Icom IC-M421 User Manual

INSTRUCTION MANUAL

VHF MARINE TRANSCEIVER

iM421

FOREWORD

WORD

DEFINITION

RWARNING

CAUTION

NOTE

Personal injury, fire hazard or electric shock
may occur.

If disregarded, inconvenience only. No risk
of personal injury, fire or electric shock.

Equipment damage may occur.

IMPORTANT

Thank you for purchasing this Icom product. The IC-M421

VHF MARINE TRANSCEIVER

state of the art technology and craftsmanship. With proper
care, this product should provide you with years of trouble­free operation.

We want to take a couple of moments of your time to thank
you for making the IC-M421 your radio of choice, and hope
you agree with Icom’s philosophy of “technology first.” Many
hours of research and development went into the design of
your IC-M421.

D

❍ Built-in DSC meets ITU Class D require-

❍ Superior receiver performance
❍ Large 2-digit Ch with scrolling channel

❍ Rugged waterproof construction
❍ Easy to hear speaker

Icom, Icom Inc. and the logo are registered trademarks of Icom Incor­porated (Japan) in the United States, the United Kingdom, Germany, France,
Spain, Russia and/or other countries.

i

is designed and built with Icom’s

FEATURES

ment

comment

READ ALL INSTRUCTIONS carefully and completely

before using the transceiver.

SAVE THIS INSTRUCTION MANUAL — This in-

struction manual contains important operating instructions for
the IC-M421.

EXPLICIT DEFINITIONS

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

including salt water, otherwise, the keys and switches may
become inoperable due to salt crystallization.

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. Your call sign or other indication of the vessel (AND 9­digit DSC ID if you have one).

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

5. The nature of the distress and assistance required.

6. Any other information which might facilitate the rescue.

Or, transmit 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, push and hold
[DISTRESS] for 5 sec. until you hear 5 short beeps
change to one long beep.

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

• After the acknowledgment is received, Channel 16 is

automatically selected.

3. Push and hold [PTT], then transmit the appropriate
information as listed above.

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 that this installation height should
be at least 5 meters above ground (or accessible) level. 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 5 meters of
the antenna, nor operated at all if any person is touching the
antenna.

In all cases any possible risk depends on the transmitter
being activated for long periods. (actual recommendation lim­its are specified as an average of 6 minutes) Normally the
transmitter is not active for long periods of time. Some radio li­censes will require that a timer circuit automatically cuts the
transmitter after 1–2 minutes etc.

Similarly some types of transmitter, SSB, CW, AM, etc. have a
lower ‘average’ output power and the perceived risk is even
lower.

ii

DOC

DECLARATION

OF CONFORMITY

We Icom Inc. Japan

1-1-32, Kamiminami, Hirano-ku
Osaka 547-0003, Japan

Kind of equipment:

VHF MARINE TRANSCEIVER

This compliances is based on conformity with the following harmonised
standards, specifications or documents:
i)

EN 301 025-2 V1.2.1 (2004-09)

ii)

EN 301 025-3 V1.2.1 (2004-09)
iii) EN 60945 2002
iv) EN 60950-1 2001
v) EN 300 698-2 V1.1.1 ( 2000-08)
vi) EN 300 698-3 V1.1.1 ( 2001-05)

Type-designation: iM421

Signature

Declare on our sole responsibility that this equipment complies with the
essential requirements of the Radio and Telecommunications Terminal
Equipment Directive, 1999/5/EC, and that any applicable Essential Test
Suite measurements have been performed.

Version (where applicable):

0560

Authorized representative name

Place and date of issue

8th Mar. 2006

CE versions of the IC-M421 which display the
“CE” symbol on the serial number seal, com­ply with the essential requirements of the Eu­ropean Radio and Telecommunication
Terminal Directive 1999/5/EC.

This warning symbol indicates that this equip­ment operates in non-harmonised frequency
bands and/or may be subject to licensing condi­tions in the country of use. Be sure to check that
you have the correct version of this radio or the
correct programming of this radio, to comply with
national licensing requirement.

iii

TABLE OF CONTENTS

FOREWORD …………………………………………………………… i
IMPORTANT …………………………………………………………… i
EXPLICIT DEFINITIONS ……………………………………………… i
IN CASE OF EMERGENCY…………………………………………… ii
INSTALLATION NOTE ………………………………………………… ii
DOC …………………………………………………………………… iii
TABLE OF CONTENTS ……………………………………………… iv
PRECAUTION ………………………………………………………… v

1 OPERATING RULES ……………………………………………… 1
2 PANEL DESCRIPTION ………………………………………… 2–5

■ Panel description………………………………………………… 2

■ Function display ………………………………………………… 4

■ Microphone ……………………………………………………… 5

3 BASIC OPERATION ………………………………………… 6–10

■ Channel selection ……………………………………………… 6

■ Receiving and transmitting……………………………………… 8

■ Call channel programming……………………………………… 9

■ Channel comments …………………………………………… 10

■ Microphone lock function ……………………………………… 10

■ Display backlighting …………………………………………… 10

4 DUALWATCH/TRI-WATCH ……………………………………… 11

■ Description ……………………………………………………… 11

■ Operation ……………………………………………………… 11

5 SCAN OPERATION ………………………………………… 12–13

■ Scan types ……………………………………………………… 12

■ Setting tag channels …………………………………………… 13

■ Starting a scan ………………………………………………… 13

6 DSC OPERATION …………………………………………… 14–44

■ MMSI code programming……………………………………… 14

■ MMSI code check ……………………………………………… 15

■ DSC individual ID ……………………………………………… 16

■ Position and time programming ……………………………… 20

■ Position and time indication…………………………………… 21

■ Distress call …………………………………………………… 22

■ Transmitting DSC calls ………………………………………… 25

■ Receiving DSC calls …………………………………………… 37

■ Received messages …………………………………………… 41

■ DSC Set mode ………………………………………………… 43

7 SET MODE …………………………………………………… 45–46

■ Set mode programming ……………………………………… 45

■ Set mode items ………………………………………………… 45

8 CONNECTIONS AND MAINTENANCE …………………… 47–50

■ Supplied accessories ………………………………………… 47

■ Antenna ………………………………………………………… 47

■ Fuse replacement ……………………………………………… 47

■ Cleaning ………………………………………………………… 47

■ Connections …………………………………………………… 48

■ Mounting the transceiver ……………………………………… 49

■ Optional MB-69 installation …………………………………… 50

9 TROUBLESHOOTING …………………………………………… 51
10 CHANNEL LIST ……………………………………………… 52–53
11 SPECIFICATIONS AND OPTION ……………………………… 54

■ Specifications …………………………………………………… 54

■ Option …………………………………………………………… 54

12 TEMPLATE ……………………………………………………… 55
DIMENSIONS ………………………………………………………… 57

iv

PRECAUTION

RWARNING! NEVER connect the transceiver to an AC

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

NEVER connect the transceiver to a power source of more

than 16 V DC or use reverse polarity. This will ruin the trans­ceiver.

NEVER cut the DC power cable between the DC plug and

fuse holder. If an incorrect connection is made after cutting,
the transceiver may be damaged.

NEVER place the transceiver where normal operation of the

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

KEEP the transceiver at least 1 m away from the ship’s nav-

igation compass.

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

atures below –20°C or above +60°C or in areas subject to di­rect sunlight, such as the dashboard.

AVOID the use of chemical agents such as benzine or al-

cohol when cleaning, as they may damage the transceiver
surfaces.

BE CAREFUL! The transceiver rear panel will become

hot when operating continuously for long periods.

Place the transceiver in a secure place to avoid inadvertent
use by children.

BE CAREFUL! The transceiver and HM-150 employs wa-

terproof construction, which corresponds to JIS waterproof
specification, Grade 7 (1 m/30 min.). However, once the
transceiver or microphone has been dropped, waterproofing
cannot be guaranteed due to the fact that the case may be
cracked, or the waterproof seal damaged, etc.

v

OPERATING RULES

1

DD

PRIORITIES

• Read all rules and regulations pertaining to 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 signals are prohibited and pun­ishable by law.

DD

PRIVACY

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

• Indecent or profane language is prohibited.

DD

RADIO LICENSES

(1) SHIP STATION LICENSE

You must have a current radio station license before using the
transceiver. It is unlawful to operate a ship station which is not
licensed.

Inquire through 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.

The Restricted Radiotelephone Operator Permit must be
posted or kept with the operator. 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.

Keep a copy of the current government rules and regulations
handy.

1

1

2

Function
display (p. 4)Speaker

qi!0o

weuytr

PANEL DESCRIPTION

■ Panel description

q POWER/VOLUME CONTROL [VOL] (p. 8)

➥ Rotate to turn the transceiver power ON or OFF.
➥ Rotate to adjust the audio level.

w SQUELCH CONTROL [SQL] (p. 8)

Rotate to set the squelch threshold level.

2

e DISTRESS KEY [DISTRESS] (p. 22)

Transmits a distress call when pushed for 5 sec.

r ENTER KEY [ENT]

Sets the DSC menu, a channel comment, etc. when
pushed.

t CLEAR KEY [CLR]

Cancels the entered function and exits the condition when
pushed.

PANEL DESCRIPTION

2

y SCAN/TAG CHANNEL KEY [SCAN•TAG] (p. 13)

➥ Push to start and stop the normal or priority scan when

tag channels are programmed.

➥ Push for 1 sec. to set the displayed channel as a tag

(scanned) channel.

➥ While pushing [HI/LO] located on the microphone, push

for 3 sec. to clear or set all tag channels in the selected
channel group.

u CHANNEL UP/DOWN KEYS [▲]/[▼]•[U/I]

➥ Selects the operating channels, Set mode settings, etc.

when pushed. (pgs. 6, 45)

➥ Selects one of two channel groups in sequence when

both keys are pushed. (p. 7)

• International and U.S.A.* channels are available.
(*U.K. version only)

➥ While pushing [SCAN•TAG], push to adjust the bright-

ness of the LCD and key backlight. (p. 10)

i CHANNEL 16/CALL CHANNEL KEY [16•C]

➥ Selects Channel 16 when pushed. (p. 6)
➥ Selects call channel when pushed for 1 sec. (p. 6)
➥ Push for 3 sec. to enter the call channel programming

condition when the call channel is selected. (p. 9)

➥ While pushing [CH•DUAL], push to enter the channel

comment programming condition. (p. 10)

➥ While turning power ON, push to enter set mode. (p. 45)

o CHANNEL/DUALWATCH/TRI-WATCH KEY [CH•DUAL]

➥ Push to select the regular channel. (pgs. 6, 7)
➥ Push for 1 sec. to start dualwatch or tri-watch. (p. 11)
➥ Push to stop dualwatch or tri-watch when either is acti-

vated. (p. 11)

!0 DSC MENU KEY [MENU] (p. 14)

Toggles the DSC menu ON or OFF when pushed.

