

PANEL DESCRIPTION

i CHANNEL 16/CALL CHANNEL KEY [16/C]

 Push to select Channel 16. (p. 11)

 Hold down for 1 second to select the Call channel. (p. 11)

• “CALL” is displayed when the Call channel is selected.



When the Call channel is selected, hold down for 3 seconds to enter Call channel entry mode. (p. 16)

o SOFTKEYS

Desired functions as described below can be assigned in

the Menu screen.

Distress Call [

Push to enter “DISTRESS CALL” in the DSC menu to se-

lect the nature of the call, and then to make a call.

DSC [

Push to enter the DSC menu to compose a DSC call.

Scan [

Push to start or stop a Normal or Priority scan.

Dualwatch/Tri-watch [

 Push to start Dualwatch or Tri-watch.  Push to stop Dualwatch or Tri-watch when either is ac-

tivated.

High/Low [

Push to set the power to high or low.

• Some channels are set to only low power.

] (For only USA version transceivers.)

] (p. 20)

]

(For only USA version transceivers.)

] (p. 21)

] (p. 14)

Channel/Weather channel [ ]* (pp. 11, 13)

Push to selects and toggles the regular channel and

Weather channel.

*For only the USA and Australian version transceivers.

Channel [ ]* (p. 11) Push to select a regular channel.

* For only the IC-M423, IC-M423G, and IC-M423GE except for

Australian version transceivers.

Public address [ ] (p. 72) Push to enter the PA (Public Address) mode.

RX Speaker [

Push to turn the RX Speaker mode ON or OFF.

Horn [

Push to enter the Horn mode.

Intercom [

Push to enter the Intercom mode.

LO/DX [

Push to turn the Attenuator function ON or OFF.

• “LOCAL” is displayed when the Attenuator function is ON. *For only the USA and Australian version transceivers.

AquaQuake [ ] (p. 18) Holding down to activate the AquaQuake to clear water

away from the speaker grill.

] (p. 72)

] (p. 73)

] (p. 71)

]* (p. 14)

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 14

PANEL DESCRIPTION

 Front panel (Continued)

Function display (p. 5)Speaker

Favorite channel [ ] (p. 20)

 Push to set or clear the displayed channel as a Favorite

(Tag) channel.

 Hold down for 3 seconds to clear or set all Favorite

channels in the selected channel group.

Name [

Push to enter the channel name entry mode.

] (p. 16)

Backlight [ ] (p. 18) Push to enter the LCD and key backlight brightness ad-

justment mode.

• While in the adjustment mode, push [∫]/[√]/[Ω]/[≈] or rotate Dial

to adjust the brightness of the LCD and key backlight.

Log [ ] (p. 63)

Push to enter “RCVD CALL LOG” in the DSC CALLS menu.

Page 15

PANEL DESCRIPTION

qw ietr!0you

!2 !3

 Function display

!9 !8

!6 !5

q BUSY/TRANSMIT ICON (p. 14)

 “

” is displayed when receiving a signal or when

the squelch is open.

 “

” is displayed while transmitting.

w POWER ICON (p. 14)

 “25W” is displayed when high power is selected.  “1W” is displayed when low power is selected.

e RX SPEAKER ICON (p. 72) Displayed while in the RX Speaker mode.

r CHANNEL GROUP ICON (p. 12)

 Shows which channel group is selected, INT, USA,

CAN, ATIS or DSC, depending on the version.

 “WX” is displayed when the weather channel is select-

ed.*

*For only USA and Australian version transceivers.

t CALL CHANNEL ICON (p. 11) Displayed when the Call channel is selected.

y DUPLEX ICON (p. 12) Displayed when a duplex channel is selected.

u FAVORITE CHANNEL ICON (p. 20) Displayed when a Favorite (Tag) channel is selected.

i MESSAGE ICON (p. 63) Blinks when there is an unread DSC message.

o GPS ICON

 Stays ON when the built-in GPS receiver* or an exter-

nal GPS receiver is receiving valid position data.

*For only IC-M423G, IC-M423GE, and IC-M424G.

 Blinks when searching for valid position data.

!0 SWITCH ICON (p. 66) Displayed when the “CH 16 SWITCH” in DSC Settings is

set to OFF.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 16

PANEL DESCRIPTION

!2 !3

 Function display (Continued)

qw iet

!9 !8

!6 !5

!1 RT (Radio Telephone) ICON (For only USA version transceivers.)

Displayed while in the Radio Telephone mode.

• The Radio Telephone mode is terminated if no operation occurs during the preset of time.

• The icon is displayed if the “RT Indicator:” item in the RADIO SET menu is set to “ON.” (p. 77)

!2 LOW BATTERY ICON

Blinks when the battery voltage drops to approximately

10 V DC or less.

!3 CHANNEL NUMBER READOUT

Shows the selected operating channel number.

!4 CHANNEL NAME FIELD

The channel name is displayed, if entered. (p. 16)

0you

!5 KEY ICON (p. 7) Shows the preset function of the softkeys on the front panel.

!6 TIME ZONE INDICATOR

 Shows the current time when GPS data is received, or

the time is manually entered.

• When the GPS current time is invalid, “??” will blink every 2 seconds instead of the current time. After 23.5 hours has passed, “NO TIME” is displayed.

• “??”

*3 hours and 59 minutes for USA version.

will

blink every 2 seconds instead of the current time, after 4 hours* have passed from when the time was manually entered. The manually entered time is held for only 23.5 hours, and after that, “NO TIME” is displayed.

 “LOCAL”  “MNL”  “UTC”

is displayed

when the offset time is set.

when

the time is manually entered

when

the GGA, GLL or GNS GPS

sentence format is included in the GPS signal.

 The date information

is displayed

when

the RMC GPS

sentence format is included in the GPS signal.

 “NO TIME”

is displayed

when no GPS receiver is con-

nected, and no time is manually entered.

NOTE for the IC-M423 and IC-M424:

These models do not come with a built-in GPS receiver.

Therefore an external GPS receiver needs to be connected, or the time needs to be manually entered for

the time zone indicator to be displayed.

Page 17

PANEL DESCRIPTION

Push

!7 POSITION INDICATOR

 Shows the current position when position data is re-

ceived, or the position is manually entered.

• When the GPS position is invalid, “??” may blink every 2 seconds instead of position. The last position is held for only

23.5 hours, and after that, “NO POSITION” is displayed.

•

“??” will blink every 2 seconds instead of position, after hours*

have passed from the time when the position is manually entered. The manually entered position is held for only 23.5 hours, and after that, “NO POSITION” is displayed.

*3 hours and 59 minutes for USA version.

 “NO POSITION” is displayed when no GPS receiver is

connected, and no position is manually entered.

!8 SCAN INDICATOR

 “SCAN 16” is displayed during a Priority scan; “SCAN”

is displayed during a Normal scan. (p. 20)

 “DUAL 16” is displayed during Dualwatch; “TRI 16” is

displayed during Tri-watch. (p. 20)

!9 LOCAL ICON* (p. 14) Displayed when the Attenuator function is turned ON.

*For only USA and Australian version transceivers.

 Softkey function

Various functions can be assigned to the softkeys. When a key function is assigned, the key icon is displayed above the softkey, as shown below.

D Softkey function selection

When “Ω” or “≈” is displayed beside the key icon, sequentially pushing [Ω]/[≈] displays the previous or the next key function that is assigned to the softkey.

Push

*Push this key to start

and stop scan.

The order of the key icons may differ, depending on the version or presetting.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 18

PANEL DESCRIPTION

 Speaker Microphone

Microphone

Speaker

IC-M423G/IC-M423GE

/IC-M424G

q PTT [PTT]

Hold down to transmit, release to receive. (p. 14)

w CHANNEL UP/DOWN KEYS [Y]/[Z]

Push either key to check Favorite channels, change scan-

ning direction or manually resumes a scan. (pp. 14, 20)

IC-M423/IC-M424

e TRANSMIT POWER KEY [H/L]*

 Push to toggle the power high or low. (p. 14)

• Some channels are set to only low power.

 While holding down [H/L], turn ON the power to turn the

Microphone Lock function ON or OFF. (p. 17)

* [HI/LO] is printed for the IC-M423/IC-M424.

r CHANNEL 16/CALL CHANNEL KEY [16/C]

 Push to select Channel 16. (p. 11)  Hold down for 1 second to select the Call channel. (p. 11)

• The “CALL” icon is displayed when the Call channel is selected.

*For only the IC-M423G, IC-M423GE, and IC-M424G.

Page 19

PREPARATION

 Entering the MMSI code

The 9 digit MMSI (Maritime Mobile Service Identity: DSC self ID) code can be entered at power ON.

This initial code setting can be made only once.

After being set, it can be changed by only your dealer or distributor. If your MMSI code has already been entered, the following steps are not necessary.

q Hold down [PWR](Dial) to turn ON the power.

• Three short beeps sound, and “NO DSC MMSI” is displayed.

w Push [ENT] to start the MMSI code entry.

• Push [CLEAR] twice to cancel the entry, and go to the normal operating screen. In this case, the transceiver cannot make a DSC call. To enter the MMSI code, turn OFF the power, then turn it ON again.

e Enter your MMSI code in the following way:

• Select a desired number using Dial, or [∫]/[√]/[Ω]/[≈].

• Push [ENT] or Dial to set it.

• To move the cursor, select either arrow, “←” or “→,” then push

[ENT] or Dial.

r Repeat step e to enter all 9 digits. t After entering the 9 digit code, “FINISH” is automatically

selected, and then push [ENT] or Dial to set it.

y The “MMSI CONFIRMATION” screen is displayed.

u Enter your MMSI code again for confirmation.

• Enter in the same way as steps e through t.

i When your MMSI code entry is successfully completed,

the screen as shown below is brieﬂy displayed.

• After that, the normal operating screen is displayed.

The entered MMSI code can be checked in the MENU screen. (p. 74)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

NOTE: Depending on the transceiver version, the ATIS

code entry may be required after entering the MMSI code. See the next page for details.

Page 20

PREPARATION

 Entering the ATIS code (For Dutch and German* version transceivers)

The 10 digit ATIS (Automatic Transmitter Identiﬁcation System) code can be entered at power ON.

This initial code setting can be made only once.

After being set, it can be changed by only your dealer or distributor. If your ATIS code has already been entered, the following steps are not necessary.

q After entered the MMSI code, “Push [ENT] to Register

Your ATIS” is displayed.

w Push [ENT] to start entering the ATIS code.

• Push [CLEAR] twice to cancel the entry, and go to the normal operating mode. In this case, the ATIS function is disabled. To enter the ATIS code, turn OFF the power, then turn it ON again.

e Enter your ATIS code in the following manner:

• Select a desired number using Dial, or [∫]/[√]/[Ω]/[≈].

• Push [ENT] or Dial to set it.

• To move the cursor, select either arrow, “←” or “→,” then push [ENT] or Dial.

r Repeat step e to enter all 10 digits. t After entering the 10 digit code, “FINISH” is automatically

selected, and then push [ENT] or Dial to set it.

y The “ATIS CONFIRMATION” screen is displayed.

u Enter your ATIS code again for conﬁrmation.

• Enter in the same manner as steps e through t.

i When your ATIS code is successfully entered, the screen

as shown below is brieﬂy displayed.

• After that, the normal operating screen is displayed.

The entered ATIS code can be checked in the MENU screen. (p. 74)

* Presetting is required to use the ATIS mode in the German version.

Contact your dealer for details.

Page 21

BASIC OPERATION

 Selecting a Channel

D Channel 16

Channel 16 is the distress and safety channel. It is used for establishing initial contact with a station and for emergency communications. Channel 16 is monitored during both Dualwatch and Tri-watch. While standing by, you must monitor Channel 16.

 Push [16/C] to select Channel 16.  Push [CH/WX]* to return to the screen displayed before

you selected Channel 16, or push [Y]/[Z] to select an operating channel.

* [CHAN] is displayed instead of [CH/WX] for the IC-M423/IC-

M423G/IC-M423GE except for Australian version.

D Call channel

Each regular channel group has a separate leisure use Call channel. The Call channel is monitored during Tri-watch. The Call channel data can be entered. The channels used to store your most often used channel in each channel group, for quick recall. (p. 16)

 Hold down [16/C] for 1 second to select the Call channel of

the selected channel group.

• “CALL” and the Call channel number is displayed.

• Each channel group has an independent call channel after entry. (p. 16)

 Push [CH/WX]* to return to the screen displayed before

you selected Call channels, or push [Y]/[Z] to select an operating channel.

* [CHAN] is displayed instead of [CH/WX] for the IC-M423/IC-

M423G/IC-M423GE except for Australian version.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 22

BASIC OPERATION

 Selecting a Channel (Continued)

D Selecting the Channel group

There are preset international channels in the IC-M423/ICM423G/IC-M423GE/IC-M424/IC-M424G. Except for the European versions, you can select a channel group suitable for your operating area, as described below.

q Push [MENU]. w Rotate Dial or push [∫]/[√] to select “Radio Settings,” and

then push [ENT].

e Rotate Dial or push [∫]/[√] to select “CHAN Group,” and

then push [ENT].

r Rotate Dial or push [∫]/[√] to select the desired channel

group, and then push [ENT].