2

3

2 PANEL DESCRIPTION

BUSY-INT----
25W-DUP-TAG-
NORMAL-SCAN-

23 34.154N-

135 34.351E-

-CALLING UTC-12:00-

qw y

u

e

i

o

!1 !0

tr

■ Function display

q CHANNEL NUMBER READOUT

Indicates the selected operating channel number.

• “A” appears when a simplex channel is selected. (p. 7)

w POWER INDICATOR (p. 8)

➥ “25W” appears when high power is selected.
➥ “1W” appears when low power is selected.

e BUSY/TRANSMIT INDICATOR (p. 8)

➥ “BUSY” appears when receiving a signal or when the

squelch opens.

➥ “TX” appears while transmitting.

4

r DUPLEX INDICATOR (p. 7)

Appears when a duplex channel is selected.

• Duplex channel has a different transmit frequency and receiving
frequency.

t CHANNEL GROUP INDICATOR (p. 7)

Indicates whether an International “INT” or U.S.A. “USA”
channel is selected. (depends on version)

y TAG CHANNEL INDICATOR (p. 13)

Appears when a tag channel is selected.

u SCAN INDICATOR

➥ Either “NORMAL SCAN” or “PRI-SCAN 16” scan

type appears while scanning. (p. 13)

➥ “DUAL 16” appears during dualwatch; “TRI 16” ap-

pears during tri-watch. (p. 11)

i POSITION INDICATOR

➥ Shows the GPS position data.

•“??” may blink every 2 sec. instead of position data; when the

GPS position data is invalid. In such a case, the last position
data is held for up to 23.5 hours.

•“??” may blink every 2 sec. instead of position data 4 hours

after the position data is input manually, up until 23.5 hours
have past.

• A beep sounds automatically for 1 min. every 4 hours when
the GPS or manually input position data has not been up­dated.

➥ “No Position” appears when no GPS receiver is

connected and no position data is input manually.

o TIME ZONE INDICATOR

Microphone

w

q

e

➥ Shows the current time data when a GPS receiver is

connected.

➥ “No Time” appears when no GPS receiver is con-

nected and no time data is input manually.

➥ “Local” appears when the offset time data is set.

(p. 43)

!0 LOW BATTERY INDICATOR

“ ” blinks when the battery voltage drops to approx. 11 V
DC or below.

!1 CHANNEL COMMENT INDICATOR

Channel comment appears if programmed. (p. 10)

• More than 9-character comment scrolls automatically.

PANEL DESCRIPTION

■ Microphone

q PTT SWITCH [PTT]

Push and hold to transmit; release to receive. (p. 8)

2

2

w CHANNEL UP/DOWN KEYS [JJ]/[KK]

Push either key to change the operating memory channel,
set mode settings, etc. (pgs. 6, 45)

e TRANSMIT POWER KEY [HI/LO]

➥ Toggles power high and lower when pushed. (p. 8)

• Some channels are set to low power only.

➥ While pushing [HI/LO], turn power ON to toggle the mi-

crophone lock function ON and OFF. (p. 10)

5

3

Push

for 1 sec.

-INT----

25W--TAG-

-

23 34.154N-

135 34.351E-

CALLING - UTC-12:00-

Push

-INT----

25W--TAG-

-

23 34.154N-

135 34.351E-

CALLING - UTC-12:00-

BASIC OPERATION

■ Channel selection

6

DD

Channel 16

Channel 16 is the distress and safety channel. It is used for
establishing initial contact with another 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] momentarily to select Channel 16.
➥ Push [CH•DUAL] to return to the condition before selecting

Channel 16, or push [▲] or [▼] to select operating chan­nel.

DD

Call channel

Each regular channel group has a separate leisure-use call
channel. The call channel is monitored during tri-watch. The
call channels can be programmed (p. 9) and are used to store
your most often used channels in each channel group for
quick recall.
➥ Push [16•C] for 1 sec. to select the call channel of the se-

lected channel group.

• The call channel number appears.

• Each channel group may have an independent call channel after
programming a call channel.

➥ Push [CH•DUAL] to return to the condition before selecting

the call channel, or push [▲] or [▼] to select an operating
channel.

DD

Push both

and

U.S.A. channel*

International channel

-INT----

25W-DUP-TAG-

-

23 34.154N-

135 34.351E-

TELEPHON- UTC-12:00-

-USA----

25W--TAG-

-

23 34.154N-

135 34.351E-

- CCG - UTC-12:00-

Scrolls

International channels and U.S.A. channels*

The IC-M421 is pre-programmed with 57 International (INT)
channels in addition to 59 U.S.A. channels*. These channel
groups may be specified for the operating area.

q Push [CH•DUAL] to select a regular channel.
w Push both [▲] and [▼] on the transceiver to change the

channel group, if necessary.

• International and U.S.A.* channels can be selected in sequence.

e Push [▲] or [▼] to select a channel.

•“DUP” appears for duplex channels.

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

*U.K. version only

BASIC OPERATION

3

3

7

3 BASIC OPERATION

u

w

re

M

q

y

r

t

M: Microphone

■ Receiving and transmitting

CAUTION: Transmitting without an antenna may damage

the transceiver.

q Rotate [VOL] to turn power ON.
w Set the audio and squelch levels.

➥ Rotate [SQL] fully counterclockwise in advance.
➥ Rotate [VOL] to adjust the audio output level.
➥ Rotate [SQL] clockwise until the noise disappears.

While in the DSC operation, please make sure you set
the squelch correctly.

e To change the channel group, push both [▲] and [▼] on

the transceiver. (p. 7)

r Push [▲] or [▼] to select the desired channel. (pgs. 6, 7)

• When receiving a signal, “BUSY” appears and audio is emitted

from the speaker.

• Further adjustment of [VOL] may be necessary at this point.

t Push [HI/LO] on the microphone to select the output

power if necessary.

•“25W” or “1W” appears when high or low power is selected, re-

spectively.

• Choose low power for short range communications, and choose
high power for longer distance communications.

• Some channels are for low power only.

y Push and hold [PTT] to transmit, then speak into the mi-

crophone (M).

•“TX” appears.

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

u Release [PTT] to receive.

IMPORTANT: To maximize the readability of your trans-

mitted signal, pause a few sec. after pushing [PTT], hold
the microphone (M) 5 to 10 cm from your mouth and speak
at a normal voice level.

✔ NOTE for TOT (Time-out Timer) function

The TOT function inhibits continuous transmission over a pre­set time period after the transmission starts.
A beep sounds 10 sec. before the TOT function activates, to
indicate the transmission will be shut down and “TOT” ap-
pears on the channel comment indicator. Transmission is not
possible for 10 sec. after this transmission shut down.

8

■ Call channel programming

-INTINT----

25W25W-DUPDUP-TAGTAG-

-

2323 34.154N34.154N-

135135 34.351E34.351E-

- INTLINTL - UTCUTC-12:0012:00-

-INTINT----

25W25W--TAGTAG-
CALLCALL WRITEWRITE -

2323 34.154N34.154N-

135135 34.351E34.351E-

- INTLINTL - UTCUTC-12:0012:00-

CALLCALL WRITEWRITE

-INTINT----

25W25W--TAGTAG-

-

2323 34.154N34.154N-

135135 34.351E34.351E-

CALLINGCALLING - UTCUTC-12:0012:00-

-INTINT----

25W25W--TAGTAG-
CALLCALL WRITEWRITE -

2323 34.154N34.154N-

135135 34.351E34.351E-

CALLINGCALLING - UTCUTC-12:0012:00-

CALLCALL WRITEWRITE

-INTINT----

25W25W-DUPDUP-TAGTAG-

-

2323 34.154N34.154N-

135135 34.351E34.351E-

INTLINTL - UTCUTC-12:0012:00-

BASIC OPERATION

3

You can program the call channel with your most often-used
channel in each channel group for quick recall.

q Push both [▲] and [▼]

on the transceiver to se­lect the desired channel
group (International and
U.S.A.*) to be pro­grammed.

*U.K. version only

w Push [16•C] for 1 sec.

to select the call chan­nel of the selected
channel group.

• The call channel number
appears.

e Push [16•C] again for

3 sec. (until a long beep
changes to 2 short
beeps) to enter the call
channel programming
condition.

• Channel number and
“CALL WRITE” start
blinking.

r Push [▲] or [▼] to se-

lect the desired chan­nel.

3

t Push [16•C] to program

the displayed channel
as the call channel.

• Push [CH•DUAL] to can­cel.

• The channel number and
“CALL WRITE” stop
blinking.

9

3 BASIC OPERATION

[HI/LO]

[J]/[K]

■ Channel comments

Memory channels can be labelled with alphanumeric com­ments of up to 10 characters each for easy channel recogni­tion.
More than 9 characters comment scrolls automatically at the
channel comment indicator after the channel selection.

Capital letters, small letters, numerals, some symbols (- . /)
and space can be used.

q Select the desired memory channel.

• Cancel dualwatch, tri-watch or scan in advance.

w While pushing [CH•DUAL], push [16•C] to edit the channel

comment.

• A cursor and the first character start blinking alternately.

e Select the desired character by pushing [▲] or [▼].

• Push [CH•DUAL] or [16•C] to move the cursor forward or back­ward, respectively.

r Repeat step e to input all characters.
t Push [ENT] to set the comment.

• Push [CLR] to cancel.

• The cursor disappears.

y Repeat steps q to t to program other channel com-

ments, if desired.

■ Microphone lock function

The microphone lock function electrically locks [Y]/[Z] and
[HI/LO] keys on the supplied microphone. This prevents ac-

cidental channel changes and function access.
➥ While pushing [HI/LO] on the microphone, turn power ON

to toggle the lock function ON and OFF.