• USA (USA), International (INT), CAN (Canada), ATIS or DSC channel groups may be selected, depending on the transceiver version.

• Push [BACK] to return to the previous screen.

t Push [EXIT] to exit the Menu screen. y Push [∫]/[√] to select a channel.

• Pushing [Y]/[Z] on the microphone selects only Favorite chan- nels.

• “DUP” is displayed when a duplex channel is selected.

• “A” is displayed when a simplex channel is selected.

Channel group icon is displayed

When the USA channel group is selected.

Page 23

BASIC OPERATION

D Selecting a Weather channel

(For only USA and Australian version transceivers) The transceiver has 10 weather channels. These are used for monitoring broadcasts from NOAA. (National Oceanographic and Atmospheric Administration) The transceiver can automatically detect a weather alert tone on the selected weather channel, or while scanning. (p. 19)

q Push [CH/WX] once or twice to select a weather channel.

• “WX” is displayed when a weather channel is selected.

• “WX ” is displayed when the Weather Alert function is ON. (p. 77)

w Push [∫]/[√] to select a channel.

• Pushing [Y]/[Z] on the microphone also selects a channel.

When weather alert is OFF.

The Weather channel list

WX channel

1 2 3 4 5 6 7 8 9

Frequency (MHz)

Transmit Receive

RX only 162.550 RX only 162.400 RX only 162.475 RX only 162.425 RX only 162.450 RX only 162.500 RX only 162.525 RX only 161.650 RX only 161.775 RX only 163.275

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

When weather alert is ON.

Page 24

BASIC OPERATION

 Receiving and transmitting

CAUTION: DO NOT transmit without an antenna.

q Hold down [PWR](Dial) to turn ON the power. w Set the audio and squelch levels. (p. 15)

 First, open the squelch. Then, adjust the audio output

level. After that, adjust the squelch level until the noise

just disappears. e Change the channel group. (p. 12) r Push [∫]/[√] to select a channel. (pp. 11, 12)

• Pushing [Y]/[Z] on the microphone selects only Favorite chan-

nels.

• When receiving a signal, “ ” is displayed and audio is heard.

• Further adjustment of the volume level may be necessary.

t Push [LO/DX] to turn the receive Attenuator function ON

or OFF, if necessary.

• For only USA and Australian version transceivers.

• “LOCAL” is displayed when the receive Attenuator function is

ON.

y Push [HI/LO] to select the output power, if necessary.

• Pushing [H/L] or [HI/LO] on the microphone also select the out-

put power.

• “25W” is displayed when high power is selected, and “1W” is

displayed when low power is selected.

• Choose low power for short range communications, choose high

power for longer distance communications.

• Some channels are for only low power.

u Hold down [PTT] to transmit, then speak at your normal

voice level.

• “ ” is displayed.

• Channel 70 cannot be used for transmission other than DSC.

i Release [PTT] to receive.

 Information

The Noise Cancel function reduces random noise components in the transmit and/or receive signal. See page

Simplex channels, 3, 21, 23, 61, 64, 81, 82, and 83 CANNOT be lawfully used by the general public in USA waters.

IMPORTANT: To maximize the readability of your transmitted signal, pause a few seconds after pushing [PTT], hold the microphone 5 to 10 cm (2 to 4 inches) from your mouth and speak at a normal voice level.

 NOTE for the TOT (Time-out Timer) function

The TOT function inhibits continuous transmission beyond a preset time period after the transmission starts. 10 seconds before transmission is cutoff, a beep sounds to indicate the transmission will be shut down and “TOT” is displayed in the channel name ﬁeld. Transmission is not possible for 10 seconds after this shut down.

for details.

Page 25

BASIC OPERATION

Microphone

t y

Microphone

 Adjusting the volume and

squelch levels

The volume and squelch levels can be adjusted with [VOL/ SQL](Dial).

q Push [VOL/SQL](Dial) one or more times to display the

volume or squelch adjustment screen.

w Rotate [VOL/SQL](Dial) or push [∫]/[√]/[Ω]/[≈] to adjust

the volume or squelch level.

• The transceiver has 20 volume levels and OFF.

• The transceiver has 11 squelch levels. OPEN is completely

open, 10 is tight squelch, 1 is loose squelch.

• If no key is push for about 5 seconds, the transceiver sets the selected volume level, and returns to the normal mode.

e Push [ENT] to set the level, and exit the volume adjust-

ment mode.

• Push [CLEAR] to cancel.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

IC-M423G/IC-M423GE

/IC-M424G

IC-M423/IC-M424

The desired function can be assigned to Dial. See page 79 for details.

Page 26

BASIC OPERATION

 Entering a Call channel data

You can enter data in Call channel in each channel group for quick recall.

q Select the desired channel group (INT, USA, CAN, ATIS,

or DSC) to be entered. (p. 12)

w Hold down [16/C] for 1 second to select the Call channel of

the selected channel group.

• “CALL” and the Call channel number is displayed.

e Hold down [16/C] again for 3 seconds (until a long beep

changes to 2 short beeps) to enter the Call channel entry mode.

r Rotate Dial or push [∫]/[√] to select a channel.

t Push [ENT] to save the displayed channel as the Call

channel.

• Push [CLEAR] to cancel.

 Entering a Channel name

Enter a name of up to 10 characters. Capital letters, 0 to 9, some symbols, (! " # $ % & ' ( ) * + , – . / [ \ ] ^ _ : ; < = > ?) and a space can be entered.

q Push [∫]/[√](CH) to select a channel.

• First, cancel the Dualwatch, Tri-watch or Scan function, if activated.

w Push [NAME] to open the channel name enter screen.

• A cursor is displayed on the ﬁrst character.

e Enter the desired channel name in the following manner:

• Select a desired character using Dial, or [∫]/[√]/[Ω]/[≈].

• Push [ENT] or Dial to set it.

• To move the cursor, select either arrow, “←” or “→,” then push [ENT] or Dial.

• Push [123], [!$?], or [ABC] to select a character group.

• Select “SPACE,” then push [ENT] to enter a space.

• Select “DELETE,” then push [ENT] to delete a character.

• Push [CLEAR] to cancel and return to the previous screen.

Page 27

BASIC OPERATION

r Repeat step e to enter all characters.

t Push [Ω]/[≈]/[∫]/[√] to select “FINISH,” then push [ENT] to

set the name and return to the previous screen.

 Microphone Lock function

The Microphone Lock function electrically locks [∫], [√], [16/C],* This prevents accidental channel changes and function access.

*1For only the IC-M423G, IC-M423GE, and IC-M424G. *2 [HI/LO] is printed for the IC-M423 and IC-M424.

and the [H/L]*2 keys on the supplied microphone.

 While holding down [H/L] or [HI/LO] on the microphone,

hold down [PWR](Dial) to turn ON the transceiver and turn the Microphone Lock function ON or OFF.

[H/L]

IC-M423G/IC-M423GE

/IC-M424G

[16/C]

[Y]/[Z]

[HI/LO]

IC-M423/IC-M424

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 28

BASIC OPERATION

 Adjusting the Backlight level

The function display and keys can be backlit for better visibility under low light conditions. The backlight is adjustable in 7 levels and OFF. The adjustment method, described below differs depending on the presetting.

 Push [BKLT] to show the backlight adjustment screen. Ro-

tate Dial or push [∫]/[√]/[Ω]/[≈] to adjust the brightness of the LCD and key backlight, and then, push [ENT].

• If no key operation is performed for about 5 seconds, the transceiver sets the selected backlight level, and returns to the normal mode.

When the Backlight function is assigned to the [VOL/ SQL](Dial):

q Push [VOL/SQL](Dial) one or more times to display the

backlight adjustment screen.

w Rotate [VOL/SQL](Dial) to adjust the brightness of the

LCD and key backlight, and then, push [ENT].

The desired function can be assigned to Dial. See page 79 for details.

 Using the AquaQuake water

draining function

The AquaQuake water draining function clears water away from the speaker grill. Without this function, water may mufﬂe the sound coming from the speaker. A buzzing sound is heard when this function is activated.

 While holding down [AQUA], the AquaQuake function is

activated to clear water away from the speaker grill.

• While holding down [AQUA], a low buzzing sounds to drain water, regardless of the volume level setting.

• The transceiver keys, except [DISTRESS], are disabled while the AquaQuake function is activated.

When the AquaQuake function is activated.

Page 29

SCAN OPERATION

(For only USA and Australian version transceivers.)

■ Scan types

Scanning is an efﬁcient way to locate signals quickly over a wide frequency range. The transceiver has a Priority scan and a Normal scan.

When the Weather Alert function* is ON, the weather channel is also checked while scanning. (p. 77)

*For only USA and Australian version transceivers.

PRIORITY SCAN

CH 01

WX*

CH 05 CH 04

*When the weather alert function is activated.

The Priority scan sequentially searches through all Favorite channels while monitoring Channel 16. When a signal is detected on Channel 16, the scan pauses until the signal disappears. When a signal is detected on a channel other than Channel 16, the scan becomes a Dualwatch until the signal disappears.

CH 16

CH 02

CH 03

Set the Favorite channels (scanned channel) before scanning. Clear the Favorite channels which inconveniently stop scanning, such as those for digital communication use. (Refer to the next page for details.)

Choose Priority or Normal scan in the Menu screen. (p. 76)

NORMAL SCAN

CH 01 CH 02

WX*

CH 05 CH 04

*When the weather alert function is activated.

The Normal scan, like the Priority scan, sequentially searches through all Favorite channels. However, unlike the Priority scan, Channel 16 is not checked unless it is set as a Favorite channel.

CH 03

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 30

SCAN OPERATION

■ Setting Favorite channels

For more efﬁcient scanning, add desired channels as Favorite channels, or clear the Favorite on unwanted channels. Channels that are not tagged will be skipped while scanning. Favorite channels can be independently assigned to each channel group (INT, USA, CAN, ATIS, or DSC).

q Select the desired channel group. (p. 12) w Select the desired channel to be set as a Favorite channel. e Push [] to set the displayed channel as a Favorite channel.

• “” is displayed on the display.

r To cancel the Favorite channel setting, repeat step e.

• “” disappears.

✓ Clearing (or setting) all Favorite channels

Hold down [] for 3 seconds (until a long beep changes to 2 short beeps) to clear all Favorite channel settings in the selected channel group.

• Repeat above procedure to set all channels as Favorite channels.

[Example]: Starting a Normal scan.

Push

[SCAN]

■ Starting a scan

First, set the scan type (Priority or Normal scan) and scan resume timer in the Menu screen. (p. 76)

q Select the desired channel group. (p. 12) w Set the Favorite channels, as described to the left. e Make sure the squelch is closed to start a scan. r Push [SCAN] to start a Priority or Normal scan.

• “SCAN 16” is displayed during a Priority scan; “SCAN” is displayed during a Normal scan.

• When a signal is detected, the scan pauses until the signal disappears, or resumes after pausing 5 seconds, depending on the setting. (Channel 16 is still monitored during a Priority scan.)

• Push [Y]/[Z] on either transceiver or microphone, to check the

scanning Favorite channels, change the scanning direction or manually resume the scan.

• A beep tone sounds and “16” blinks when a signal is received on

Channel 16 during a Priority scan.

t To stop the scan, push [CLEAR] or repeat step r.

Scan starts. When a signal is received.

Page 31

DUALWATCH/TRI-WATCH

■ Description

Dualwatch monitors Channel 16 while you are receiving on another channel; Tri-watch monitors Channel 16 and the Call channel while receiving another channel. Dualwatch and Tri-watch are convenient for monitoring Channel 16 when you are operating on another channel.

DUALWATCH/TRI-WATCH SIMULATION

Call channel

Ch 16

Dualwatch

• If a signal is received on Channel 16, Dualwatch and Triwatch pause on Channel 16 until the signal disappears.

• If a signal is received on the Call channel during Tri-watch, Tri-watch becomes Dualwatch until the signal disappears.

• To transmit on the selected channel during a Dualwatch or Tri-watch scan, hold down [PTT].

Ch 88

Ch 16

Ch 88

Tri-watch

Ch 75

■ Operation

q Select Dualwatch or Tri-watch in the Menu screen. (p. 76) w Push [Y]/[Z] to select the desired operating channel. e Push [DW] to start a Dualwatch or Tri-watch scan.

• “DUAL 16” is displayed during Dualwatch; “TRI 16” is displayed during Tri-watch.

• A beep tone sounds when a signal is received on Channel 16.

r To cancel Dualwatch or Tri-watch, push [DW] again.

[Example]: Operating Tri-watch on INT Channel 25.

Tri-watch starts.

Tri-watch resumes after the signal disappears.

Signal is received on Call channel.

Signal received on Channel 16 takes priority.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 32

DSC OPERATION

■ DSC address ID

D Entering an Individual ID

A total of 100 DSC address IDs can be entered and assigned a name of up to 10 characters.

q Enter “INDIVIDUAL ID” in the DSC SETTINGS menu.

MENU ➪ DSC Settings  ➪  (Push [MENU].)

w Push [ADD].

• The “INDIVIDUAL ID” entry screen is displayed.

e Enter a desired individual ID in the following way:

• Select a desired number using Dial, or [Y]/[Z]/[Ω]/[≈].

• Push [ENT] or Dial to set it.

• To move the cursor, select either arrow, “←” or “→,” then push [ENT] or Dial.

The ﬁrst digit is speciﬁed as ‘0,’ and the second digit is

other than ‘0’ for a Group ID. The ﬁrst two digits are ‘0’ for any Coast station ID.

r Repeat step e to enter all 9 digits.

(Rotate Dial, then push [ENT].)

Individual ID



t After entering the 9 digit code, push [ENT] or Dial to set it.

•The ID name entry screen is displayed.

y Enter a desired 10 digit ID name in the following way:

• Select a desired character using Dial, or [Y]/[Z]/[Ω]/[≈].

• Push [ENT] or Dial to set it.

• To move the cursor, select either arrow, “←” or “→,” then push [ENT] or Dial.

• Push [123], [!$?], or [ABC] to select a character group.

u After entering the ID name, select “FINISH” using Dial, or

[Y]/[Z]/[Ω]/[≈], then push [ENT] or Dial to set it.

• The “INDIVIDUAL ID” list screen is displayed.

i Push [MENU] to exit the MENU screen.

Page 33

DSC OPERATION

D Entering a Group ID

q Enter “GROUP ID” in the DSC SETTINGS menu.

MENU ➪ DSC Settings ➪  (Push [MENU].)

w Push [ADD].

• The “GROUP ID” entry screen is displayed.

e Enter a desired group ID in the following way:

• Select a desired number using Dial, or [Y]/[Z]/[Ω]/[≈].

• Push [ENT] or Dial to set it.

• To move the cursor, select either arrow, “←” or “→,” then push [ENT] or Dial.

• Push [EXIT] to return to the normal operating mode.

• Push [BACK] to return to the previous screen.

The ﬁrst digit is speciﬁed as ‘0,’ and the second digit is

other than ‘0’ for a Group ID. The ﬁrst two digits are ‘0’ for any Coast station ID.

r Repeat step e to enter the speciﬁc 9 digits group code.

(Rotate Dial, then push [ENT].)

Group ID



t After entering the 9 digit code, push [ENT] or Dial to set it.

• Group ID name entry screen is displayed.

y Enter a desired 10 digit ID name in the following way:

• Select a desired character using Dial, or [Y]/[Z]/[Ω]/[≈].

• Push [ENT] or Dial to set it.

• To move the cursor, select either arrow, “←” or “→,” then push [ENT] or Dial.

• Push [123], [!$?], or [ABC] to select a character group.

u After entering the ID name, select “FINISH” using Dial, or

[Y]/[Z]/[Ω]/[≈], then push [ENT] or Dial to save it.

• The “GROUP ID” list screen is displayed.

i Push [MENU] to exit the MENU screen.

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 34

DSC OPERATION

■ DSC address ID (Continued)

D Deleting Individual and Group IDs

q Enter “INDIVIDUAL ID” or “GROUP ID” in the DSC SET-

TINGS menu.

MENU ➪ DSC Settings ➪  (Push [MENU].)

• When no address ID is entered, “No ID” is displayed. In this case, push [MENU] to exit the MENU screen.

w Rotate Dial or push [Y]/[Z] to select a desired ID name,

then push [DEL].

(Rotate Dial, then push [ENT].)

Individual ID

/

Group ID

e Push [OK] to delete the ID, and return to the “INDIVIDUAL

ID” or “GROUP ID” list screen.



• Push [CANCEL] to cancel it.

r Push [MENU] to exit the MENU screen.

Page 35

DSC OPERATION

■ Entering position and time

A Distress call should include the ship’s position and time. If no GPS receiver is connected and built-in GPS receiver* is not receiving valid position data, your position and UTC (Universal Time Coordinated) time should be manually entered. They are automatically included when a GPS receiver compatible with the NMEA 0183 (ver. 2.0 or later) format is connected.

*For only the IC-M423G, IC-M423GE, and IC-M424G.

• Manual entry is disabled when a GPS receiver is connected.

• Manually entered position and time will be held for only

23.5 hours.

q Enter “POSITION INPUT” in the DSC SETTINGS menu.

MENU ➪ DSC Settings ➪ Position Input (Push [MENU].)

w Enter your latitude and longitude position using Dial, or

[Y]/[Z]/[Ω]/[≈].

• Select a desired number using Dial, or [Y]/[Z]/[Ω]/[≈].

• Push [ENT] or Dial to set it.

• To move the cursor, select either arrow, “←” or “→,” then push [ENT] or Dial.

• Select N (North latitude) or S (South latitude) when the cursor is on the ‘N’ or ‘S’ position.

• Select W (West longitude) or E (East longitude) when the cursor is on the ‘W’ or ‘E’ position.

(Rotate Dial, then push [ENT].)

• Push [EXIT] to return to the normal operating mode.

• Push [BACK] to return to the previous screen.

e After entering the position, push [ENT] to save it. r The UTC time entry screen is displayed, enter the UTC

time in the following way:

• Select a desired number using Dial, or [Y]/[Z]/[Ω]/[≈].

• Push [ENT] or Dial to set it.

• To move the cursor, select either arrow, “←” or “→,” then push [ENT] or Dial.

t Push [ENT] or Dial to save your position and time.

• Return to the “DSC SETTINGS” screen.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 36

DSC OPERATION

■ Making a Distress call

A Distress call should be made if, in the opinion of the Master, that the ship or a person is in distress and requires immediate assistance.

NEVER MAKE A DISTRESS CALL IF YOUR SHIP OR A PERSON IS NOT IN AN EMERGENCY. A DISTRESS CALL SHOULD BE MADE ONLY WHEN IMMEDIATE HELP IS NEEDED.

D Simple call

q While lifting up the key cover, hold down [DISTRESS] for 3

seconds to transmit the Distress call.

• While holding down [DISTRESS], count down beeps sound and both the key and display backlighting blink.

• DSC channel (Channel 70) is automatically selected and the Distress call is transmitted.

w After transmitting the call, the transceiver waits for an ac-

knowledgment call.

• The Distress call is automatically transmitted every 3.5 to 4.5 minutes, until an acknowledgement is received (‘Call repeat’ mode), or DSC Cancel call is made. (p. 29)

• Push [RESEND] to manually transmit the Distress repeat call.

• Push [Ω]/[≈] then push [INFO] to display the transmitted Dis-

tress call information.

• Push [Ω]/[≈] then push [PAUSE] to pause the ‘Call repeat’ mode,

push [RESUME] to resume it.

e After receiving the acknowledgment, push [ALARM OFF]

then reply using the microphone.

➥ A distress alert default contains:

• Nature of distress: Undesignated distress

• Position information: The latest GPS or manually entered posi-

tion is held for 23.5 hours, or until the power is turned OFF.

Page 37

DSC OPERATION

D Making a Regular call

The nature of the Distress call should be included in the Distress call.

q Enter “DISTRESS CALL” in the DSC CALLS menu.*

MENU ➪ DSC Calls ➪ Distress Call (Push [MENU].)

* Only USA version, you can enter “DISTRESS CALL” by pushing

[DTRS].

w Select the nature of the distress using Dial or [Y]/[Z], then

push Dial or [ENT].

• ‘Undesignated,’ ‘Fire,Explosion,’ ‘Flooding,’ ‘Collision,’ ‘Grounding,’ ‘Capsizing,’ ‘Sinking,’ ‘Adrift,’ ‘Abandoning ship,’ ‘Piracy’ or ‘Man Overboard’ are selectable.

• The nature of the distress is stored for 10 minutes after select-

ing.

• Push [EXIT] to return to the normal operating mode.

• Push [BACK] to return to the previous screen.

(Rotate Dial, then push [ENT].)

e The Distress call conﬁrmation screen is displayed.

• Rotate Dial or push [Y]/[Z] to see the hidden lines.

r Hold down [DISTRESS] for 3 seconds to transmit the Dis-

tress call.

• While holding down [DISTRESS], count down beeps sound and both the key and display backlighting blink.

• The selected nature of the distress is stored for 10 minutes.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 38

DSC OPERATION

■ Making a Distress call (Continued) t After transmitting the call, the transceiver waits for an ac-

knowledgment call.

• The Distress call is automatically transmitted every 3.5 to 4.5

minutes, until an acknowledgement is received (‘Call repeat’ mode), or DSC cancel call is made. (p. 29)

• Push [RESEND] to manually transmit the Distress repeat call.

• Push [Ω]/[≈] then push [INFO] to display the transmitted Dis-

tress call information.

• Push [Ω]/[≈] then push [PAUSE] to pause the ‘Call repeat’ mode,

push [RESUME] to resume it.

y After receiving an acknowledgment call, push [ALARM

OFF] then reply using the microphone.

➥ A distress alert contains:

• Nature of distress: Selected in step w.

• Position information: The latest GPS or manually entered

position is held for 23.5 hours, or until the power is turned OFF.

When no GPS receiver is connected and built-in GPS receiver* is not receiving valid position data, and both position and time have been manually entered, the screen as shown below is displayed. Edit your latitude and longitude position and UTC time as follows:

*For only the IC-M423G, IC-M423GE, and IC-M424G.

➥ Push [CHG], then edit your latitude and longitude posi-

tion and UTC time.

• Select a desired number using Dial, or [Y]/[Z]/[Ω]/[≈].

• Push [ENT] or Dial to set it.

• To move the cursor, select either arrow, “←” or “→,” then push [ENT] or Dial.

• Select N (North latitude) or S (South latitude) when the cursor is on the ‘N’ or ‘S’ position.

• Select W (West longitude) or E (East longitude) when the cursor is on the ‘W’ or ‘E’ position.

Page 39

DSC OPERATION

D Canceling a Distress call

q While waiting for an acknowledgment call, push [CAN-

CEL].

w Push [CONTINUE].

• Push [BACK] to return to waiting for an acknowledgement call.

e Push [FINISH].

• Push [EXIT] to return to waiting for an acknowledgement call.

r The Distress cancel call is transmitted.

t Channel 16 is automatically selected.

• Report your situation using the microphone.

• After the report, push [EXIT] to return to the normal operating mode.*

• Only USA version, push [RESEND] to resend the call.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

* Only USA version, the exit conﬁrma-

tion dialog is displayed.

Page 40

DSC OPERATION

D Making a Distress Relay Acknowledgement

(For only USA version transceivers) When receiving a Distress Relay Call, you can transmit an

ac knowledgement, as shown below.

q When a Distress Relay Call is received, alarm sounds and

the screen shown below is displayed.

Push [ALARM OFF] to stop the alarm.

• Even if you do not push [ALARM OFF], the alarm stops after 2 minutes, and then the screen in step w is displayed.

w Push [ACPT].

• Even if you do not push [ACPT], the screen in step e is displayed after 10 seconds.

• Push [IGN] to ignore the call and return to the normal operating mode.

• Push [INFO] to display the Distress Relay Call information.

• Push [PAUSE] to pause the countdown.

About Received call information:

• Push [IGN] to ignore the call and return to the normal operating mode.

• Push [BACK] to return to the previous screen.

• Push [ACPT] to go to the next step.

e Push [ACK].

• Push [EXIT] to return to the normal operating mode.*

*The exit conﬁrmation dialog is displayed.

Page 41

DSC OPERATION

r The Distress Relay Acknowledgement conﬁrmation screen

is displayed.

Push [CALL] to transmit the acknowledgement call.

• Push [EXIT] to return to the normal operating mode.* *The exit conﬁrmation dialog (p. 29) is displayed.

• Push [BACK] to return to the previous screen.

t The Distress Relay Acknowledgement is transmitted.

y Channel 16 is automatically selected.

• Push [EXIT] to return to the normal operating mode.* *The exit conﬁrmation dialog (p. 29) is displayed.

• Push [RESEND] to resend the acknowledgement.

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 42

DSC OPERATION

■ Making DSC calls

To ensure correct operation of the DSC function, make

sure you correctly set the CH70 SQL LEVEL. (p. 67)

D Making an individual call

The Individual call function allows you to make a DSC call to only a speciﬁc station.

q Enter “INDIVIDUAL CALL” in the DSC CALLS menu.

MENU ➪ DSC Calls ➪ Individual Call (Push [MENU].)

w Select a desired preset individual address, or “Manual In-

put,” using Dial or [Y]/[Z], then push Dial or [ENT].

• The ID code for the Individual call can be entered ﬁrst. (p. 22)

• When “Manual Input” is selected, enter a desired 9 digit MMSI ID code for the individual you wish to call.

• Push [EXIT] to return to the normal operating mode.

• Push [BACK] to return to the previous screen.

(Rotate Dial, then push [ENT].)

About Manual Entry:

Enter a desired individual ID in the following way:

• Select a desired number using Dial, or [Ω]/[≈].

• Push [ENT] or Dial to set it.

• To move the cursor, select either arrow, “←” or “→,” then push [ENT] or Dial.

• The ﬁrst digit is speciﬁed as ‘0’ for a Group ID. If a 9 digit Group ID is entered, an error beep sounds when pushing [ENT] or dial.

• The ﬁrst two digits are ‘0’ for any coast station ID.

NOTE: When a coast station is selected in step w, the voice channel is automatically speciﬁed by the coast station. Therefore, skip step e and go directly to step r.