■ Display backlighting

The function display and keys can be backlit for better visibil­ity under low light conditions.
➥ While pushing [SCAN•TAG], push [Y] or [Z] to adjust the

brightness of the LCD and key backlight.

• The backlight is selectable in 3 levels and OFF.

10

DUALWATCH/TRI-WATCH

BUSYBUSY-INT----
25W25W-DUPDUP-TAGTAG-
TRITRI 1616 -

23 34.154N34.154N-

135135 34.351E34.351E-

TELEPHONTELEPHON- UTCUTC-12:0012:00-

BUSYBUSY-INT----
25W25W--TAG-
TRITRI 1616 -

23 34.154N34.154N-

135135 34.351E34.351E-

INTLINTL - UTCUTC-12:0012:00-

-INTINT----

25W25W-DUPDUP-TAGTAG-
TRITRI 1616 -

23 34.154N34.154N-

135135 34.351E34.351E-

TELEPHONTELEPHON- UTCUTC-12:0012:00-

-INTINT----

25W25W-DUPDUP-TAGTAG-
TRITRI 1616 -

23 34.154N34.154N-

135135 34.351E34.351E-

TELEPHONTELEPHON- UTCUTC-12:0012:00-

Tri-watch starts.

Signal is received on call
channel.

Signal is received on
Channel 16 takes priority.

Tri-watch resumes after
the signal disappears.

Call channel

Dualwatch Tri-watch

4

■ Description

Dualwatch monitors Channel 16 while you are receiving an­other channel; tri-watch monitors Channel 16 and the call
channel while receiving another channel.

DUALWATCH/TRI-WATCH SIMULATION

• If a signal is received on Channel 16, dualwatch/tri-watch

pauses 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 dualwatch/tri-

watch, push and hold [PTT].

■ Operation

q Select Dualwatch or Tri-watch in set mode. (p. 46)
w Push [▲] or [▼] to select the desired operating channel.
e Push [CH•DUAL] for 1 sec. to start Dualwatch or Tri-watch.

•“DUAL 16” appears during dualwatch; “TRI 16” appears dur-

ing tri-watch.

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

r To cancel Dualwatch or Tri-watch, push [CH•DUAL] again.

[Example]: Operating tri-watch on INT channel 25.

3
4

11

5

CH 01 CH 02

CH 06

CH 05 CH 04

CH 03

CH 06

CH 01

CH 16

CH 02

CH 05 CH 04

CH 03

SCAN OPERATION

■ Scan types

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

PRIORITY SCAN

Priority scan searches through all tag channels in se­quence while monitoring Channel 16. When a signal is de­tected on Channel 16, scan pauses until the signal disap­pears; when a signal is detected on a channel other than
Channel 16, scan becomes dualwatch until the signal dis­appears.

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

Choose priority or normal scan in set mode. (p. 45)

NORMAL SCAN

Normal scan, like priority scan, searches through all tag
channels in sequence. However, unlike priority scan, Chan­nel 16 is not checked unless Channel 16 is set as a tag
channel.

12

SCAN OPERATION

[Example]: Starting a normal scan.

-INTINT----

25W25W-DUPDUP-TAGTAG-

-

2323 34.154N34.154N-

135135 34.351E34.351E-

- INTLINTL - UTCUTC-12:0012:00-

-INTINT----

25W25W-DUPDUP-TAGTAG-
NORMALNORMAL SCANSCAN-

2323 34.154N34.154N-

135135 34.351E34.351E-

--UTCUTC-12:0012:00-

BUSYBUSY-INTINT----
25W25W-DUPDUP-TAGTAG-
NORMALNORMAL SCANSCAN-

2323 34.154N34.154N-

135135 34.351E34.351E-

- INTLINTL - UTCUTC-12:0012:00-

Push

Scan starts. When a signal is received.

5

■ Setting tag channels

For more efficient scanning, add the desired channels as tag
channels or clear the tag for unwanted channels.
Channels are not tagged will be skipped during scanning. Tag
channels can be assigned to each channel group (Interna­tional and U.S.A.*) independently.

q Push both [▲] and [▼] to select the desired channel group

(International and U.S.A.*).

w Select the desired channel to be set as a tag channel.
e Push [SCAN•TAG] for 1 sec. to set the displayed channel

as a tag channel.

•“TAG” appears in the display.

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

•“TAG” disappears.

✔ Clearing (or setting) all tagged channels

While pushing [HI/LO] on the microphone, push [SCAN•TAG]
for 3 sec. (until a long beep changes to 2 short beeps) to clear
all tag channels in the channel group.

• Repeat above procedure to set all tag channels.

■ Starting a scan

Set scan type (priority or normal scan) and scan resume timer
in advance using set mode. (p. 45)

q Push [▲] and [▼] to select the desired channel group (In-

ternational and U.S.A.*) if desired.

w Set tag channels as described at left.
e Make sure the squelch is closed to start a scan.
r

Push [SCAN•TAG] to start priority or normal scan.

•“PRI-SCAN 16” or “NORMAL SCAN” appears in the function

display.

• When a signal is detected, scan pauses until the signal disap­pears or resumes after pausing 5 sec. according to set mode
setting. (Channel 16 is still monitored during priority scan.)

• Push [▲] or [▼] to check the scanning tag channels, to change
the scanning direction or resume the scan manually.

• A beep tone sounds and “16” blinks when a signal is received
on Channel 16 during priority scan.

t To stop the scan, push

*U.K. version only

[SCAN•TAG]

.

5

13

6

--DSC Menu-­MMSI Check
Input 9 digits

_________

<CLR˘Exit / ENT˘OK>

--DSC Menu-­Set up
DEL:INDV ID ≤
DEL:Group ID
Offset Time

˘MMSI Check ≥

--DSC Menu--

Select Item

Position Input
Received Calls

˘Set up

Exit

DSC OPERATION

■ MMSI code programming

14

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

This code programming can be performed only once.

q Turn power OFF.
w While pushing [MENU], turn power ON to enter MMSI

code programming condition.

e After the display appears, release [MENU].
r Push [MENU] again to enter the DSC menu.
t Push [▲] or [▼] to select “Set up,” push [ENT].

y Push [▲] or [▼]

to select “MMSI Check,” push

[ENT]

.

u Push [▲] or [▼]

•

Push [CH•DUAL] or [16•C] to move the cursor forward or back­ward, respectively.

• Push [SCAN•TAG] to clear the MMSI code.

• Push [CLR] to cancel and exit the condition to the set up menu.

i After input the 9-digit code, push [ENT] to set the code.

• Returns to the set up menu.

o Push [CLR] or [▼] to select “Exit,” push [ENT].

• Returns to the DSC menu.

• Repeat again to return to the normal operation condition.

to set

the specific 9-digit MMSI code.

■ MMSI code check

--DSC Menu--

MMSI Check

123456789

<CLR˘Exit>

--DSC Menu-­Set up
DEL:INDV ID ≤
DEL:Group ID
Offset Time

˘MMSI Check ≥

--DSC Menu--

Select Item

Polling Request ≤
Received Calls
Distress Setting

˘Set up ≥

DSC OPERATION

6

The 9-digit MMSI (DSC self ID) code can be checked.

q Push [MENU] to enter the DSC menu.
w Push [▲] or [▼] to select “Set up,” and push

e Push [▲] or [▼]

r Check the 9-digit MMSI (DSC self ID) code.

to select “MMSI Check,” push [ENT].

[ENT]

t Push [CLR] or [▼] to select “Exit,” push [ENT].

• Returns to the DSC menu.

• Repeat again to return to the normal operation condition.

.

6

15

6 DSC OPERATION

--DSC Menu--

Add:Individual ID
Input name

__________

<CLR˘Exit / ENT˘OK>

--DSC Menu-­Add:Individual ID
Input 9 digits

_________

<CLR˘Exit / ENT˘OK>

--DSC Menu--

Set up

˘Add:INDV ID

Add:Group ID
DEL:INDV ID
DEL:Group ID ≥

--DSC Menu--

Select Item

Polling Request ≤
Received Calls
Distress Setting

˘Set up ≥

■ DSC individual ID

16

A total of 100 DSC address IDs can be programmed and
named with up to 10 characters.

DD

Programming Address ID

q Push [MENU] to enter the DSC menu.
w Push [▲] or [▼] to select “Set up,” and push [ENT].

e Push [▲] or [▼]

r Push [▲] or [▼]

• Push [CH•DUAL] or [16•C] to move the cursor forward or back-
ward, respectively.

• Push [SCAN•TAG ] to clear the ID.

• Push [CLR] to cancel and exit the condition to the set up menu.

• “Full ID” appears when 100 DSC address IDs are already
set.

to select “Add:INDV ID,” push

to s

et the individual ID.

[ENT]

1st digit ‘0’ is fixed for a group ID. When you input 1st digit ‘0’
and other 8 digits, the ID is automatically registered as a group
ID.

t After input the 9-digit code, push [ENT] to set up to a 10-

character ID name using [▲] or [▼].

• Push [CH•DUAL] or [16•C] to move the cursor forward or back-
ward, respectively.

.

• Push [SCAN•TAG] to clear the ID name.

• Push [CLR] to cancel and exit the condition to the set up menu.

y Push [ENT] to program.
u Push [CLR] or [▼] to select “Exit,” push [ENT].

• Returns to the DSC menu.

• Repeat again to return to the normal operation condition.

DD

--DSC Menu-­Select ID
Bob
John

˘Cindy ≥

<CLR˘Exit / ENT˘OK>

--DSC Menu-­Set up
Add:INDV ID
Add:Group ID

˘DEL:INDV ID

DEL:Group ID ≥

--DSC Menu--

Select Item

Polling Request ≤
Received Calls
Distress Setting

˘Set up ≥

Deleting address ID

q Push [MENU] to enter the DSC menu.
w Push [▲] or [▼] to select “Set up,” and push [ENT].

DSC OPERATION

r Push [▲] or [▼] to select the desired ID name for delet-

ing.

6

6

e Push [▲] or [▼]

• When no address ID is programmed, “
Push [CLR] to exit the condition.

to select “DEL:INDV ID,” push

No ID

[ENT]

” is displayed.

t Push [ENT] to delete the address ID and returns to the set

.

up menu.

y Push [CLR] or [▼] to select “Exit,” push [ENT].

• Returns to the DSC menu.