Page 43

DSC OPERATION

e Select a desired intership channel using Dial or [Y]/[Z],

then push [ENT].

• Intership channels are already preset into the transceiver in the recommended order.

r A conﬁrmation screen is displayed.

• Conﬁrm the call contents.

t Push [CALL] to make an Individual call.

• If Channel 70 is busy, the transceiver stands by until the channel becomes clear.

y Standby on Channel 70 until an acknowledgement is received.

• Push [EXIT] to return to the normal operating mode.* * Only USA version, the exit conﬁrmation dialog (p. 29) is displayed.

• Only USA version, push [RESEND] to resend the call.

Displayed for only USA version.

u When the acknowledgement ‘Able to comply’ is received,

alarm sounds and the screen below is displayed.

Push [ALARM OFF] to stop the alarm and then select the

intership channel speciﬁed in step e.

• A different intership channel will be selected if the station you called cannot use the channel.

• Reply using the microphone. And go to step i.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 44

DSC OPERATION

■ Making DSC calls D Making an Individual call (continued)

Or, when the acknowledgement ‘Unable to comply’ is re-

ceived, alarm sounds and the screen below is displayed.

Push [ALARM OFF] to stop the alarm. Then push [EXIT]

to return to the operating channel (before you entered the MENU screen).

i After communicating, push [EXIT] to return to the normal

operating mode.

✓ Tip

When the optional MA-500TR/MA-510TR*

sponder is connected to your transceiver, you can make in-

dividual DSC calls to selected AIS targets on the transponder without needing to enter the target’s MMSI code. See pages 69 and 70 for more details.

* Unreleased as of April 2020.

class b ais tran-

Making an Individual Acknowledgement

When you receive an Individual call, you can make an acknowledgement (‘Able to Comply,’ ‘Propose New Channel,’ or ‘Unable to Comply’) by using the on-screen prompts. (Quick ACK) Also, you can send an acknowledgement through the MENU system. (Man ual ACK)

Quick ACK:

q When an Individual call is received, alarm sounds and the

screen below is displayed.

Push [ALARM OFF] to stop the alarm.

w Push [ACK].

Page 45

DSC OPERATION

e Select one of three options, then push [ENT].

• Push [EXIT] to return to the normal operating mode.

• Push [BACK] to return to the previous screen.

• Able to Comply: Make an acknowledgment call without any changes.

• Unable to Comply: You cannot make a communication.

The Acknowledgement call (‘Unable to

Comply’) can be automatically transmitted, if set. See page 65 for details.

• Propose New Channel: You can make an acknowledgement call, but you specify the intership channel. Select a desired intership channel, using Dial, or [Y]/[Z], then push [ENT].

r The Individual ACK conﬁrmation screen is displayed.

Push [CALL] to make an acknowledgement call.

t The screens shown below are displayed.

Displayed for only USA version.

y Reply to the call using the microphone. u Push [EXIT] to return to the normal operating mode.*

* Only USA version, the exit conﬁrmation dialog (p. 29) is displayed.

• Only USA version, push [RESEND] to resend the acknowledgement.

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 46

DSC OPERATION

■ Making DSC calls D Making an Individual Acknowledgement (continued)

Manual ACK:

q Enter “INDIVIDUAL ACK” in the DSC CALLS menu.

MENU ➪ DSC Calls ➪ Individual ACK (Push [MENU].)

• When no Individual call has been received, the Individual ACK

item will not be displayed.

(Rotate Dial, then push [ENT].)

w Select a desired individual address or ID code to reply to,

using Dial or [Y]/[Z], then push [ENT].

• Push [EXIT] to return to the normal operating mode.

• Push [BACK] to return to the previous screen.

e Do steps e to u, as described in “Quick ACK:,” beginning

on the previous page.

D Making a Group call

The Group call function allows you to make a DSC signal to only a speciﬁc group.

q Enter “GROUP CALL” in the DSC CALLS menu.

MENU ➪ DSC Calls ➪ Group Call (Push [MENU].)

w Select a desired preset group address or “Manual Input,”

using Dial or [Y]/[Z], then push Dial or [ENT].

• The ID code for the Group call can be entered ﬁrst. (p. 23)

• When “Manual Input” is selected, enter the 8 digit ID code for the group you wish to call.

• Push [EXIT] to return to the normal operating mode.

• Push [BACK] to return to the previous screen.

(Rotate Dial, then push [ENT].)

Page 47

DSC OPERATION

e Select a desired intership channel using Dial or [Y]/[Z],

then push [ENT].

• Intership channels are already preset into the transceiver in the recommended order.

About Manual Entry:

Enter a desired group ID in the following way:

• Select a desired number using Dial, or [Ω]/[≈].

• Push [ENT] or Dial to set it.

• To move the cursor, select either arrow, “←” or “→,” then push [ENT] or Dial.

• The ﬁrst digit is speciﬁed as ‘0,’ and the second digit is other than ‘0’ for a Group ID.

• The ﬁrst two digits are ‘0’ for any Coast station ID.

r A conﬁrmation screen is displayed.

• Conﬁrm the call contents.

t Push [CALL] to make a Group call.

• If Channel 70 is busy, the transceiver stands by until the channel becomes clear.

y After the Group call has been transmitted, the following

screen is displayed.

Displayed for only USA version.

u Announce the information using the microphone. i After the announcement, push [EXIT] to return to the nor-

mal operating mode.*

* Only USA version, the exit conﬁrmation dialog (p. 29) is displayed.

• Only USA version, push [RESEND] to resend the call.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 48

DSC OPERATION

■ Making DSC calls (Continued)

D Making an All Ships call

All ships that have DSC transceiver use Channel 70 as their ‘listening channel.’ When you want to announce a message to these ships, use the ‘All Ships Call’ function.

q Enter “ALL SHIPS CALL” in the DSC CALLS menu.

MENU ➪ DSC Calls ➪ All Ships Call (Push [MENU].)

w Select a desired category, using Dial or [Y]/[Z], then push

Dial or [ENT].

• The selectable category may differ, depending on the presetting. Ask your dealer for the selectable categories.

• Push [EXIT] to return to the normal operating mode.

• Push [BACK] to return to the previous screen.

e Select a desired trafﬁc channel, using Dial or [Y]/[Z], then

push Dial or [ENT].

• The selected channel is displayed.

(Rotate Dial, then push [ENT].)

r A conﬁrmation screen is displayed.

• Conﬁrm the call contents.

t Push [CALL] to make an All Ships call.

• If Channel 70 is busy, the transceiver stands by until the channel becomes clear.

y After the All Ships call has been transmitted, the following

screen is displayed.

Displayed for only USA version.

u Announce the message using the microphone. i After the announcement, push [EXIT] to return to the nor-

mal operating mode.*

* Only USA version, the exit conﬁrmation dialog (p. 29) is displayed.

• Only USA version, push [RESEND] to resend the call.

Page 49

DSC OPERATION

D Making a Position Request Call

(For only USA and Australian version transceivers) Make a Position Request Call when you want to know a speciﬁc ship’s current position, and so on.

q Enter “POSITION REQUEST” in the DSC CALLS menu.

MENU ➪ DSC Calls ➪ Position Request (Push [MENU].)

w Select a desired preset individual address, or “Manual In-

put,” using Dial or [Y]/[Z], then push Dial or [ENT].

• The ID code for the Position Request Call can be entered ﬁrst. (p.

22)

• When “Manual Input” is selected, enter a desired 9 digit MMSI ID code for the individual you wish to call.

• Push [EXIT] to return to the normal operating mode.

• Push [BACK] to return to the previous screen.

(Rotate Dial, then push [ENT].)

About Manual Entry:

Enter a desired individual ID in the following way:

• Select a desired number using Dial, or [Y]/[Z]/[Ω]/[≈].

• Push [ENT] or Dial to set it.

• To move the cursor, select either arrow, “←” or “→,” then push [ENT] or Dial.

• The ﬁrst digit is speciﬁed as ‘0’ for a Group ID. If a Group ID is entered, an error beep sounds after pushing [FINISH].

• The ﬁrst two digits are ‘0’ for any coast station ID.

e A conﬁrmation screen is displayed.

• Conﬁrm the call contents.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 50

DSC OPERATION

■ Making DSC calls D Making a Position Request call (continued)

r Push [CALL] to make a Position Request Call.

• If Channel 70 is busy, the transceiver stands by until the channel

becomes clear.

u Push [ALARM OFF] to stop the alarm, and then the screen

as shown below is displayed.

t After the Position Request Call has been transmitted, the

following screen is displayed.

• Push [EXIT] to return to the normal operating mode.*

* Only USA version, the exit conﬁrmation dialog (p. 29) is displayed.

• Only USA version, push [RESEND] to resend the call.

Displayed for only USA version.

y When the acknowledgement call is received, alarm sounds

and the following screen is displayed.

i Push [EXIT] to return to the normal operating mode.*

* Only USA version, the exit conﬁrmation dialog (p. 29) is displayed.

Page 51

DSC OPERATION

D Making a Position Report Call

(For only USA and Australian version transceivers) Make a Position Report Call when you want to announce your own position to a speciﬁc ship and receive an answer back.

q Enter “POSITION REPORT” in the DSC CALLS menu.

MENU ➪ DSC Calls ➪ Position Report (Push [MENU].)

w Select a desired preset individual address, or “Manual In-

put,” using Dial or [Y]/[Z], then push Dial or [ENT].

• The ID code for the Individual call can be entered ﬁrst. (p. 22)

• When “Manual Input” is selected, enter a desired 9 digit MMSI ID code for the individual you wish to call.

• Push [EXIT] to return to the normal operating mode.

• Push [BACK] to return to the previous screen.

(Rotate Dial, then push [ENT].)

About Manual Entry:

Enter a desired individual ID in the following way:

• Select a desired number using Dial, or [Y]/[Z]/[Ω]/[≈].

• Push [ENT] or Dial to set it.

• To move the cursor, select either arrow, “←” or “→,” then push [ENT] or Dial.

• The ﬁrst digit is speciﬁed as ‘0’ for a Group ID. If a Group ID is entered, an error beep sounds after pushing [FINISH].

• The ﬁrst two digits are ‘0’ for any coast station ID.

e A conﬁrmation screen is displayed.

• Conﬁrm the call contents.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 52

DSC OPERATION

■ Making DSC calls D Making a Position Report call (continued)

r Push [CALL] to make a Position Report Call.

• If Channel 70 is busy, the transceiver stands by until the channel

becomes clear.

t After the Position Report Call has been transmitted, the

transceiver automatically returns to the normal operating mode.

*For only the IC-M423G, IC-M423GE, and IC-M424G.

➥ Push [CHG], then edit your latitude and longitude position

and UTC time.

• Select a desired number using Dial, or [Y]/[Z]/[Ω]/[≈].

• Push [ENT] or Dial to set it.

• To move the cursor, select either arrow, “←” or “→,” then push [ENT] or Dial.

• Select N (North latitude) or S (South latitude) when the cursor is on the ‘N’ or ‘S’ position.

• Select W (West longitude) or E (East longitude) when the cursor is on the ‘W’ or ‘E’ position.

Page 53

DSC OPERATION

D Making a Polling Request Call

(For only USA and Australian version transceivers) Make a Polling Request Call when you want to know a speciﬁc vessel is in the communication area, or not.

q Enter “POLLING REQUEST” in the DSC CALLS menu.

MENU ➪ DSC Calls ➪ Polling Request (Push [MENU].)

w Select a desired preset individual address, or “Manual In-

put,” using Dial or [Y]/[Z], then push Dial or [ENT].

• The ID code for the Individual call can be entered ﬁrst. (p. 22)

• When “Manual Input” is selected, enter a desired 9 digit MMSI ID code for the individual you wish to call.

• Push [EXIT] to return to the normal operating mode.

• Push [BACK] to return to the previous screen.

(Rotate Dial, then push [ENT].)

About Manual Entry:

Enter a desired individual ID in the following way:

• Select a desired number using Dial, or [Y]/[Z]/[Ω]/[≈].

• Push [ENT] or Dial to set it.

• To move the cursor, select either arrow, “←” or “→,” then push [ENT] or Dial.

• The ﬁrst digit is speciﬁed as ‘0’ for a Group ID. If a Group ID is entered, an error beep sounds after pushing [FINISH].

• The ﬁrst two digits are ‘0’ for any coast station ID.

e A conﬁrmation screen is displayed.

• Conﬁrm the call contents.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 54

DSC OPERATION

■ Making DSC calls D Making a Polling Request call (continued)

r Push [CALL] to make a Polling Request Call.

• If Channel 70 is busy, the transceiver stands by until the channel

becomes clear.

u Push [ALARM OFF] to stop the alarm, and then the screen

as shown below is displayed.

t After the Polling Request Call has been transmitted, the

following screen is displayed.

• Push [EXIT] to return to the normal operating mode.*

* Only USA version, the exit conﬁrmation dialog (p. 29) is displayed.

• Only USA version, push [RESEND] to resend the call.

Displayed for only USA version.

y When the acknowledgement call is received, alarm sounds

and the following screen is displayed.

i Push [EXIT] to return to the normal operating mode.*

* Only USA version, the exit conﬁrmation dialog (p. 29) is displayed.