• Repeat again to return to the normal operation condition.

17

6 DSC OPERATION

--DSC Menu-­Add:Group ID
Input name

__________

<CLR˘Exit / ENT˘OK>

--DSC Menu-­Add:Group ID
Input 8 digits

0________

<CLR˘Exit / ENT˘OK>

--DSC Menu-­Set up
Add:INDV ID

˘Add:Group ID

DEL:INDV ID
DEL:Group ID ≥

--DSC Menu--

Select Item

Polling Request ≤
Received Calls
Distress Setting

˘Set up ≥

DD

Programming Group ID

q Push [MENU] to enter the DSC menu.
w Push [▲] or [▼] to select “Set up,” and push [ENT].

e Push [▲] or [▼]

[ENT]

.

to select “Add:Group ID,” push

t After input the 8-digit code, push [ENT] to input up to a 10-

character ID name using [▲] or [▼].

• Push [CH•DUAL] or [16•C] to move the cursor forward or back-
ward, respectively.

• Push [SCAN•TAG] to clear the ID name.

• Push [CLR] to cancel and exit the condition to the set up menu.

18

r Push [▲] or [▼]

• 1st digit ‘0’ is fixed for a group ID.

• Push [CH•DUAL] or [16•C] to move the cursor forward or back-
ward, respectively.

• Push [SCAN•TAG ] to clear the ID.

• Push [CLR] to cancel and exit the condition to the set up menu.

• “Full ID” appears when 100 DSC address IDs are already
set.

to s

et the Group ID.

y Push [ENT] to program.
u Push [CLR] or [▼] to select “Exit,” push [ENT].

• Returns to the DSC menu.

• Repeat again to return to the normal operation condition.

DD

--DSC Menu-­Select ID
Office
Icom

˘Station A ≥

<CLR˘Exit / ENT˘OK>

--DSC-Menu-­Set up
Add:INDV ID
Add:Group ID
DEL:INDV ID

˘DEL:Group ID ≥

--DSC Menu--

Select Item

Polling Request ≤
Received Calls
Distress Setting

˘Set up ≥

Deleting group ID

q Push [MENU] to enter the DSC menu.
w Push [▲] or [▼] to select “Set up,” and push [ENT].

DSC OPERATION

r Push [▲] or [▼] to select the desired ID name for delet-

ing.

6

6

e Push [▲] or [▼]

[ENT]

.

• When no group ID is programmed, “
[CLR] to exit the condition.

to select “DEL:Group ID,” push

No ID

” is displayed. Push

t Push [ENT] to delete the group ID and returns to the set

up menu.

y Push [CLR] or [▼] to select “Exit,” push [ENT].

• Returns to the DSC menu.

• Repeat again to return to the normal operation condition.

19

6 DSC OPERATION

--DSC Menu-­Input Position
Longitude

___ __.___W Null

<SCAN˘Null Data>

<CLR˘Exit / ENT˘OK>

--DSC Menu-­Input Position
Latitude

__ __.___N Null

<SCAN˘Null Data>

<CLR˘Exit / ENT˘OK>

--DSC Menu-­Select Item
˘Position Input

Individual Call
Group Call
All Ships Call ≥

■

Position and time programming

20

A distress call should include the ship’s position and time
data. If no GPS is connected, your position and UTC (Univer­sal Time Coordinated) time should be input manually. They
are included automatically when a GPS receiver (NMEA0183
ver. 2.0 or 3.01) is connected.

q Push [MENU] to enter the DSC menu.
w Push [▲] or [▼ ] to select “Position Input,” and

push [ENT].

e The position information appears. Set your latitude data

using [▲] or [▼]. After setting the latitude data, push [ENT]
to set your

• Push [CH•DUAL] or [16•C] to move the cursor forward or back-
ward, respectively.

• Push [▲ ] or [▼] to edit N; North latitude or S; South latitude
when the cursor is on the ‘N’ or ‘S’ position, and W; West longi­tude or E; East longitude when the cursor is on the ‘W’ or ‘E’ po­sition.

• Push [SCAN•TAG] to clear the latitude/

• Push [CLR] to cancel and exit the condition to the DSC menu.

longitude data

Set the latitude data

Set the longitude data

.

longitude

data.

DSC OPERATION

INT

25W TAG

23 34.154N

135 34.351E

CALLING UTC 12:00

--DSC Menu--

Input UTC Time

__:__ Null

<SCAN˘Null Data>

<CLR˘Exit / ENT˘OK>

■ Position and Time indication

6

r After setting the longitude data, push [ENT] to set the time

information appears. Set the current UTC time with [▲] or
[▼], then push [ENT].

• Push [CH•DUAL] or [16•C] to move the cursor forward or back-
ward, respectively.

• Push [SCAN•TAG ] to clear the UTC time data.

• Push [CLR] to cancel and exit the condition to the DSC menu.

t Push [CLR] or [▼] to select “Exit,” push [ENT].

• Returns to the DSC menu.

• Repeat again to return to the normal operation condition.

Manually programmed position data will be held for 23.5
hours only.
“??” may blink instead of position and time indications
when the GPS data is invalid, or has not been manually
updated after 4 hours.

When a GPS receiver (NMEA0183 ver. 2.0 or 3.01) is con­nected, the transceiver displays the current position and time.
When no GPS receiver is connected, the transceiver displays
the manually entered position and time.

A GPS receiver appropriate for the IC-M421 is not supplied
from Icom. A GPS receiver with NMEA0183 ver. 2.0 or 3.01
format is required for position indication. Ask your dealer
about suitable GPS receivers.

When connecting GPS receiver is compatible with several
sentence formatters, the order of input precedence is
‘RMC,’ ‘GGA,’ ‘GNS’ and ‘GLL.’

6

21

6 DSC OPERATION

INT
25W TAG
RCV DTRS ACK
<Osaka Bay
<CLR˘

CALLING Beep Off>

Distress Call

TX Completed

Now Waiting for ACK

<CLR˘Cancel>

INT

25W TAG

Wait ACK

<CLR˘

CALLING Cancel>

After 2 sec.

Distress Call

Push for 5 sec.

■ Distress call

22

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

NEVER USE THE DISTRESS CALL WHEN YOUR
SHIP OR A PERSON IS NOT IN AN EMERGENCY.
A DISTRESS CALL CAN BE USED ONLY WHEN
IMMEDIATE HELP IS NEEDED.

DD

Simple call

q Confirm no distress call is being received.
w While lifting up the key cover, push [DISTRESS] for

5 sec. to transmit the distress call.

• Emergency channel (Ch 70) is automatically selected and the
distress call is transmitted.

• When no GPS is connected, input your position and UTC time, if
possible.

• While pushing [DISTRESS], the key backlighting is blinking.

e After transmitting the distress call, the transceiver waits for

an acknowledgment call on Ch 70.

• The distress call is automatically transmitted every 3.5 to 4.5
minutes.

• After 2 sec., the transceiver is set to Channel 16 automatically.

r After receiving the acknowledgment, reply using the mi-

crophone.

DSC OPERATION

--DSC Menu--

Select Nature

Undesignated

˘Explosion

Flooding ≥
<CLR˘Exit / ENT˘OK>

--DSC Menu-­Select Item

˘Position Report ≤

Polling Request
Received Calls

˘Distress Setting ≥

6

➥ A distress alert contains (default);

• Nature of distress: Undesignated distress

• Position data : GPS or manual input position data held for

23.5 hrs or until the power is turned OFF.

➥ The distress call is repeated every 3.5–4.5 min., until re-

ceiving an ‘acknowledgement.’

➥ Push [CLR] to cancel the ‘Call repeat’ mode.
➥ “??” may blink instead of position and time indications

when the GPS data is invalid, or has not been manually
updated after 4 hours.

DD

Normal call

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

q Push [MENU] to enter the DSC menu.
w Push [▲] or [▼] to select “Distress Setting,” and

push [ENT].

e Push [▲] or [▼] to select the nature of the distress, push

[ENT].

• ‘Undesignated,’ ‘Explosion,’ ‘Flooding,’ ‘Collision,’ ‘Grounding,’
‘Capsizing,’ ‘Sinking,’ ‘Adrift (Disable adrift),’ ‘Abandoning (Aban­doning ship),’ ‘Piracy (Piracy attack),’ and ‘MOB (Man over­board)’ are available.

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

6

23

6 DSC OPERATION

Distress Call

TX Completed

Now Waiting for ACK

<CLR˘Cancel>

INT

25W TAG

Wait ACK

<CLR˘

CALLING Cancel>

After 2 sec.

--DSC Menu--

Input UTC Time

__:__ Null

<SCAN˘Null Data>

<CLR˘Exit / ENT˘OK>

--DSC Menu-­Input Position
Longitude

___ __.___W Null

<SCAN˘Null Data>

<CLR˘Exit / ENT˘OK>

--DSC Menu-­Input Position
Latitude

__ __.___N Null

<SCAN˘Null Data>

<CLR˘Exit / ENT˘OK>

24

When a GPS receiver (NMEA0183 ver. 2.0 or 3.01) is con­nected,
ming) do not appear. Go to step y.

r The position information appears. Set your latitude data

using [▲] or [▼]. After setting the latitude data, push [ENT]
to set your

• Push [CH•DUAL] or [16•C] to move the cursor forward or back-

• Push [▲ ] or [▼] to edit N; North latitude or S; South latitude

• Push [SCAN•TAG ] to clear the latitude/

• Push [CLR] to cancel and exit the condition to the DSC menu.

next steps r, t (

longitude data

ward, respectively.

when the cursor is on the ‘N’ or ‘S’ position, and W; West longi­tude or E; East longitude when the cursor is on the ‘W’ or ‘E’ po­sition.

Set the latitude data

Current position/time program-

.

longitude

data.

Set the longitude data

t After setting the

rent UTC time using [▲] or [▼], then push [ENT].

• Push [CH•DUAL] or [16•C] to move the cursor forward or back-
ward, respectively.

• Push [SCAN•TAG] to clear the UTC time data.

• Push [CLR] to cancel and exit the condition to the DSC menu.

y Push [DISTRESS] for 5 sec. to transmit the distress call.

• While pushing [DISTRESS], the key backlighting is blinking.

u After transmitting the distress call, the transceiver waits for

an acknowledgment call on Ch 70.

• The distress call is automatically transmitted every 3.5 to 4.5 min.

• After 2 sec., the transceiver is set to Channel 16 automatically.

longitude

data, push [ENT] to set the cur-

DSC OPERATION

--DSC Menu-­Select Address

˘Manual Input

Bob

˘John ≥

<CLR˘Exit / ENT˘OK>

--DSC Menu-­Select Item

˘Position Input

˘Individual Call

Group Call
All Ships Call ≥

INT
25W TAG
RCV DTRS ACK
<Osaka Bay
<CLR˘

CALLING Beep Off>

6

i After receiving the acknowledgment, reply using the mi-

crophone.

➥ A distress alert contains (default);

• Nature of distress: Selected nature of the distress

• Position data : GPS or manual input position data held for

23.5 hrs or until the power is turned OFF.

➥ The distress call is repeated every 3.5–4.5 min., until re-

ceiving an ‘acknowledgement.’

➥ Push [CLR] to cancel the ‘Call repeat’ mode.
➥ “??” may blink instead of position and time indications

when the GPS data is invalid, or has not been manually
updated after 4 hours.

■ Transmitting DSC calls

To ensure correct operation of the DSC function, please
make sure you set the squelch correctly. (p. 8)

DD

Transmitting an individual call

The individual call function allows you to transmit a DSC sig­nal to a specific ship only.

q Push [MENU] to enter the DSC menu.
w Push [▲] or [▼] to select “Individual Call,” and

push [ENT].

e Push [▲] or [▼] to select the desired pre-programmed in-

dividual address or “Manual Input,” push [ENT].

• The ID code for the individual call can be set in advance. (p. 16)

• When “Manual Input” is selected, set the 9-digit ID code

for the individual you wish to call with [▲] or [▼].

1st digit ‘0’ is fixed for a group ID.

6

25

6 DSC OPERATION

-INT----

25W--TAG-
RCV INDV ACK
<John -
<CLR˘ -

COMMERCI Beep Off> -

‘Able to comply’ is received.

-INT----

25W--TAG-
RCV Unable
<John -
<CLR˘ -

INTL Beep Off> -

‘Unable to comply’ is received.

--DSC Menu--

Individual Call

TX Completed

Now Waiting for ACK

<CLR˘Exit>

Transmitting

--DSC Menu--

Individual Call

--DSC Menu-­Select Intership CH
˘08

69
77 ≥
<CLR˘Exit / ENT˘OK>

--DSC Menu--

Individual Call Ready

<CLR˘Exit / ENT˘OK>

Push

26

r Push [▲] or [▼] to select a desired intership channel or

“Manual Input,” push [ENT].

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

t Push [ENT] to transmit the 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 re-

ceived.

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

the specified channel (in step r) is selected with beeps
automatically. Or, when the acknowledgement ‘Unable to
comply’ is received, the display returns to the operated
channel (before enter the DSC menu) with beeps.

i Push [CLR] to stop the beep, then push and hold [PTT] to

communicate your message to the responding ship.

DD

--DSC Menu--

Select Action

˘Able to Comply

Unable to Comply

<CLR˘Exit / ENT˘OK>

--DSC Menu--

Individual Call Ready

<CLR˘Exit / ENT˘OK>

Push

--DSC Menu-­Select Address
˘John 01

Beck 02
Bob 03≥
<CLR˘Exit / ENT˘OK>

--DSC Menu-­Select Item

Position Input
Individual Call

˘Individual ACK

Group Call ≥

Transmitting an individual acknowledgement

When receiving an individual call, you can transmit an ac­knowledgement (‘Able to comply’ or ‘Unable to comply’) by
using the on screen prompts (see page 38 for details). Alter­natively, you can send an acknowledgement through the
menu system as follows.

q Push [MENU] to enter the DSC menu.
w Push [▲] or [▼ ] to select “Individual ACK,” and

push [ENT].

•“Individual ACK” item appears after an individual call is

received.

DSC OPERATION

r Push [▲] or [▼] to select that you can comply to the call or

not from “Able to Comply” or “Unable to Com-
ply,” then push [ENT].

• When “Unable to Comply” is selected, the reason “No

Reason Given” will be transmitted.

6

6

e Push [▲] or [▼] to select the desired individual address or

ID code, push [ENT].

t Push [ENT] to transmit the acknowledgement call to the

selected station.

y After the individual acknowledgement call has been trans-

mitted, the specified channel (specified by the calling sta­tion) is selected automatically when “Able to Com-
ply” is selected, or returns to the previous condition
(before entering the DSC menu) when “Unable to
Comply” is selected in step r.

27

6 DSC OPERATION

--DSC Menu--

Group Call

TX Completed

<CLR˘Exit>

--DSC Menu-­Select Intership CH
˘08

69
77 ≥
<CLR˘Exit / ENT˘OK>

--DSC Menu--

Group Call Ready

<CLR˘Exit / ENT˘OK>

Push

--DSC Menu-­Select Address

Manual Input

˘Office

Icom ≥
<CLR˘Exit / ENT˘OK>

--DSC Menu-­Select Item

˘Position Input

Individual Call

˘Group Call

All Ships Call ≥

DD

Transmitting a group call

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

q Push [MENU] to enter the DSC menu.
w Push [▲] or [▼] to select “Group Call,” and push

[ENT].

28

e Push [▲] or [▼] to select the desired pre-programmed

group address or “Manual Input,” push [ENT].

• The ID code for the group call can be set in advance. (p. 18)

• When “Manual Input” is selected, set the 8-digit ID code

for the group you wish to call with [▲] or [▼].

r Push [▲] or [▼] to select a desired intership channel or

“Manual Input,” push [ENT].

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

t Push [ENT] to transmit the 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 in-

dication is displayed.

u Push [CLR] to exit the condition and selects the specified

intership channel in step r automatically.

• Even if [CLR] hasn’t been pushed, the transceiver selects the
specified intership channel in step r automatically after 2 sec. of
inactivity.

DD

--DSC Menu--

All Ships Call

TX Completed

<CLR˘Exit>

--DSC Menu--

All Ships Call

Transmitting

--DSC Menu-­Select Category
˘Safety

Urgency

<CLR˘Exit / ENT˘OK>

--DSC Menu--

All Ships Call Ready

<CLR˘Exit / ENT˘OK>

Push

--DSC Menu-­Select Item

˘Position Input

Individual Call
Group Call

˘All Ships Call ≥

Transmitting an all ships call

Large ships use Channel 70 as their ‘listening channel.’ When
you want to announce a message to these ships, use the all
ships call function.

q Push [MENU] to enter the DSC menu.
w Push [▲] or [▼] to select “All Ships Call,” and

push [ENT].

e Push [▲] or [▼] to select the desired category, push

[ENT].

• The selectable category may differ according to the programmed
setting. Ask your dealer for the available categories.

DSC OPERATION

r Push [ENT] to transmit the all ships call.

• Channel 70 is selected and the all ships call is transmitted.

t After the all ships call has been transmitted, the following

indication is displayed.

6

6

y Push [CLR] to exit the condition and selects Channel 16

automatically.

• Even if [CLR] hasn’t been pushed, the transceiver automatically
selects Channel 16 after 2 sec. of inactivity.

29

6 DSC OPERATION

--DSC Menu--

Position Request

TX Completed

Now Waiting for ACK

<CLR˘Exit>

Transmitting

--DSC Menu--

Position Request

--DSC Menu-­Select Address

˘Manual Input

Bob

˘John ≥

<CLR˘Exit / ENT˘OK>

--DSC Menu--

POS Request Ready

<CLR˘Exit / ENT˘OK>

Push

--DSC Menu-­Select Item

˘Individual Call ≤

Group Call
All Ships Call

˘Position Request ≥

DD

Transmitting a position request call

Transmit a position request call when you want to know a
specific ship’s current position, etc.

q Push [MENU] to enter the DSC menu.
w Push [▲] or [▼] to select “Position Request,” and

push [ENT].

e Push [▲] or [▼] to select the desired pre-programmed in-

dividual address or “Manual Input,” push [ENT].

• The ID code can be set in advance. (p. 16)

• When “Manual Input” is selected, set the 9-digit ID code

for the individual you wish to call with [▲] or [▼].

r Push [ENT] to transmit the position request call.

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

t After the position request call has been transmitted, the fol-

lowing indication is displayed.

30

y Push [CLR] to return to the previous indication before en-

tering the DSC menu.

• Even if [CLR] hasn’t been pushed, the display automatically re­turns to the previous indication after 2 sec. of inactivity.

DD

--DSC Menu-­Input Position
Longitude

___ __.___W Null

<SCAN˘Null Data>

<CLR˘Exit / ENT˘OK>

--DSC Menu-­Input Position
Latitude

__ __.___N Null

<SCAN˘Null Data>

<CLR˘Exit / ENT˘OK>

--DSC Menu-­Select Address

˘Manual Input

Bob

˘John ≥

<CLR˘Exit / ENT˘OK>

--DSC Menu-­Select Item

˘Group Call ≤

All Ships Call
Position Request

˘Position Report- ≥

Transmitting a position report call

Transmit a position report call when you want to announce
your own position to a specific ship and to get an answer, etc.

q Push [MENU] to enter the DSC menu.
w Push [▲] or [▼] to select “Position Report,” and

push [ENT].

e Push [▲] or [▼] to select the desired pre-programmed in-

dividual address or “Manual Input,” push [ENT].

• The ID code can be set in advance. (p. 16)

• When “Manual Input” is selected, set the 9-digit ID code

for the individual you wish to call with [▲] or [▼].

DSC OPERATION

When a GPS receiver (NMEA0183 ver. 2.0 or 3.01) is con­nected,
ming) do not appear. Go to step y.

r The position information appears. Set your latitude data

using [▲] or [▼]. After setting the latitude data, push [ENT]
to set your

• Push [CH•DUAL] or [16•C] to move the cursor forward or back-

• Push [▲ ] or [▼] to edit N; North latitude or S; South latitude

• Push [SCAN•TAG] to clear the latitude/

• Push [CLR] to cancel and exit the condition to the DSC menu.

next steps r, t (

longitude data

ward, respectively.

when the cursor is on the ‘N’ or ‘S’ position, and W; West longi­tude or E; East longitude when the cursor is on the ‘W’ or ‘E’ po­sition.