Page 55

DSC OPERATION

D Making a Test call

Testing on the exclusive DSC distress and safety calling channels should be avoided as much as possible. When testing on a distress or safety channel is unavoidable, you should indicate that these are test transmissions. Normally the test call would require no further communications between the two stations involved.

q Enter “TEST CALL” in the DSC CALLS menu.

MENU (Push [MENU].)

w Select a desired preset individual address, or “Manual In-

put,” then push Dial or [ENT].

• The ID code for the Individual call can be entered ﬁrst. (p. 22)

• When “Manual Input” is selected, enter the 9 digit MMSI ID code for the individual you wish to call.

• Push [EXIT] to return to the normal operating mode.

• Push [BACK] to return to the previous screen.

➪ DSC Calls ➪ Test Call

(Rotate Dial, then push [ENT].)

About Manual Entry:

Enter a desired address ID in the following way:

• Select a desired number using Dial, or [Ω]/[≈].

• Push [ENT] or Dial to set it.

• To move the cursor, select either arrow, “←” or “→,” then push [ENT] or Dial.

• The ﬁrst digit is speciﬁed as ‘0’ for a Group ID. If a 9 digit Group ID is entered, an error beep sounds when pushing [ENT] or dial.

• The ﬁrst two digits are ‘0’ for any Coast station ID.

e A conﬁrmation screen is displayed.

• Conﬁrm the call contents.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 56

DSC OPERATION

■ Making DSC calls D Making a Test call (continued)

r Push [CALL] to make a Test call.

• If Channel 70 is busy, the transceiver stands by until the channel

becomes clear.

u Push [ALARM OFF] to stop the alarm, and then the screen

as shown below is displayed.

t After the Test call has been transmitted, the following

screen is displayed.*

• Push [EXIT] to return to the normal operating mode.*

* Only USA version, the exit conﬁrmation dialog (p. 29) is displayed.

• Only USA version, push [RESEND] to resend the call.

Displayed for only USA version.

y When the acknowledgement call is received, alarm sounds

and the following screen is displayed.

i Push [EXIT] to return to the normal operating mode.*

* Only USA version, the exit conﬁrmation dialog (p. 29) is displayed.

Page 57

DSC OPERATION

D Making a Test Acknowledgement call

When the “TEST ACK” in DSC settings is set to ‘Auto TX’ (p. 65), the transceiver automatically transmits a reply call when a Test call is received.

Quick ACK:

q When a Test call is received, alarm sounds and the screen

shown below is displayed.

Push [ALARM OFF] to stop the alarm.

w Push [ACK].

• Push [EXIT] to return to the normal operating mode.

• Push [INFO] to display the Test call information.

About Received call information:

• Push [EXIT] to return to the normal operating mode.

• Push [BACK] to return to the previous screen.

• Push [ACK] to go to the next step.

e The Test ACK conﬁrmation screen is displayed.

Push [CALL] to make an acknowledgement call.

r While transmitting the acknowledgement call, the screen

shown below is displayed, and then returns to the normal operating mode.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 58

DSC OPERATION

■ Making DSC calls D Making a Test Acknowledgement call (continued)

Manual ACK:

q Enter “TEST ACK” in the DSC CALLS menu.

MENU ➪ DSC Calls ➪ Test ACK (Push [MENU].)

• If no Test call has been received, the “TEST ACK” item will not

be displayed.

• Push [EXIT] to return to the normal operating mode.

• Push [BACK] to return to the previous screen.

w Select a desired Test call to reply to, using Dial or [Y]/[Z],

then push Dial or [ENT].

(Rotate Dial, then push [ENT].)

e The Test ACK conﬁrmation screen is displayed.

Push [CALL] to make an acknowledgement call.

r While transmitting the acknowledgement call, the screen

shown below is displayed, and then returns to the normal operating mode.

Page 59

DSC OPERATION

D Making a Position Reply call

Make a Position Reply call when a Position Request call is received. When the “POSITION ACK” in DSC Settings is set to ‘Auto TX’ (p. 65), the transceiver automatically transmits a reply call when a Position Request call is received.

Quick Reply:

q When a Position Request call is received, alarm sounds

and the screen shown below is displayed.

Push [ALARM OFF] to stop the alarm.

w Push [ACK].

• Push [EXIT] to return to the normal operating mode.

• Push [INFO] to display the Test call information.

About Received call information:

• Push [EXIT] to return to the normal operating mode.

• Push [BACK] to return to the previous screen.

• Push [ACK] to go to the next step.

e The Position Reply conﬁrmation screen is displayed.

Push [CALL] to make a reply call.

r While transmitting the reply call, the screen shown below is

displayed, and then returns to the normal operating mode.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 60

DSC OPERATION

■ Making DSC calls D Making a Position Reply call (continued)

Manual Reply:

q Enter “POSITION REPLY” in the DSC CALLS menu.

MENU ➪ DSC Calls ➪ Position Reply (Push [MENU].)

• If no Position Request call is received, the Position Reply item

will not be displayed.

• Push [EXIT] to return to the normal operating mode.

• Push [BACK] to return to the previous screen.

(Rotate Dial, then push [ENT].)

w Select a desired Position Request call to reply to, using

Dial or [Y]/[Z], then push Dial or [ENT].

e The Position Reply call conﬁrmation screen is displayed.

Push [CALL] to make an acknowledgement call.

r While transmitting the reply call, the screen shown below is

displayed, and then returns to the normal operating mode.

*For only the IC-M423G, IC-M423GE, and IC-M424G.

➥ Push [CHG], then edit your latitude and longitude position

and UTC time.

• Select a desired number using Dial, or [Y]/[Z]/[Ω]/[≈].

• Push [ENT] or Dial to set it.

• To move the cursor, select either arrow, “←” or “→,” then push [ENT] or Dial.

• Select N (North latitude) or S (South latitude) when the cursor is on the ‘N’ or ‘S’ position.

• Select W (West longitude) or E (East longitude) when the cursor is on the ‘W’ or ‘E’ position.

Page 61

DSC OPERATION

D Making a Position Report Reply call

Make a Position Report Reply call when a Position Report call is received.

Quick Reply:

q When a Position Report call is received, alarm sounds and

the screen as shown below is displayed.

Push [ALARM OFF] to stop the alarm.

w Push [ACK].

• Push [EXIT] to return to the normal operating mode.

• Push [INFO] to display the Position Report Request call informa-

tion.

About Received call information:

• Push [EXIT] to return to the normal operating mode.

• Push [BACK] to return to the previous screen.

• Push [ACK] to go to the next step.

e The Position Report Reply conﬁrmation screen is dis-

played.

Push [CALL] to make a reply call.

r While transmitting the reply call, the screen shown below is

displayed, and then returns to the normal operating mode.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 62

DSC OPERATION

■ Making DSC calls D Making a Position Report Reply call (continued)

Manual Reply:

q Enter “REPORT REPLY” in the DSC CALLS menu.

MENU ➪ DSC Calls ➪ Position Report Reply (Push [MENU].)

• If no Position Report Request call is received, the Position Re-

port Reply item will not be displayed.

• Push [EXIT] to return to the normal operating mode.

• Push [BACK] to return to the previous screen.

w Select a desired Position Report Request call to reply to,

using Dial or [Y]/[Z], then push Dial or [ENT].

(Rotate Dial, then push [ENT].)

e The Position Report Reply call conﬁrmation screen is dis-

played.

Push [CALL] to make an acknowledgement call.

r While transmitting the reply call, the screen shown below is

displayed, and then returns to the normal operating mode.

Page 63

DSC OPERATION

D Making a Polling Request Reply call

Make a Polling Request Reply call when a Polling Request call is received. When the “POSITION ACK” in DSC Settings is set to ‘Auto TX’ (p. 65), the transceiver automatically transmits a reply call when receiving a Polling Request call.

Quick Reply:

q When a Polling Request call is received, alarm sounds

and the screen as shown below is displayed.

Push [ALARM OFF] to stop the alarm.

w Push [ACK].

• Push [EXIT] to return to the normal operating mode.

• Push [INFO] to display the Polling Request call information.

About Received call information:

• Push [EXIT] to return to the normal operating mode.

• Push [BACK] to return to the previous screen.

• Push [ACK] to go to the next step.

e The Polling Request Reply conﬁrmation screen is dis-

played.

Push [CALL] to make a reply call.

r While transmitting the reply call, the screen shown below is

displayed, and then returns to the normal operating mode.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 64

DSC OPERATION

■ Making DSC calls D Making a Polling Request Reply call (continued)

Manual Reply:

q Enter “POLLING REPLY” in the DSC CALLS menu.

MENU ➪ DSC Calls ➪ Polling Reply (Push [MENU].)

• If no Polling Request call is received, the Polling Reply item will

not be displayed.

• Push [EXIT] to return to the normal operating mode.

• Push [BACK] to return to the previous screen.

w Select a desired Polling Request call to be replied, using

Dial or [Y]/[Z], then push Dial or [ENT].

(Rotate Dial, then push [ENT].)

e The Polling Request Reply call conﬁrmation screen is dis-

played. Push [CALL] to make an acknowledgement call.

r While transmitting the reply call, the screen shown below is

displayed, and then returns to the normal operating mode.

Page 65

DSC OPERATION

 Receiving DSC calls

D Receiving a Distress Call/Distress Acknowledgement

[Example]: Receiving a Distress Call.

When a Distress Call is received:

 The emergency alarm sounds for 2 minutes.  “RCVD DISTRESS” is displayed and the backlight blinks.

q Push [ALARM OFF] to

stop the alarm and the blinking backlight.

• Even if you do not push [ALARM OFF], the alarm stops after 2 minutes, and then the screen in step w is displayed.

w Push a softkey to select

your desired action.

[IGN]

 Push to return to the normal operating mode.

• The transceiver exits the DSC mode.

• By pushing [PTT], the transceiver also exits the DSC mode.

• “ ” continues to blink and the Call is stored in the Received

Call Log.

[INFO]

 Push to display the Received call information. (p. 63)

[PAUSE] (For only USA version transceivers)

 Push to pause the countdown.

• The softkey is displayed if the “CH Auto Switch:” item in the DSC SET menu (p. 66) is set to “10 sec.”

• Push [RESUME] to resume the countdown.

• The call is saved in the received call log.

[ACPT]

 Push to accept the call.

And then, push [CH 16] to change the operating channel

to Channel 16, and then monitor it, as a coast station may require assistance.

• Even if you haven’t pushed [CH 16] within 10 seconds, the operating channel automatically changes to Channel 16. (p. 66)

Push

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 66

DSC OPERATION

 Receiving DSC calls (Continued)

D Receiving a Distress Relay Call/Distress Relay Acknowledgement

[Example]: Receiving a Distress Relay call.

When a Distress Relay call is received:

 The emergency alarm sounds for 2 minutes.  “RCVD DISTRESS RELAY” is displayed and the backlight

blinks.

q Push [ALARM OFF] to

stop the alarm and the blinking backlight.

• Even if you do not push [ALARM OFF], the alarm stops after 2 minutes, and then the screen in step w is displayed.

w Push a softkey to select

your desired action.

[IGN]

 Push to return to the normal operating mode.

• The transceiver exits the DSC mode.

• By pushing [PTT], the transceiver also exits the DSC mode.

• “ ” continues to blink and the Call is stored in the Received

Call Log.

[INFO]

 Push to display the Received call information. (p. 63)

[PAUSE] (For only USA version transceivers)

 Push to pause the countdown.

• The softkey is displayed if the “CH Auto Switch:” item in the DSC SET menu (p. 66) is set to “10 sec.”

• Push [RESUME] to resume the countdown.

• The call is saved in the received call log.

[ACPT]

 Push to accept the call.

And then, push [CH 16] to change the operating channel

to Channel 16, and then monitor it, as a coast station may require assistance.

• Even if you haven’t pushed [CH 16] within 10 seconds, the oper-

ating channel automatically changes to Channel 16. (p. 66)

• Push [EXIT] to return to the normal operating mode.*

* Only USA version, the exit conﬁrmation dialog (p. 29) is displayed.

Push

Page 67

DSC OPERATION

D Receiving an Individual Call

When an Individual Call is received:  The alarm sounds for 2 minutes.

 “RCVD INDIVIDUAL CALL” is displayed. The backlight may

blink for 2 minutes, depending on the received Category.

q Push [ALARM OFF] to stop the alarm and the blinking

backlight.

• Even if you do not push [ALARM OFF], the alarm stops after 2 minutes, and then the screen in step w is displayed.

w Push a softkey to select your desired action.

[IGN]

 Push to ignore the Call and return to the normal operating

mode.

• The transceiver exits the DSC mode.

• “ ” continues to blink and the Call is stored in the Received

Call Log.

[INFO]

 Push to display the Received call information. (p. 63)

[PAUSE] (For only USA version transceivers)

 Push to pause the countdown.

• The softkey is displayed if the “CH Auto Switch:” item in the DSC SET menu (p. 66) is set to “10 sec.”

• Push [RESUME] to resume the countdown.

• The call is saved in the received call log.

[ACK]

 Push to display the “INDIVIDUAL ACK” screen to reply to

the Call. Select one of three options, depending on your situation. See page 34 for details of the Individual Acknowledgement procedures.

• Push [EXIT] to return to the normal operating mode.*

* Only USA version, the exit conﬁrmation dialog (p. 29) is displayed.

When “INDIVIDUAL ACK” is set to “Auto TX (Unable),” the transceiver automatically replies to the Call. In that case, both the TX and RX calls are stored in the Transmitted and Received Call Logs.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 68

DSC OPERATION

 Receiving DSC calls (Continued)

D Receiving a Group Call/Geographical Area Call/All Ships Call

When a Group Call, Geographical Area Call, or All Ships Call is received:

 The alarm sounds for 2 minutes.  “RCVD GROUP CALL,” “RCVD GEOGRAPHICAL,” or

“RCVD ALL SHIPS CALL” is displayed. The backlight may blink for 2 minutes, depending on the received Category.

q Push [ALARM OFF] to stop the alarm and the blinking

backlight.

• Even if you do not push [ALARM OFF], the alarm stops after 2 minutes, and then the screen in step w is displayed.

w Push a softkey to select your desired action.

[IGN]

 Push to ignore the Call and return to the normal operating

mode.

• The transceiver exits the DSC mode.

• “ ” continues to blink and the Call is stored in the Received Call Log.

[INFO]

 Push to display the Received call information. (p. 63)

[PAUSE] (For only USA version transceivers)

 Push to pause the countdown.

• The softkey is displayed if the “CH Auto Switch:” item in the DSC

SET menu (p. 66) is set to “10 sec.”

• Push [RESUME] to resume the countdown.

• The call is saved in the received call log.

[ACPT]

 Push to monitor the channel speciﬁed by the calling sta-

tion for an announcement from the calling station.

• Push [EXIT] to return to the normal operating mode.*

* Only USA version, the exit conﬁrmation dialog (p. 29) is displayed.

Note for Geographical Area Call

When no GPS receiver is connected or if there is a problem with the external receiver, all Geographical Area Calls are received, regardless of your position.

Page 69

DSC OPERATION

D Receiving a Position Request Call

When a Position Request Call is received:

 The alarm sounds for 2 minutes.  “RCVD POS REQUEST” is displayed. The backlight blinks

for 2 minutes.

q Push [ALARM OFF] to stop the alarm and the blinking

backlight.

• Even if you do not push [ALARM OFF], the alarm stops after 2 minutes, and then the screen in step w is displayed.

w Push a softkey to select your desired action.

USA version

[IGN]  Push to ignore the Call and return to the normal operating

mode.

• The transceiver exits the DSC mode.

• “ ” continues to blink and the Call is stored in the Received Call Log.

[INFO]

 Push to display the Received call information. (p. 63)

[UNABLE] (For only USA version transceivers)

 Push to transmit the “Unable to Comply” acknowledgement.

• The call is saved in the DSC Log.

[ABLE] (For only USA version transceivers)  Push to transmit the “Able to Comply” acknowledgement.

• The call is saved in the DSC Log.

[ACK]

 Push to display the “POSITION REPLY” screen and send

a reply to the Call. (p. 49)

When “POSITION ACK” is set to “Auto TX,” the transceiver automatically replies to the Call. In that case, both the TX and RX calls are stored in the Transmitted and Received Call Logs.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 70

DSC OPERATION

 Receiving DSC calls (Continued)

D Receiving a Position Report Call

When a Position Report Call is received:

 The alarm sounds for 2 minutes.  “RCVD POSITION REPORT” is displayed. The backlight

blinks for 2 minutes.

q Push [ALARM OFF] to stop the alarm and the blinking

backlight.

• Even if you do not push [ALARM OFF], the alarm stops after 2 minutes, and then the screen in step w is displayed.

w Push a softkey to select your desired action.

[EXIT]  Push to ignore the Call and return to the normal operat-

ing mode.

• The transceiver exits the DSC mode.

• “ ” continues to blink and the Call is stored in the Received Call Log.

[INFO]

 Push to display the Received call information. (p. 63)

Page 71

D Receiving a Polling Request call/Test Call

[Example]: Receiving a Polling Request call.

When a Polling Request call is received:

 The alarm sounds for 2 minutes.  “RCVD POLLING REQUEST” is displayed. The backlight

blinks for 2 minutes.

q Push [ALARM OFF] to stop the alarm and the blinking

backlight.

• Even if you do not push [ALARM OFF], the alarm stops after 2 minutes, and then the screen in step w is displayed.

DSC OPERATION

[IGN]

 Push to ignore the Call and return to the normal operat-

ing mode.

• The transceiver exits the DSC mode.

• “ ” continues to blink and the Call is stored in the Received Call Log.

[INFO]

 Push to display the Received call information. (p. 63)

[ACK]

 Push to display the “POLLING REPLY” screen to reply

to the Call. (p. 53)

1 2 3 4 5 6 7 8 9 10 11 12

w Push a softkey to select your desired action.

When “POSITION ACK” or “TEST ACK” is set to “Auto TX,” the transceiver automatically replies to the Call. In that case, both the TX and RX calls are stored in the Transmitted and Received Call Logs.

13 14 15 16

Page 72

DSC OPERATION

 Receiving DSC calls (Continued)

D Receiving a Test Acknowledgement Call

When a Test Acknowledgement Call is received:

 The alarm sounds for 2 minutes.  “RCVD TEST ACK” is displayed. The backlight blinks for

2 minutes.

q Push [ALARM OFF] to stop the alarm and the blinking

backlight.

• Even if you do not push [ALARM OFF], the alarm stops after 2 minutes, and then the screen in step w is displayed.

w Push a softkey to select your desired action.

[EXIT]

 Push to return to the normal operating mode.

• The transceiver exits the DSC mode.

• “ ” continues to blink and the Call is stored in the Received

Call Log.

 Transmitted Call log

The transceiver automatically stores up to 50 transmitted calls, and the logs can be used as a supplement to your logbook.

q Enter “TX CALL LOG” in the DSC CALLS menu.

MENU  DSC Calls  Transmitted Call Log (Push [MENU].)

w Push [Y]/[Z] to select the desired item, then push [ENT].

• Push [BACK] to return to the previous screen.

• Push [EXIT] to return to the normal operating mode.

e Rotate Dial to scroll the DSC message contents.

r To delete the displayed DSC message, push [DEL].

• The conﬁrmation screen is displayed, then push [OK] to delete.

t Push [EXIT] to return to the normal operating mode.

(Rotate Dial, then push [ENT].)

Rotate

Page 73

DSC OPERATION

 Received Call log

The transceiver automatically stores up to 50 distress messages and 50 other messages, and they can be used as a supplement to your logbook.

• While in the normal operating mode, “ ” blinks in the upper right corner of the LCD when there is an unread DSC message.

D Distress message

q Push [LOG] to enter “RCVD CALL LOG” in the DSC CALLS

menu, or you can enter it through the Menu screen.

MENU  DSC Calls  Received Call Log (Push [MENU].)

w Push [Y]/[Z] to select “Distress,” then push [ENT].

• The Distress messages are stored in “Distress.”

• “ ” is displayed when there are unread DSC messages.

• “ ” is displayed when there are no unread DSC messages.

• No icon is displayed when there are no DSC messages.

• Push [BACK] to return to the previous screen.

• Push [EXIT] to return to the normal operating mode.

(Rotate Dial, then push [ENT].)

e Push [Y]/[Z] to select the desired item, then push [ENT].

r Rotate Dial to scroll the DSC message contents.

Rotate

t To delete the displayed DSC message, push [DEL].

• The conﬁrmation screen is displayed, then push [OK] to delete.

y Push [EXIT] to return to the normal operating mode.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 74

DSC OPERATION

 Received Call log (Continued)

D Other messages

q Push [LOG] to enter “RCVD CALL LOG” in the DSC CALLS

menu, or you can enter it through the Menu screen.

MENU  DSC Calls  Received Call Log (Push [MENU].)

w Push [Y]/[Z] to select “Others,” then push [ENT].

• The messages other than the Distress are stored in “Others.”

• “ ” is displayed when there are unread DSC messages.

• “ ” is displayed when there are no unread DSC messages.

• No icon is displayed when there are no DSC messages.

• Push [BACK] to return to the previous screen.

• Push [EXIT] to return to the normal operating mode.

e Push [Y]/[Z] to select the desired item, then push [ENT].

• The message in the unopened ﬁle has not been read.

(Rotate Dial, then push [ENT].)

r Rotate Dial to scroll the DSC message contents.

• The stored message has various information, depending on the DSC call type.

Rotate

t To delete the displayed DSC message, push [DEL].

• The conﬁrmation screen is displayed, then push [OK] to delete.

y Push [EXIT] to return to the normal operating mode.

Page 75

DSC OPERATION

 DSC Settings

D Position Entry (See page 25) D Add Individual ID/Group ID (See pages 22, 23) D Delete Individual ID/Group ID (See page 24)

D Automatic Acknowledgement

These items set the Automatic Acknowledgement function to “Auto TX” or “Manual TX.” When an Individual, Position Request, Polling Request, or Test Call is received, the transceiver automatically transmits an Individual Acknowledgement, Position Reply, Polling Reply or Test Acknowledgement Call, respectively.

When “INDIVIDUAL ACK” is set to “Auto TX,” the trans-

ceiver automatically transmits the Acknowledgment call including “Unable to Comply” (No Reason Given) after receivng the Individual call.

Enter either “INDIVIDUAL ACK,” “POSITION ACK” or “TEST ACK” in the DSC Settings menu.

MENU  DSC Settings  

(Push [MENU].)

MENU  DSC Settings  

(Rotate Dial, then push [ENT].)

Individual ACK

Position ACK

Test ACK



w Rotate Dial

[ENT].

• Push [BACK] to cancel and return to the DSC Settings menu.

e Push [EXIT] to return to the normal operating mode.

to select “Auto TX” or “Manual TX,” then push

(default)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 76

DSC OPERATION

 DSC Settings (Continued)

D Channel Auto Switch function/Channel 16 Switch function

Channel Auto Switch Function:

(For only USA version transceivers) By regulation, after receiving a DSC call, the transceiver changes the operating channel to the channel assigned by the received DSC call. However, when this setting is set to “OFF,” the function enables the transceiver to remain on the operating channel, even after receiving a Distress call.

q Enter “CH AUTO SWITCH”

MENU  DSC Settings  CH Auto Switch (Push [MENU].)

w Rotate Dial or push [Y]/[Z] to set the Channel Auto Switch

function to “Auto (No Delay),” “10 Second Delay,” or “OFF,” then push [ENT].

• Push [BACK] to return to the previous screen.

in the DSC Settings menu

(Rotate Dial, then push [ENT].)

(default)

Auto (No Delay): After receiving a DSC call, and [ACPT]

10 Second Delay: After receiving a Distress call, and

OFF : Even after receiving a Distress call, the

e Push [EXIT] to return to the normal operating mode.

Channel 16 Switch Function:

For transceivers other than USA versions, the Channel Auto switch function is applies to only Distress calls. The transceiver changes the operating channel to Channel 16 after receiving a Distress call.

is pushed on the confirmation screen, the transceiver immediately changes to the channel assigned by the received DSC call.

[ACPT] is pushed on the confirmation screen, the transceiver remains on the current operating channel for 10 seconds. After that, the transceiver automatically changes to the channel assigned by the received DSC call. (default)

transceiver remains on the operating channel.

• “ ” is displayed.

Page 77

DSC OPERATION

D Alarm

Set the Alarm function ON or OFF, depending on the Category or Status.

q Enter “ALARM”

MENU  DSC Settings  Alarm (Push [MENU].)

w Rotate Dial or push [Y]/[Z] to select the status, then push

[ENT].

• Push [BACK] to return to the previous screen.

• “ Safety,” “Routine,” “Warning,” “Self-Terminate” and “Discrete” are selectable. (default: ON )

e Rotate Dial or push [Y]/[Z] to set the Alarm setting to “ON”

or “OFF.”

r Push [EXIT] to return to the normal operating mode.

in the DSC Settings menu

(Rotate Dial, then push [ENT].)

D Channel 70 Squelch level

Set the squelch level on Channel 70. The transceiver has 11 squelch levels between 1 (loose squelch) and 10 (tight squelch) and OPEN. OPEN is completely open.

q Enter “CH 70 SQL LEVEL”

MENU  DSC Settings  CH 70 SQL Level (Push [MENU].)

w Rotate Dial or push [Y]/[Z] to adjust the squelch level until

the noise just disappears, then push [ENT].

• Push [BACK] to cancel and return to the DSC Settings menu.

e Push [EXIT] to return to the normal operating mode.

in the DSC Settings menu

(Rotate Dial, then push [ENT].)

(default)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 78

DSC OPERATION

 DSC Settings (Continued)

D DSC Loop Test

The DSC loop test function sends transmit DSC signals to the receive AF circuit to compare and check the TX and RX signals at the AF level.

q Enter “DSC LOOP TEST”

MENU  DSC Settings  DSC Loop Test (Push [MENU].)

w Push [ENT] to start the DSC loop test.

• Push [BACK] to return to the previous screen.

• When the transmit DSC and receive DSC signals match, “OK” is displayed.

e Push [EXIT] to return to the normal operating mode.

If “NG” is displayed in step w, either or both TX and RX DSC circuits has a problem. In that case, you will have to send the transceiver to your nearest dealer for repair.

in the DSC Settings menu

(Rotate Dial, then push [ENT].)