Set the latitude data

Current position/time program-

.

longitude

data.

6

6

Set the longitude data

31

6 DSC OPERATION

--DSC Menu--

Position Report

TX Completed

Now Waiting for ACK

<CLR˘Exit>

--DSC Menu--

Position Report

Transmitting

--DSC Menu--

Input UTC TIme

__:__ Null

<SCAN˘Null Data>

<CLR˘Exit / ENT˘OK>

--DSC Menu--

POS Report Ready

<CLR˘Exit / ENT˘OK>

Push

32

t After setting the longitude data, push [ENT] to set the time

information appears. Set the current UTC time with [▲] or
[▼], then push [ENT].

• Push [CH•DUAL] or [16•C] to move the cursor forward or back-
ward, respectively.

• Push [SCAN•TAG] to clear the UTC time data.

• Push [CLR] to cancel and exit the condition to the DSC menu.

y Push [ENT] to transmit the position report call.

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

becomes clear.

u After the position report call has been transmitted, the fol-

lowing indication is displayed.

i Push [CLR] to return to the previous indication before en-

tering the DSC menu.

• Even if [CLR] hasn’t been pushed, the display automatically re­turns to the previous indication after 2 sec. of inactivity.

DD

--DSC Menu--

Polling Request

TX Completed

Now Waiting for ACK

<CLR˘Exit>

Transmitting

--DSC Menu--

Polling Request

--DSC Menu-­Select Address

˘Manual Input

˘Bob

John ≥
<CLR˘Exit / ENT˘OK>

--DSC Menu--

POLL Request Ready

<CLR˘Exit / ENT˘OK>

Push

--DSC Menu-­Select Item

˘All Ships Call ≤

Position Request
Position Report

˘Polling Request ≥

Transmitting a polling request call

Transmit a polling request call when you want to know a spe­cific ship is in the communication area, etc.

q Push [MENU] to enter the DSC menu.
w Push [▲] or [▼] to select “Polling Request,” and

push [ENT].

e Push [▲] or [▼] to select the desired pre-programmed in-

dividual address or “Manual Input,” push [ENT].

• The ID code can be set in advance. (p. 16)

• When “Manual Input” is selected, set the 9-digit ID code

for the individual you wish to call with [▲] or [▼].

DSC OPERATION

r Push [ENT] to transmit the polling request call.

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

t After the polling request call has been transmitted, the fol-

lowing indication is displayed.

6

6

y Push [CLR] to return to the previous indication before en-

tering the DSC menu.

• Even if [CLR] hasn’t been pushed, the display automatically re­turns to the previous indication after 2 sec. of inactivity.

33

6 DSC OPERATION

--DSC Menu-­Input Position
Longitude

___ __.___W Null

<SCAN˘Null Data>

<CLR˘Exit / ENT˘OK>

--DSC Menu-­Input Position
Latitude

__ __.___N Null

<SCAN˘Null Data>

<CLR˘Exit / ENT˘OK>

--DSC Menu-­Select Address
˘Paul 01

Beck 02
John 03≥
<CLR˘Exit / ENT˘OK>

--DSC Menu-­Select Item

Group Call
All ships Call
Position Request

˘Position Reply ≥

DD

Transmitting a position reply call

Transmit a position reply call when a position request call is
received.

q Push [MENU] to enter the DSC menu.
w Push [▲] or [▼ ] to select “Position Reply,” and

push [ENT].

•“Position Reply” item appears after a position request

call is received.

e Push [▲] or [▼] to select the desired individual address or

ID code, push [ENT].

When a GPS receiver (NMEA0183 ver. 2.0 or 3.01) is con­nected,
ming) do not appear. Go to step y.

r The position information appears. Set your latitude data

using [▲] or [▼]. After setting the latitude data, push [ENT]
to set your

• Push [CH•DUAL] or [16•C] to move the cursor forward or back-

• Push [▲ ] or [▼] to edit N; North latitude or S; South latitude

• Push [SCAN•TAG] to clear the latitude/

• Push [CLR] to cancel and exit the condition to the DSC menu.

next steps r, t (

longitude data

ward, respectively.

when the cursor is on the ‘N’ or ‘S’ position, and W; West longi­tude or E; East longitude when the cursor is on the ‘W’ or ‘E’ po­sition.

Set the latitude data

Current position/time program-

.

longitude

data.

34

Set the longitude data

t After setting the longitude data, push [ENT] to set the time

--DSC Menu-­Select Address
˘Paul 01

Beck 02
John 03≥

--DSC Menu--

POS Reply Ready

<CLR˘Exit / ENT˘OK>

Push

--DSC Menu-­Select Item

All ships Call
Position Request
Position Report

˘POS Report Reply ≥

--DSC Menu--

Input UTC TIme

__:__ Null

<SCAN˘Null Data>

<CLR˘Exit / ENT˘OK>

--DSC Menu--

POS Reply Ready

<CLR˘Exit / ENT˘OK>

Push

information appears. Set the current UTC time with [▲] or
[▼], then push [ENT].

• Push [CH•DUAL] or [16•C] to move the cursor forward or back-
ward, respectively.

• Push [SCAN•TAG ] to clear the UTC time data.

• Push [CLR] to cancel and exit the condition to the DSC menu.

DSC OPERATION

DD

Transmitting a position report reply call

Transmit a position report reply call when a position report call
is received.

q Push [MENU] to enter the DSC menu.
w Push [▲] or [▼] to select “POS Report Reply,” and

push [ENT].

•“POS Report Reply” item appears after a position report

call is received.

e Push [▲] or [▼] to select the desired individual address or

ID code, push [ENT].

6

6

y Push [ENT] to transmit the position reply call to the se-

lected station.

• Your position data is transmitted, when [ENT] is pushed.

r Push [ENT] to transmit the position report reply call to the

selected station.

35

6 DSC OPERATION

--DSC Menu-­Select Address
˘Paul 01

Beck 02
John 03≥
<CLR˘Exit / ENT˘OK>

--DSC Menu--

POLL Reply Ready

<CLR˘Exit / ENT˘OK>

Push

--DSC Menu-­Select Item

Position Request
Position Report
Polling Request

˘Polling Reply ≥

DD

Transmitting a polling reply call

Transmit a polling reply call when a polling request call is re­ceived.

q Push [MENU] to enter the DSC menu.
w Push [▲] or [▼] to select “Polling Reply,” and push

[ENT].

•“Polling Reply” item appears after a polling request call

is received.

e Push [▲] or [▼] to select the desired individual address or

ID code, push [ENT].

r Push [ENT] to transmit the polling request call to the se-

lected station.

36

■ Receiving DSC calls

INT
25W TAG
RCV DTRS REL
<Bob
<CLR˘

CALLING Beep Off>

INT
25W TAG
RCV DTRS ACK
<Beck
<CLR˘

CALLING Beep Off>

INT
25W TAG
RCV DISTRESS
<Paul
<CLR˘

CALLING Beep Off>

DSC OPERATION

6

DD

Receiving a distress call

While monitoring Channel 70 and a distress call is received:
➥ The emergency alarm sounds for 2 minutes.

• Push [CLR] to stop the alarm.

➥ “RCV DISTRESS” appears in the display, then Channel

16 is automatically selected.

➥ Continue monitoring Channel 16 as a coast station may re-

quire assistance.

DD

Receiving a distress acknowledgement

While monitoring Channel 70 and a distress acknowledge­ment to other ship is received:
➥ The emergency alarm sounds for 2 minutes.

• Push [CLR] to stop the alarm.

➥ “RCV DTRS ACK” appears in the display, then Channel

16 is automatically selected.

DD

Receiving a distress relay call

While monitoring Channel 70 and a distress relay acknowl­edgement is received:
➥ The emergency alarm sounds for 2 minutes.

• Push [CLR] to stop the alarm.

➥ “RCV DTRS REL” appears in the display, then Channel

16 is automatically selected.

6

37

6 DSC OPERATION

INT
25W TAG
RCV ALL SHIP
<Tokyo Bay
<CLR˘

SAFETY Beep Off>

INT
25W TAG
RCV GROUP
<Icom
<CLR˘

SAFETY Beep Off>

INT
25W TAG
RCV INDV
<Paul
<CLR˘

SAFETY Beep Off>

DD

Receiving an individual call

While monitoring Channel 70 and an individual call is re­ceived:
➥ The emergency alarm or beeps sound depending on the

received category.

➥ “RCV INDV” appears in the display.
➥ Push [CLR] to stop the beep, then push [ENT] to reply the

call and select the channel specified by the calling station
for voice communication (depending on your replying con­dition see p. 27 for individual acknowledgement call proce­dure for details.); push [CLR] to ignore the individual call.

DD

Receiving a group call

While monitoring Channel 70 and a group call is received:
➥ The emergency alarm or beeps sound depending on the

received category.

➥ “RCV GROUP” appears in the display.
➥ Push [CLR] to stop the beep, then push [ENT] to select

the channel specified by the calling station for voice com­munication; push [CLR] to ignore the group call.

DD

Receiving an all ships call

While monitoring Channel 70 and an all ships call is received:
➥ The emergency alarm sounds when the category is ‘Dis-

tress’ or ‘Urgency’; beeps sound for 2 minutes.

➥ “RCV ALL SHIP” appears in the display.
➥ Push [CLR] to stop the beep, then push [ENT] to monitor

channel 16 for an announcement from the calling vessel,
push [CLR] to ignore the call.

38

DSC OPERATION

INT
25W TAG
RCV POS RPT
<Paul
<CLR˘

SAFETY Beep Off>

INT
25W TAG
RCV POS REQ
<Paul
<CLR˘

SAFETY Beep Off>

INT
25W TAG
RCV GEOGRAPH
<Osaka Bay
<CLR˘

SAFETY Beep Off>

6

DD

Receiving a geographical area call

While monitoring Channel 70 and a geographical area call
(for the area you are in) is received:
➥ Emergency alarm or beeps sound depending on the re-

ceived category.

➥ “RCV GEOGRAPH” appears in the display.

➥ Push [CLR] to stop the beep, then push [ENT] to change

to the channel specified by the calling station for voice
communication; push other key to ignore the Geographi­cal Area call.

➥ Monitor the selected channel for an announcement from

the calling station.
When no GPS receiver is connected or if there is a prob­lem with the connected receiver, all geographical area calls
are received, regardless of your position.

DD

Receiving a position request call

While monitoring Channel 70 and a position request call is re­ceived:

➥ “RCV POS REQ” appears in the display.
➥ Push [CLR] to stop the beep, then push [ENT] to reply to

the position request call; push [CLR] to ignore the position
request call.

DD

Receiving a position report call

While monitoring Channel 70 and a position report call is re­ceived:

➥ “RCV POS RPT” appears in the display.
➥ Push [CLR] to stop the beep, then push [ENT] to reply to

the position report call; push [CLR] to ignore the position
report call.

6

39

6 DSC OPERATION

INT
25W TAG
RCV POS RPY
<Paul
<CLR˘

SAFETY Beep Off>

INT
25W TAG
RCV POS RPY
<Paul
<CLR˘

SAFETY Beep Off>

INT
25W TAG
RCV POLL REQ
<Paul
<CLR˘

SAFETY Beep Off>

DD

Receiving a polling request call

While monitoring Channel 70 and a polling request call is re­ceived:

➥ “RCV POLL REQ” appears in the display.
➥ Push [CLR] to stop the beep, then push [ENT] to reply to

the call; push [CLR] to ignore the call.

DD

Receiving a position reply call

While monitoring Channel 70 and a position reply call is re­ceived:

➥ “RCV POS RPY” appears in the display.
➥ Push [CLR] to stop the beep, then push [ENT] to display

the position information; push [CLR] to ignore the reply
call.

DD

Receiving a position report reply call

While monitoring Channel 70 and a position report reply call
is received:

➥ “RCV POS RPY” appears in the display.
➥ Push [CLR] to stop the beep, then push [ENT] to display

the position information; push [CLR] to ignore the reply
call.

40

■ Received messages

--DSC Menu-­Distress
<Beck
Explosion
LAT: 12 34.567N
LON:123 45.678W
UTC:12:15
<CLR˘Exit / SCAN˘Del>

--DSC Menu--

Select Message

˘12:15 Beck 01

09:10 John 02

<CLR˘Exit / ENT˘OK>

--DSC Menu--

Select Message

˘Distress

Other

<CLR˘Exit / ENT˘OK>

--DSC Menu-­Select Item

˘Position Request ≤

Position Report
Polling Request

˘Received Calls ≥

DSC OPERATION

6

The transceiver automatically stores up to 20 distress mes­sages and 20 other messages. The messages can be used
as an assistance to the logbook.

q Push [MENU] to enter the DSC menu.
w Push [▲] or [▼ ] to select “Received Calls,” and

push [ENT].

DD

Distress message

q Push [▲] or [▼] to select “Distress,” push [ENT].

w Push [▲] or [▼] to scroll to the desired message, push

[ENT].

• Messages which are blinking have not read.

6

e Push [▲] or [▼] to scroll the message.

r Push [CLR] to exit the condition or push [SCAN] to delete

the displayed message and returns to DSC menu.

41

6 DSC OPERATION

--DSC Menu-­Individual Call
<Bob
Routine
F3E simplex
CH08
<CLR˘Exit / SCAN˘Del>

--DSC Menu--

Select Message

All Ships Call 01
Group Call 02

˘Individual Call 03≥

<CLR˘Exit / ENT˘OK>

--DSC Menu-­Select Message
Distress

˘Other

<CLR˘Exit / ENT˘OK>

DD

Other messages

q Push [▲] or [▼] to select “Other,” push [ENT].

w Push [▲] or [▼] to scroll to the desired message, push

[ENT].

• Messages which are blinking have not read.

e Push [▲] or [▼] to scroll the message.

• The stored message has various information and depending on
the type of distress call.

r Push [CLR] to exit the condition or push [SCAN] to delete

the displayed message and returns to DSC menu.

42

■ DSC Set mode

--DSC Menu--

Input Offset TIme

__0:00

<CLR˘Exit / ENT˘OK>

--DSC Menu--

Input Offset TIme

-12:00

<CLR˘Exit / ENT˘OK>

No offset time (default)

12 hours

--DSC-Menu-­Set up
Add:Group ID ≤
DEL:INDV ID
DEL:Group ID

˘Offset Time ≥

--DSC Menu--

Select Item

Polling Request ≤
Received Calls
Distress Setting

˘Set up ≥

DSC OPERATION

6

DD

MMSI code check (See p. 15 for detail)

DD

Add Address ID (See p. 16 for detail)

DD

Delete Address ID (See p. 17 for detail)

DD

Offset time

This item sets the offset time from the UTC (Universal Time
Coordinated) time.

q Push [MENU] to enter the DSC menu.
w Push [▲] or [▼] to select “Set up,” and push [ENT].

e Push [▲] or [▼]

to select “Offset Time,” push

[ENT]

r Set the offset time from the UTC (Universal Time Coordi-

nated) time using [▲] or [▼].

• Push [CH•DUAL] or [16•C] to move the cursor forward or back-
ward, respectively.

• Push [SCAN•TAG] to clear the offset time data.

• Push [CLR] to cancel and exit the condition to the set up menu.

6

.

t Push [ENT] to program and to exit the condition to the set

up menu.

The local time indication is not available when the GPS re­ceiver (sentence formatter RMC) is connected, the trans­ceiver’s display indicates UTC time only.

43

6 DSC OPERATION

--DSC Menu-­Auto ACK
˘ON

OFF

<CLR˘Exit / ENT˘OK>

--DSC Menu--

Set up
DEL:Group ID ≤
Offset Time
MMSI Check

˘Auto ACK ≥

--DSC Menu-­Select Item

Polling Request ≤
Received Calls
Distress Setting

˘Set up ≥

DD

Automatic acknowledgement

This item sets the automatic acknowledgement function ON
or OFF.
When a position request, position report or polling request call
is received, transceiver automatically transmits a position re­quest reply, position report reply or polling reply call, respec­tively.

q Push [MENU] to enter the DSC menu.
w Push [▲] or [▼] to select “Set up,” and push [ENT].

r Push [▲] or [▼]

function ON or OFF

t Push [ENT] to set the condition.

• Push [CLR] to cancel and exit the condition to the set up menu.

to turn the

.

automatic acknowledgement

44

e Push [▲] or [▼]

to select “Auto ACK,” push

[ENT]

.

SET MODE

Beep tone

BeepBeep

Scan type

Scan TypeScan Type

Scan resume timer

Scan TimerScan Timer

Dual/tri watch

Dual/TriDual/Tri

Backlight

BacklightBacklight

LCD contrast

ContrastContrast

:Push

:Push

• SET MODE CONSTRUCTION

--Set Mode--

˘Scan Type

Scan Timer
Dual/Tri
Beep
Backlight
Contrast
Exit

--Set Mode-­Scan Timer

ON

˘OFF

<ENT˘OK>

Scan timer OFF (default)

--Set Mode-­Scan Type
˘Priority

Normal

<ENT˘OK>

Priority scan (default)

7

■ Set mode programming

Set mode is used to change the conditions of the trans­ceiver’s functions: scan type (normal or priority), scan resume
timer, dual/tri-watch, transceiver’s beep tone, backlight and
LCD contrast.

Available functions may differ depending on dealer setting.

q Turn power OFF.
w While pushing [16•C], turn power ON to enter set mode.
e After the display appears, release [16•C].
r Push [▲] or [▼] to select the desired item, push [ENT].
t Push [▲] or [▼] to select the desired condition of the item,

y Push [▼] to select “Exit,” then push [ENT] or push [CLR]

push [ENT].

to exit set mode and returns to normal operation condition.

■ Set mode items

DD

Scan type

The transceiver has 2 scan types: normal scan and priority
scan. Normal scan searches all tag channels in the selected
channel group. Priority scan searches all tag channels in se­quence while monitoring Channel 16.

DD

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. When ON is selected, the scan
pauses 5 sec. and resumes even if a signal has been re­ceived on any other channel than Channel 16.

6
7

45

7 SET MODE

--Set Mode-­Contrast

6 ≤
5

˘4 ≥

<ENT˘OK>

LCD contrast level 4 (default)

--Set Mode-­Backlight
˘Max

Mid
Min ≥

<ENT˘OK>

LCD backlight level MAX (default)

--Set Mode--

Beep

˘ON

OFF

<ENT˘OK>

Beep tone ON (default)

--Set Mode-­Dual/Tri

Tri-watch

˘Dualwatch

<ENT˘OK>

Dualwatch (default)

46

DD

Dual/Tri-watch

Select the watch function from Dualwatch or tri-watch. (p. 11)

DD

Beep tone

You can select the silent operation by turning beep tones
OFF, or you can have confirmation beeps sound at the push
of a key by turning beep tones ON.

DD

Backlight

The LCD backlight level can be adjusted from OFF, Min
(dark), Mid and Max (bright).

DD

LCD contrast

This item adjusts the contrast of the LCD in 8 steps. 1 is the
lowest contrast, and 8 is the highest contrast.

CONNECTIONS AND MAINTENANCE

Fuse rating: 10 A

q

er o

tu

i

y

w

8

■ Supplied accessories

The following accessories are supplied:

q Mounting bracket ………………………………………… 1
w DC power cable (OPC-891) ……………………………… 1
e Microphone hanger ……………………………………… 1
r Knob bolts for mounting bracket ………………………… 2
t Screws for mounting bracket (5 × 20) ………………… 2
y Mic hanger screws (3 × 16) ……………………………… 2
u Flat washers for mounting bracket (M5) ……………… 2
i Spring washers for mounting bracket (M5) …………… 2
o RCA connector cable (OPC-1278) ……………………… 1

Qty.

■ Antenna

A key element in the performance of any communication sys­tem is an antenna. Ask your dealer about antenna and the
best place to mount them.

■ Fuse replacement

One fuse is installed in the supplied DC power cable. If a fuse
blows or the transceiver stops functioning, track down the
source of the problem, if possible, and replace the damaged
fuse with a new, rated one.

■ Cleaning

If the transceiver becomes dusty or dirty, wipe it clean with a
soft, dry cloth.

AVOID the use of solvents such as benzene or al­cohol, as they may damage transceiver surfaces.