Page 79

DSC OPERATION

 Making an Individual call using an AIS transponder

When the optional MA-500TR/MA-510TR* CLASS B AIS TRANSPONDER is connected to your transceiver, an individual DSC call can be transmitted to a selected AIS target, without needing to enter the target’s MMSI code. In this case, the call type is automatically set to Routine. See page 85 for connecting instructions.

* Unreleased as of April 2020.

To ensure correct operation of the DSC function, make sure you correctly set the CH70 SQL LEVEL. (p. 67)

Step 1: Transponder’s operation

NOTE: 510TR Instruction manual for the MA-510TR

q Select a desired AIS target on the plotter, target list or dan-

ger list display.

• You can also go to the next step whenever the detail screen of

• Make sure the transceiver is in the normal operating mode. Oth-

Push [DSC] to display the voice channel selection screen, and then push [Y] or [Z] to select a desired voice channel*.

• Voice channels are already preset into the transponder in recom-

* When a coast station is selected in step q, a voice channel will

This instruction is for the MA-500TR. See the MA-

’

s step.

the AIS target is displayed.

erwise, you cannot make an individual DSC call using the transponder.

mended order.

be speciﬁed by the coast station, therefore you cannot change the channel. The transponder will display “Voice Channel is speciﬁed by the Base station,” in this case.

Transponder’s display Transceiver’s display

e Push [DSC] to make an individual DSC call to the AIS tar-

get.

• If Channel 70 is busy, the transceiver stands by until the channel becomes clear.

• If the transceiver cannot make the call, the transponder will display “DSC Transmission FAILED.”

Transponder’s display Transceiver’s display

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 80

DSC OPERATION

[CLEAR]

 Making an Individual call using an AIS transponder (Continued)

r After making the individual DSC call, the transponder will

display “DSC Transmission COMPLETED.”

• Push [CLEAR] to return to the screen displayed before you entered the voice channel selection screen in step w.

• The transceiver stands by on Channel 70 until an acknowledgement is received.

‘Able to comply’ is received

‘Unable to comply’ is received

Transponder’s display Transceiver’s display

Step 2: Transceiver’s operation

t When the acknowledgement is received, alarm sounds.

 If the acknowledgement ‘Able to comply’ is received,

push [ALARM OFF] to stop the alarm, and then select the intership channel speciﬁed in step w.

• A different intership channel will be selected if the station you

called cannot use the channel.

• To reply, push [PTT] and speak at your normal voice level.

• You can check the MMSI code or the name, if entered, of the

AIS target on the display.

 If the acknowledgement ‘Unable to comply’ is received,

push [ALARM OFF] to stop the alarm, and then “INDIVIDUAL CALL FAILED” is displayed.

After the communication is ﬁnished, push [EXIT] to return to the normal operating mode.

[Y]

[Z]

[DSC]

TRANSPONDER

Page 81

OTHER FUNCTIONS

■ Using the Intercom

The optional Intercom function allows you to talk between the transceiver and the where the Command microphone is located. The optional HM-195 quired for Intercom operation. Connect the HM-195 page 89. While using the intercom:

• Transmitting is disabled.

• Received audio is muted. q Hold down [PWR](Dial) to turn ON the power.

• The command microphone power is automatically turned ON,

even if the mic power is OFF.

w Push [INCM] to enter the Intercom mode.

e Hold down [INCM CALL] to sound the intercom beeps.

• The transceiver and the command microphone sound beeps

while holding down [INCM CALL].

• “CALL” is displayed.

command microphone as described on

command microphone is re-

r After releasing [INCM CALL], hold down [PTT] and speak

into the microphone at your normal voice level.

• “TALK” is displayed on the caller’s display, and “LSTN” is displayed on the listener’s display.

•

Rotate dial to adjust the transceiver’s intercom volume level.

• Rotate [VOL/SQL](Dial) on the HM-195 to adjust the HM-195’s intercom volume level, .

t After releasing [PTT], you can hear the response through

the speaker.

On the caller’s display

On the listener’s display

Push [EXIT] to return to the normal operating mode.

While in the Intercom mode, the transmit and receive functions are disabled. When the transceiver is transmitting, the Intercom function is disabled.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 82

OTHER FUNCTIONS

■ Using the RX Speaker

The RX Speaker function enables you to hear the received audio through a PA speaker. Connect a PA speaker as described on page 84.

q Push

[RX ]

to enter the RX Speaker mode.

• The RX Speaker volume level adjustment screen is displayed.

w Rotate Dial or push [Y]/[Z]/[Ω]/[≈] to adjust the RX

Speaker volume level, and then push [ENT].

• “RX ” is displayed.

e Push

[RX ] to return to the normal operating mode.

• “RX ” disappears.

To adjust the audio output level in the RX Speaker mode, hold down volume level adjustment screen, and then rotate Dial. After adjusting, push [ENT] to set it.

[RX ] for 1 second to display

the RX Speaker

■ Using the PA (Public Address)

The transceiver has a PA function to make announcements through a PA speaker. Connect a PA speaker rated at tion with a 4 ˘ load,

• Transmitting is disabled while in the PA mode.

q Push [PA] to enter the Public Address mode.

w Hold down [PTT] and speak at your normal voice level.

• While holding down [PTT], the screen below is displayed.

• Rotate Dial or push [Y]/[Z]/[Ω]/[≈] to adjust the PA volume level.

e Push [EXIT] to return to normal operating screen.

While in the PA mode, the transmit and receive functions

are disabled. When the transceiver is transmitting, the PA function is disabled.

as described on page 84.

more than 10 W at 10% distor-

Page 83

OTHER FUNCTIONS

■ Using the Horn

The Horn function sounds a horn. Connect a PA speaker as described on page 84.

q Push [HORN] to enter the Horn mode.

w Hold down [HORN] to sound a horn.

• While holding down [HORN], the horn sounds, and the screen below is displayed.

• Rotate Dial or push [Y]/[Z]/[Ω]/[≈] to adjust the horn volume level.

e Push [EXIT] to return to the normal operating screen.

While in the Horn mode, the transmit and receive functions

are disabled. When the transceiver is transmitting, the Horn function is disabled.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 84

[ENT][Y]/[Z]

[CLEAR]

[MENU]

MENU SCREEN OPERATION

■ Using the Menu screen

The Menu screen is used for entering infrequently changed values, function settings or making DSC calls. In addition to this page, see pages 75 through 83 for details.

Menu lists

[EXIT] [ENT][BACK] Dial

Entering the Menu screen

Example: Set the channel group to “USA”

q Push [MENU].

w Rotate Dial or push [∫]/[√] to select

the root item (Radio Settings), and then push [ENT].

• If [∫] or [√] is continuously held down, the items are sequentially highlighted.

e Rotate Dial or push [∫]/[√] to select

“CHAN Group,” and then push [ENT].

r Rotate Dial or push [∫]/[√] to select

“USA,” and then push [ENT] to set it.

• “✔” is displayed next to “USA.”

Push [EXIT] to exit the Menu screen.

• Push [CLEAR] or [BACK] to return to the previous screen.

Page 85

MENU SCREEN OPERATION

■ Menu screen items

The Menu screen contains the following items.

D DSC Calls

Item Ref. Item Ref.

• Individual Call p. 32 •

• Individual ACK*

• Group Call p. 36

• All Ships Call p. 38 • Polling Request*

• Distress Call p. 26 • Test Call p. 45

• Distress Relay ACK*

• Received Call Log p. 63

p. 34

p. 30 • Test ACK*

Transmitted Call Log

• Position Request

•

Position Report*

D DSC Settings

Item Ref. Item Ref.

• Position Input*

• Individual ID p. 22 • CH 16 Switch p. 66

• Group ID p. 23 • Alarm p. 67

• Individual ACK p. 65 • CH 70 SQL Level p. 67

• Position ACK p. 65 • DSC Loop Test p. 68

Displayed only after receiving a corresponding call.

* *2 For only USA and Australian version transceivers. *3 Displayed only when no GPS information is received. *4 Displayed only when the optional HM-195 is connected. *5 For only USA version transceivers. *6 This setting may not be usable, depending on the transceiver ver-

sion or presetting.

p. 25 • Test ACK p. 65

p. 62

p. 39 p. 41 p. 43

p. 47

D Radio Settings

Item Ref. Item Ref.

• Scan Type p. 76 • WX Alert*

• Scan Timer p. 76 • RT Indicator*

• Dual/Tri-Watch p. 76

• CHAN Group p. 76

• CH Display

p. 77 p. 77 p. 77

D Conﬁguration

Item Ref. Item Ref.

• Backlight p. 78 • Noise Cancel p. 80

• Display Contrast p. 78 • Inactivity Timer p. 81

• Key Beep p. 78 • NMEA Output p. 82

• Key Assignment p. 78 • Remote ID p. 83

• UTC Offset p. 80 • COMMANDMIC SP*

p. 83

D MMSI/GPS Info

The transceiver shows the preset MMSI and ATIS*7 codes and GPS information* If the code is not entered, “NO DSC MMSI” or “NO ATIS MMSI”*

*7 Displayed only for the Dutch and German version transceivers. *8 Displayed only when an external or the built-in GPS receiver is

is displayed.

receiving valid position data.

Rotate

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 86

MENU SCREEN OPERATION

■ Radio Settings items

D Scan type

The transceiver has two scan types, Normal scan and Priority scan. A Normal scan searches all Favorite channels in the selected channel group. A Priority scan sequentially searches all Favorite channels, while monitoring Channel 16.

• The default setting is different depending on the transceiver versions.

D Scan resume timer

The scan resume timer can be selected as a pause (OFF) or timer scan (ON). When OFF is selected, the scan pauses until the signal disappears. (Default: OFF)

• Priority scan

• Normal scan When ON is selected, the scan pauses for 5

When ON is selected, the scan pauses for 5 seconds and then resumes, even if a signal has been received on any channel other than Channel 16.

seconds and then resumes, even if a signal has been received on any channel.

D Dual/Tri-watch

This item can be selected as Dualwatch or Tri-watch. (p. 21)

(Default: Dualwatch)

D Channel Group

Except for the European version, a channel group suitable for your operating area can be selected. Depending on the transceiver version, INT, USA, CAN, ATIS, or DSC may be selectable. See page 12 for details.

• The screen below shows the USA version.

Page 87

MENU SCREEN OPERATION

D Weather alert

(For only USA and Australian version transceivers) A NOAA broadcast station transmits a weather alert tone before important weather information. After the transceiver detects the alert, “WX transceiver is operated.

• “WX ” displayed instead of “WX” when the function is set ON.

ON with Scan: The preset weather channels are sequentially

checked while scanning.

ON: The previously selected (last used) weather

channel is checked while scanning.

OFF: The transceiver does not detect a weather

alert tone.

” blinks until the

(Default: OFF)

D RT Indicator

(For only USA version transceivers) Select weather or not to display RT (Radio Telephone) icon (p. 6) while in the Radio Telephone mode. (Default: ON)

D CH Display

You can select the number of digits to display the channel number. (Default: 4 Digits)

• This setting may not be usable, depending on the transceiver version or presetting.

3 Digits:

4 Digits:

The channel number is displayed in 3 digits, such as “01A.” The channel number is displayed in 4 digits, such as “1001.”

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 88

MENU SCREEN OPERATION

■ Conﬁguration items

D Backlight

The function display and keys can be backlit for better visibility under low light conditions. The backlight can be set to 7 levels and OFF. (Default: 7)

D Display contrast

This item adjusts the contrast of the LCD in 8 steps. Level 1 is the lowest contrast, and level 8 is the highest contrast. (Default: 5)

D Key Beep

You can turn OFF beep tones for silent operation, or you can turn ON the tones to have conﬁrmation beeps sound when a key is pushed. (Default: ON)

D Key Assignment

Desired functions can be assigned to Dial and the softkeys.

q When the “KEY ASSIGNMENT” screen is displayed, rotate

Dial or push [∫]/[√] to select “Dial” or “Softkeys,” and then push [ENT].

w Rotate Dial or push [∫]/[√] to select the desired position,

and then push [ENT].

• To return to the default, select “Set default” and push [ENT].

For “Dial” assignment For “Softkeys” assignment

e Rotate Dial or push [∫]/[√] to select the option, and then

push [ENT] to set it.

• “✔” is displayed next to the selected option.

For “Dial” assignment For “Softkeys” assignment*

* [CHAN] is displayed instead of [CH/WX] for the IC-M423, IC-

M423G, and IC-M423GE except for Australian version.

Page 89

MENU SCREEN OPERATION

r Push [EXIT] to exit the Menu screen.

• Push [CLEAR] or [BACK] to return to the previous screen.

• Dial assignment

The Audio volume (VOL), squelch (SQL), channel selection (CHAN), and LCD backlight level (Backlight) functions can be assigned to any one of 4 sequential positions on Dial. Pushing Dial 1 to 4 times sequentially selects the desired function, and rotating Dial adjusts the level or selects a value or number.

For example:

- VOL is assigned the 1st position, and pushing Dial once selects VOL. The VOL adjust screen is displayed and rotating Dial adjusts the audio volume.

- CH is assigned to the 3rd position, and pushing Dial three times selects CH. The channel number is displayed and rotating Dial will select the desired channel.