7
8

47

8 CONNECTIONS AND MAINTENANCE

Rubber vulcanizing tape

NMEA (+)

RCA

NMEA (–)

e

q

w

r

■ Connections

q DC POWER CONNECTOR

Connects the supplied DC power cable from this connector
to an external 12 V battery.

w EXTERNAL SPEAKER JACK

Connects to an external speaker.

r ANTENNA CONNECTOR

Connects a marine VHF antenna with a PL-259 connector
to the transceiver.

CAUTION: Transmitting without an antenna may dam­age the transceiver.

CAUTION: After connecting the DC power cable, GPS re­ceiver jack and external speaker jack, cover the connector
and jacks with an adhesive tape as shown below, to pre­vent water seeping into the transceiver.

48

e GPS RECEIVER JACK

Connects to a GPS receiver for position indication.

• A NMEA0183 ver. 2.0 or 3.01 (sentence formatters RMC, GGA,
GNS, GLL) compatible GPS receiver is required. Ask your dealer
about suitable GPS receivers.

Flat washer

Spring
washer

Screw

(5 × 20 mm)

EXAMPLE

■ Mounting the transceiver

DD

Using the supplied mounting bracket

The universal mounting bracket supplied with your transceiver
allows overhead or dashboard mounting.

• Mount the transceiver securely with the 2 supplied screws

(5 × 20) to a surface which is more than 10 mm thick and

can support more than 5 kg.

• Mount the transceiver so that the face of the transceiver is at
90° to your line of sight when operating it.

CAUTION: KEEP the transceiver and microphone at least
1 meter away from your vessel’s magnetic navigation com­pass.

NOTE: Check the installation angle; the function display
may not be easy-to-read at some angles.

CONNECTIONS AND MAINTENANCE

8

8

49

8 CONNECTIONS AND MAINTENANCE

■ Optional MB-69 installation

An optional MB-69
transceiver to a flat surface such as an instrument panel.

CAUTION: KEEP the transceiver and microphone at least
1 meter away from your vessel’s magnetic navigation com­pass.

q Using the template on p. 55, 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.

FLUSH MOUNT

is available for mounting the

e Attach the clamps on either side of the transceiver with 2

supplied bolts (5 × 8 mm).

• Make sure that the clamps align parallel to the transceiver body.

r Tighten the end bolts on the clamps (rotate clockwise) so

that the clamps press firmly against the inside of the in­strument control panel.

t Tighten the locking nuts (rotate counterclockwise) so that

the transceiver is securely mounted in position as below.

y Connect the antenna and power cable, then return the in-

strument control panel to its original place.

50

TROUBLESHOOTING

PROBLEM POSSIBLE CAUSE SOLUTION REF.

The transceiver does
not turn ON.

No sound from speaker. • Squelch level is too high.

Transmitting is impossi­ble, or high power can
not be selected.

Scan does not start. • “TAG” channel is not programmed. • Set the desired channels as “TAG” channels. p. 13

No beeps. • Beep tones are turned OFF.

Distress call cannot be
transmitted.

• Bad connection to the power supply. p. 48• Check the connection to the transceiver.

• Set squelch to the threshold point.

• Volume level is too low.

• Speaker has been exposed to water.

• Some channels are for low power or re­ceive only.

• The output power is set to low.

• The squelch is open.

• MMSI (DSC self ID) code is not pro­grammed.

• Set [VOL] to a suitable level.

• Drain water from the speaker.

• Change channels.

• Push [HI/LO] on the microphone to select
high power.

• Turn the beep tone ON in Set mode.

• Set squelch to the threshold point.

• Program the MMSI (DSC self ID) code. p. 14

p. 8
p. 8

pgs. 6,
7, 52, 53
p. 8

p. 46
p. 8

9

—

8
9

51

10

• International channels

CH

Frequency (MHz)

CH

Frequency (MHz)

CH

Frequency (MHz)

CH

Frequency (MHz)

CH

Frequency (MHz)

CH

Frequency (MHz)

Transmit Receive Transmit Receive Transmit Receive Transmit Receive Transmit Receive Transmit Receive

01 156.050 160.650 11 156.550 156.550 21 157.050 161.650 61 156.075 160.675 71 156.575 156.575 81 157.075 161.675

02 156.100 160.700 12 156.600 156.600 22 157.100 161.700 62 156.125 160.725 72 156.625 156.625 82 157.125 161.725

03 156.150 160.750 13 156.650 156.650 23 157.150 161.750 63 156.175 160.775 73 156.675 156.675 83 157.175 161.775

04 156.200 160.800 14 156.700 156.700 24 157.200 161.800 64 156.225 160.825 74 156.725 156.725 84 157.225 161.825

05 156.250 160.850 15*

1

156.750 156.750 25 157.250 161.850 65 156.275 160.875 75*3156.775 156.775 85 157.275 161.875

06 156.300 156.300 16 156.800 156.800 26 157.300 161.900 66 156.325 160.925 76*

3

156.825 156.825 86 157.325 161.925

07 156.350 160.950 17*1156.850 156.850 27 157.350 161.950 67 156.375 156.375 77 156.875 156.875 87 157.375 157.375

P4*

2

161.425 161.425

88 157.425 157.425

08 156.400 156.400 18 156.900 161.500 28 157.400 162.000 68

69

156.425 156.425 78 156.925 161.525

09 156.450 156.450 19 156.950 161.550 37A*

2

157.850 157.850 156.475 156.475 79 156.975 161.575

10 156.500 156.500 20 157.000 161.600 60 156.025 160.625 70 156.525 156.525 80 157.025 161.625

†

Receive only

*2 UK Marina Channels: M1=37A (157.850 MHz), M2=P4 (161.425 MHz) for U.K. version only

*

1

Channels 15 and 17 may also be used for on-board communications provided the effective radiated power does not exceed 1 W,

and subject to the national regulations of the administration concerned when these channels are used in its territorial waters.

*

3

The use of these channels should be restricted to navigation-related communications only and all precautions should be taken to

avoid harmful interference to channel 16, e.g. by limiting the output power to 1 W or by means geographical separation.

†

CHANNEL LIST

52

CHANNEL LIST

• USA channels (for U.K. version only)

CH

Frequency (MHz)

CH

Frequency (MHz)

CH

Frequency (MHz)

CH

Frequency (MHz)

CH

Frequency (MHz)

CH

Frequency (MHz)

Transmit Receive Transmit Receive Transmit Receive Transmit Receive Transmit Receive Transmit Receive

01A 156.050 156.050 12

156.600 156.600 22A 157.100 157.100 64A 156.225 156.225 77 156.875 156.875 86 157.325 161.925

-- - - - - - - 13

†

156.650 156.650 23A 157.150 157.150 65A

156.275 156.275 78A 156.925 156.925 86A 157.325 157.325

03A 156.150 156.150 14 156.700 156.700 24 157.200 161.800 66A 156.325 156.325

79A 156.975 156.975 87 157.375 161.975

-- - - - - - - 15

†

156.750 156.750 25 157.250 161.850 67†156.375 156.375 80A 157.025 157.025 87A 157.375 157.375

05A 156.250 156.250 16 156.800 156.800 26 157.300 161.900 68 156.425 156.425 81A 157.075 157.075 88

P4*

157.425 162.025

06 156.300 156.300 17

†

156.850 156.850 27 157.350 161.950 69 156.475 156.475 82A 157.125 157.125 88A 157.425 157.425

161.425 161.425

07A 156.350 156.350 18A 156.900 156.900 28 157.400 162.000 70 156.525 156.525 83A 157.175 157.175

08 156.400

156.400 19A 156.950 156.950 37A* 157.850 157.850 71 156.575 156.575 84 157.225 161.825

09 156.450 156.450 20 157.000 161.600 61A 156.075

156.075 72 156.625 156.625 84A 157.225 157.225

10 156.500 156.500 20A 157.000 157.000 -- - - - - - -

73 156.675 156.675 85 157.275 161.875

11 156.550 156.550 21A 157.050 157.050 63A 156.175 156.175 74

156.725 156.725 85A 157.275 157.275

†

*UK Marina Channels: M1=37A (157.850 MHz), M2=P4 (161.425 MHz) for U.K. version only

Low power only

‡

‡

Receive only

10

10

53

54

11

SPECIFICATIONS AND OPTION

■ Specifications

Specifications are measured in accordance with EN301 025.

DD

General

• Frequency coverage :
Transmit 156.000–161.450 MHz
Receive 156.000–163.425 MHz

• Mode : FM (16K0G3E)

DSC (16K0G2B)

• Current drain (at 13.8 V) : TX high (25 W) 5.5 A

Max. audio 1.5 A

• Power supply requirement : 13.8 V DC (10.8 to 15.6 V)

(negative ground)

• Frequency stability : ±1.5 kHz (–20°C to +60°C)

• Antenna connector : SO-239 (50 Ω)

• Input impedance (MIC) : 2 kΩ

• Output impedance (audio) : 4 Ω

• Dimensions : 164(W) ×78(H) × 139.5(D) mm

(Projection not included)

• Weight : Approx. 1150 g

DD

Transmitter

• RF output power : 25 W and 1 W

• Modulation system : Variable reactance frequency

modulation

• Max. frequency deviation : ±5.0 kHz

• Spurious emissions : Less than 0.25 µW

• Residual modulation : More than 40 dB

• Audio harmonic distortion : Less than 10%

(at 1 kHz, 60% deviation)

DD

Receiver

• Receive system : Double conversion
superheterodyne

• Sensitivity (20 dB SINAD) : –2 dBµ emf typical

(CH 70 receiver) –2 dBµ emf typical

• Squelch sensitivity : Less than 0 dBµ emf

• Spurious response : More than 70 dB

• Intermodulation : More than 68 dB

Adjacent channel selectivity

•

• Hum and noise : More than 40 dB

• Audio output power : More than 2 W

All stated specifications are subject to change without
notice or obligation.

: More than 70 dB

■ Option

• MB-69 FLUSH MOUNT (p. 50)

For mounting the transceiver to a panel.

Unit: mm

164

78

149

61.6

R8 (Max.)

TEMPLATE

12

11
12

Cut here

55

Dimensions

148

139.578

164 28.3 14.2111.2

60.6

Unit: mm

57

< Intended Country of Use >

GER
AUT
GBR
IRL
NOR

FRA
NED
BEL
LUX

ESP
POR
ITA
GRE

SWE
DEN
FIN
SUI

A-6380D-1EU-e
Printed in Japan

© 2004–2006 Icom Inc.

1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003, Japan