You can assign VOL, SQL, CH/WX of the 1st, 2nd, 3rd, or 4th sequential positions.

Repeatedly pushing Dial sequentially displays all the functions in the order they are assigned, and skips any functions assigned as Not Used.

* [CHAN] is displayed instead of [CH/WX] for the IC-M423, IC-

M423G, and IC-M423GE except for Australian version.

* and Backlight to any one

• Softkeys assignment

The desired function can be assigned as the softkey function. The assigned function can be used when its key icon is displayed. See page 3 through 4 for details of the assignable key functions.

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 90

MENU SCREEN OPERATION

■ Conﬁguration items (Continued)

D UTC Offset

Set the offset time between the UTC (Universal Time Coordinated) and your local time to between –14:00 and +14:00 (in 1 minute steps). (Default: 00:00)

D Noise Cancel

Set the Noise Cancel function for both receive and transmit.

When the “NOISE CANCEL” screen is displayed, rotate Dial or push [∫]/[√] to select “RX” or “TX,” and then push [ENT].

w Rotate Dial or push [∫]/[√] to select the option, and then

push [ENT] to set it.

• “✔” is displayed next to the selected option.

e Push [EXIT] to exit the Menu screen.

• Push [CLEAR] or [BACK] to return to the previous screen.

• RX

Turn the receive Noise Cancel function ON or OFF.

OFF : Turns OFF the function. (Default) 1 : The Noise Cancel function reduces random noise com-

ponents in the received signal to approximately one half.

2 : The Noise Cancel function reduces random noise com-

ponents in the received signal to approximately one third.

3 : The Noise Cancel function reduces random noise com-

ponents in the received signal to approximately one tenth.

• TX

Turn the transmit Noise Cancel function ON or OFF. OFF : Turns OFF the function. (Default) ON : The Noise Cancel function reduces random noise com-

ponents in the transmitted signal to one third.

Page 91

MENU SCREEN OPERATION

D Inactivity Timer

Set the inactivity timer to between 1 and 10 minutes (in 1 minute steps) or OFF for a “Not DSC Related” item, and set it to between 1 and 15 minutes (in 1 minute steps) or OFF for a “DSC Related” item. The count down alarm sounds 10 seconds before the Inactive timer returns the current screen to the normal operating screen.

q When the “INACTIVITY TIMER” screen is displayed, rotate

Dial or push [∫]/[√] to select “Not DSC Related” or “DSC Related,” and then push [ENT].

w Rotate Dial or push [∫]/[√] to select the option, and then

push [ENT] to set it.

• “✔” is displayed next to the selected option.

e Push [EXIT] to exit the Menu screen.

• Push [CLEAR] or [BACK] to return to the previous screen.

• Not DSC Related

When the LCD displays a screen other than the normal operation screen, or one not related to the DSC, and no key operation occurs for this set period, the transceiver automatically returns to the normal operating screen.

• DSC Related

When the LCD displays the screen related to DSC, and no key operation occurs for this set period, the transceiver automatically returns to the normal operating screen.

• RT Related (For only USA version transceivers) While receiving or transmitting a signal, and when the channel is changed, the RT (Radio Telephone) icon is displayed. The icon disappears if you push no key for the period of time set in the Menu screen shown below. (Default: 30 sec)

(Default: 10 min)

(Default: 15 min)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 92

MENU SCREEN OPERATION

■ Conﬁguration items (Continued)

D NMEA Output

Select the Data Output function option for a NMEA output port.

• POS data output (Default: OFF) When receiving position data from an external or the built-in GPS receiver,* this function sends the data from the NMEA Output port to an external device.

*For only the IC-M423G, IC-M423GE, and IC-M424G.

• DSC data output (Default: OFF) When receiving a DSC call, this function makes the transceiver send the DSC data from its NMEA Output port to an external device.

All Stations: Outputs the call from any vessel from the

NMEA Output port.

Station List: Outputs the call from any vessels listed on

the Individual ID screen.

OFF: Does not output any call to an external de-

vice.

Page 93

MENU SCREEN OPERATION

D Remote ID

Set a Remote ID number to between 1 and 69. The Remote ID is included in the sentence of the Icom original NMEA format. (Default: 15)

D COMMANDMIC Speaker

(Displayed only when the optional HM-195 is connected.) The HM-195’s external speaker can be used instead of the internal speaker. (Default: Internal Speaker)

• The “COMMANDMIC SP” screen is displayed on the HM-195’s display. Not displayed on the transceiver’s display.

Internal Speaker : Turns ON the internal speaker. (Default) External Speaker : Turns ON the external speaker.

Regardless of this setting, the supplied microphone’s speaker is ON.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 94

CONNECTIONS AND MAINTENANCE

■ Connections

•

The ﬁgure shows the IC-M423GE.

q ANTENNA CONNECTOR

Connects to a marine VHF antenna cable’s PL-259 con-

nector.

CAUTION: DO NOT transmit without an antenna.

w NMEA IN/OUT LEADS Brown: Talker B (Data-L), Data Out (–) White: Talker A (Data-H), Data Out (+)

Connect to NMEA input lines of navigation equipment, to

receive position data of other ships.

• A NMEA 0183 (ver. 2.0 or later) sentence format DSC or DSE compatible navigation equipment is required.

• The built-in GPS outputs RMC, GSA, GSV format sentences.

Green: Listener B (Data-L), GPS In (–) Yellow: Listener A (Data-H), GPS In (+)

Connect to NMEA output lines of a GPS receiver for posi-

tion data.

• A NMEA 0183 ver. 2.0 or later RMC, GGA, GNS, GLL, VTG, GSV, and GSA sentence format compatible GPS receiver is required. Ask your dealer about suitable GPS receivers.

• The GPS sentences input from an external GPS receiver have

priority over the sentences from the built-in GPS.

e AF OUT LEADS Blue: External Speaker (+) Black: External Speaker (–)

Connects to an external speaker.

Orange: Public Address Speaker (+) Gray: Public Address Speaker (–)

Connects to a PA speaker.

• PA output power: More than 10 W at 10% distortion into a 4 ˘ load

DO NOT connect the black or grey leads to the ground. These leads must be connected to the External speaker

(–) or Public Address Speaker (–) lines.

NOTE for NMEA In/Out and AF Out leads:

The connectors are attached to keep the leads together. Before connecting to a piece of equipment, you should cut the leads to remove the connector.

Page 95

CONNECTIONS AND MAINTENANCE

Rubber vulcanizing

r DC POWER CONNECTOR

Connects to a 13.8 V DC power source. (+: Red, –: Black)

CAUTION: After connecting the DC power cable, NMEA leads, external speaker leads, and PA speaker leads, cover the connector and leads with an vulcanizing tape, as shown below, to prevent water seeping into the connection.

tape

t GROUND TERMINAL

Connects to a vessel ground to prevent electrical shocks

and interference from other equipment occurring.

Use a PH M3 × 6 screw (user supplied).

NOTE for the IC-M423, IC-M423G, IC-M424, and ICM424G: The location of the ground terminal is the same

as the GPS antenna connector on the IC-M423GE.

y GPS ANTENNA CONNECTOR

Connects to the supplied GPS antenna. (For only the IC-

M423GE)

NOTE:

Be sure the GPS antenna is positioned where it has a clear view to receive signal from satellites, and ﬁxed using the supplied double-sided adhesive pad.

u COMMAND MICROPHONE JACK

Connects to the optional Command microphone. (p. 89)

D Connecting to the MA-500TR/MA-510TR

An Individual DSC call can be made to the AIS target using the transponder without entering the target’s MMSI code. See the transponder’s instruction manual for connection details.

Connect each lead to the appropriate lead of the OPC-2014 as follows.

• Listener A (Data-H) (Yellow): To lead 3.

• Listener B (Data-L) (Green): To lead 2.

• Talker A (Data-H) (White): To lead 5.

• Talker B (Data-L) (Brown): To lead 4.

NOTE: 510TR Instruction manual for the MA-510TR instructions.

This instruction is for the MA-500TR. See the MA-

’

s connecting

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 96

CONNECTIONS AND MAINTENANCE

■ Antenna

A key element in the performance of any communication system is the antenna. Ask your dealer about antennas and the best place to mount them.

■ Fuse replacement

One fuse is installed in the supplied DC power cable. If the fuse blows or the transceiver stops functioning, track down the source of the problem, repair it, and replace the damaged fuse with a new one of the proper rating.

Fuse rating: 10 A

■ Cleaning

If the transceiver becomes dusty or dirty, wipe it clean with a soft, dry cloth.

DO NOT use harsh solvents such as benzine or

alcohol, as they will damage the transceiver’s surfaces.

■ Supplied accessories

Mounting bracketFor mounting bracket

Knob bolts

Screws (5×20 mm)

Microphone hanger and screws (3×16 mm)

* Not supplied, or the type is different, depending on the trans-

ceiver’s versions.

DC power cable

GPS antenna and double-sided adhesive pad*

Flat washers (M5)

Spring washers (M5)

Page 97

CONNECTIONS AND MAINTENANCE

■ Mounting the transceiver

D Using the supplied mounting bracket

The universal mounting bracket supplied with your transceiver allows overhead or dashboard mounting.

q Mount the bracket securely to a surface which is more than

10 mm thick and can support more than 5 kg using the two supplied screws (5 × 20 mm).

w Attach the transceiver to the bracket so that the face of the

transceiver is at 90° to your line of sight when operating it. KEEP the transceiver and microphone at least 1 meter

away from the vessel’s magnetic navigation compass. NOTE: Check the installation angle; the function display

may not be easy-to-read at some angles.

NOTE for the IC-M423G and IC-M424G:

Built-in GPS receiver is located at the right top of the front panel. If the transceiver is covered with any object that interrupts the GPS signals from the satellites, the GPS receiver will not calculate its position. Therefore, when you use the built-in GPS receiver, be sure the transceiver is positioned so the GPS receiver has a clear view to receive signals from satellites.

NOTE for the IC-M423GE: Be sure the GPS antenna is positioned where the GPS antenna has a clear view to receive signal from satellites, and ﬁxed using the supplied double-sided adhesive pad.

• MOUNTING EXAMPLE

Built-in GPS receiver is located here. (For only IC-M423G and IC-M424G.)

These bolts are shown only a mounting example. (User supplied)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 98

CONNECTIONS AND MAINTENANCE

■ MB-132 installation

An optional MB-132 flush mount is available for mounting the transceiver to a ﬂat surface, such as an instrument panel.

KEEP the transceiver and microphone at least 1 meter away from your vessel’s magnetic navigation compass.

q Using the template on page 95, carefully cut a hole into

the instrument panel, or wherever you plan to mount the transceiver.

w Slide the transceiver through the hole, as shown below.

e Attach the clamps on either side of the transceiver with two

M5 × 8 mm supplied bolts.

• Make sure that the clamps align parallel to the transceiver body.

r Tighten the end bolts on the clamps (clockwise) so that the

clamps press ﬁrmly against the inside of the instrument control panel.

t Tighten the locking nuts (counterclockwise) so that the

transceiver is securely mounted in position, as shown below.

y Connect the antenna and power cable, then return the in-

strument control panel to its original place.

Page 99

CONNECTIONS AND MAINTENANCE

Mounting base Nut

■ Microphone installation

The optional HM-195 should be connected to the transceiver using the supplied OPC-1540 connection cable. The cable is used to operate from a longer distance. The cable connector can also be installed as a built-in plug on a cabinet or wall.

To operate from even longer distances, the optional 6 meter long OPC-1541 extension cable can be used between the transceiver and the OPC-1540. Up to two OPC-1541 can be added.

D Installation

q Insert the OPC-1540 cable connector into the command

microphone jack, and tighten the nut.

w To use the cable connector as a wall socket, install it as

described to the right.

e Using the mounting base as a template, carefully mark the

holes where the cable and three screws will be fastened. r Drill holes at these marks. t Install the mounting base using the supplied screws, as

shown below.

Gasket

Screw holes (approx. 2 (d) mm;

y The completed installation should look like this.

⁄32˝)

Cap

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Page 100

CONNECTIONS AND MAINTENANCE

Gasket

Mounting base

Nut

Cap

ICOM IC-M423, IC-M423G, IC-M423GE, IC-M424, IC-M424G INSTRUCTION MANUAL

Specifications and Main Features

Frequently Asked Questions

User Manual

PREFACE

IMPORTANT

EXPLICIT DEFINITIONS

IN CASE OF EMERGENCY

INSTALLATION NOTE

RADIO OPERATOR WARNING

AVERTISSEMENT POUR LES OPÉRATEURS RADIO

FCC INFORMATION

NOTE

INFORMATION FCC

PRECAUTIONS

PRÉCAUTIONS

TABLE OF CONTENTS

OPERATING RULES

PANEL DESCRIPTION

PREPARATION

BASIC OPERATION

SCAN OPERATION

DUALWATCH/TRI-WATCH

DSC OPERATION

MENU  DSC Calls  Transmitted Call Log (Push [MENU].)

MENU  DSC Calls  Received Call Log (Push [MENU].)

MENU  DSC Settings  

OTHER FUNCTIONS

MENU SCREEN OPERATION

CONNECTIONS AND MAINTENANCE