Furuno FM-8500 User Manual
VHF RADIOTELEPHONE
MODEL
FM-8500
9-52 Ashihara-cho,9-52 Ashihara-cho,
A
A
*00080762901**00080762901*
*00080762901**00080762901*
*OME56030K00**OME56030K00*
Nishinomiya, JapanNishinomiya, Japan
Telephone :Telephone : 0798-65-21110798-65-2111
Telefax :Telefax : 0798-65-42000798-65-4200
Your Local Agent/DealerYour Local Agent/Dealer
ll rights reserved.
ll rights reserved.
PUB.No.PUB.No. OME-56030OME-56030
(( TATATATA ))
FM-8500FM-8500
Printed in JapanPrinted in Japan
FIRST EDITION :FIRST EDITION : DEC.DEC. 19951995
K :K : MAY.MAY. 17,200217,2002
* 0 0 0 8 0 7 6 2 9 0 1 ** 0 0 0 8 0 7 6 2 9 0 1 *
*OME56030K00**OME56030K00*
* O M E 5 6 0 3 0 K 0 0 ** O M E 5 6 0 3 0 K 0 0 *
CANCELLING A FALSE
DISTRESS ALERT
1. Switch off transmitter immediately.
2. Switch equipment on and set to Channel 16.
3. Make broadcast to "All Stations" giving your vessel's name, callsign and DSC number,
and cancel the false distress alert.
Example message:
All Stations, All Stations, All Stations
This is NAME, CALLSIGN,
DSC NUMBER, POSITION.
Cancel my distress alert of
DATE, TIME, UTC.
=Master, NAME, CALLSIGN.
DSC NUMBER, DATE, TIME UTC.
iiiiiiiiiiiii
i
ii
WARNING
Use the proper fuse.
Use of a wrong fuse can result in fire or
permanent equipment damage.
Do not use the equipment for other than
its intended purpose.
Personal injury can result if the equipment
is used as a chair or stepping stool, for
example.
Do not place objects on the top of the
equipment.
The equipment can overheat or personal
injury can result if the object falls.
CAUTION
Do not open the equipment
except to replace paper or
fuse.
Hazardous voltage which can
cause electrical shock, burn or
serious injury exists inside the
equipment. Only qualified
personnel should work inside
the equipment.
Do not disassemble or modify the
equipment.
Fire, electrical shock or serious injury
can result.
Turn off the power immediately if water
leaks into the equipment or the equipment is emitting smoke or fire.
Continued use of the equipment can cause
fire or electrical shock.
Do not place liquid-filled containers on
the top of the equipment.
Fire or electrical shock can result if a
liquid spills into the equipment.
Do not operate the equipment with wet
hands.
Electrical shock can result.
Keep heater away from equipment.
Heat can alter equipment shape and melt
the power cord, which can cause fire or
electrical shock.
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iii
Table of Contents
FOREWORD ......................................................................................vii
System Configuration .....................................................................viii
1. VHF Radiotelephone Operational Overview
1.1 Controls, Indications ..................................................................................................1-2
1.2 Telephone Operation .................................................................................................1-3
2. DSC Terminal Operational Overview
2.1 DSC Messages ...........................................................................................................2-1
2.2 Controls, LEDs...........................................................................................................2-3
2.3 Basic Operation ..........................................................................................................2-5
2.4 Auto Acknowledge .....................................................................................................2-8
3. DSC Distress Alert
3.1 Distress Alert Transmission........................................................................................3-1
3.2 Manual Entry of Ship’s Position and Time ................................................................3-4
3.3 Receiving Distress Alert from Other Ship..................................................................3-5
3.4 Distress Relay.............................................................................................................3-9
4. DSC Communication
4.1 Transmitting Individual Calls.....................................................................................4-1
4.2 Receiving Individual Call (ACK RQ) ........................................................................4-5
4.3 Transmitting All Ships Calls ......................................................................................4-9
4.4 Receiving All Ships Calls.........................................................................................4-12
4.5 Creating and Saving Transmit Messages .................................................................4-15
4.6 Writing Over Files....................................................................................................4-17
4.7 Retrieving, Transmitting Files..................................................................................4-18
4.8 Transmit/Receive Message Memory........................................................................4-19
5. Other Calling Types and Other Functions
5.1 Other Calling Types....................................................................................................5-1
5.2 Making Telephone Calls.............................................................................................5-4
5.3 Receiving Telephone Call from Coast Station ...........................................................5-7
5.4 Other Station IDs and Telephone Nos........................................................................5-8
v
6. Other Settings
6.1 Printer Setup (Auto/Manual)......................................................................................6-1
6.2 Turning Keyboard Click ON/OFF..............................................................................6-4
6.3 Aural Alarm Setup ......................................................................................................6-5
7. System Confirmation
7.1 Confirming Own Ship’s ID ........................................................................................7-1
7.2 Confirming ROM Version ..........................................................................................7-2
7.3 Confirming VHF Section Settings .............................................................................7-3
7.4 Confirming VHF Channels ........................................................................................7-4
7.5 Confirming Tx Output Power ....................................................................................7-5
8. Maintenance & Troubleshooting
8.1 Maintenance ...............................................................................................................8-1
8.2 Troubleshooting..........................................................................................................8-1
8.3 Diagnostic Test...........................................................................................................8-2
9. Specifications
10. Menu List
APPENDIX 1 Marine VHF Channel Lists .................................... AP-1
APPENDIX 2 Memory Channel List ............................................ AP-2
APPENDIX 3 DIGITAL INTERFACE (IEC 61162-1 Edition 2)...... AP-3
Declaration of conformity to type
vi
Features
FOREWORD
Thank you for purchasing this VHF Radiotelephone FM-8500. W e
are confident you will discover why FURUNO has become synonymous with quality and reliability.
Dedicated in the design and manufacture of marine electronics
equipment for half a century, FURUNO Electric Company has
gained an unrivaled reputation as a world leader in the industry.
This is the result of our technical excellence as well as our worldwide distribution and service network.
Please carefully read and follow the safety information and operating and maintenance instructions set forth in this manual before
attempting to operate the equipment and conduct any maintenance.
Y our VHF Radiotelephone FM-8500 will perform to the utmost of
its ability only if it is operated and maintained in accordance with
the correct procedures.
The FM-8500 is a highly advanced, semi-duplex, fully synthesized
25W VHF transceiver with DSC terminal, designed to satisfy the
stringent requirements of marine communications. It complies with
GMDSS carriage requirements for safety and general communications.
• Conforms to the following standards and regulations:
IMO A. 694(17)
IMO A. 803(19)
IMO A. 524(13)
IMO MSC 68(68), MSC/Circ.862
IEC-61097-3/7/8
IEC-60945 (3rd edition)
IEC-61162-1
ETS 300 338, 301 033, 300 162
ITU-R M.493-9, M.541-8, M.689-2
• Automatic position and time input and update with connection
of EPFS (Electronic Position-Fixing Equipment).
• Optional printer can automatically print out received messages
and test results.
• Log stores 50 each of latest ordinary, distress and transmitted
messages, in separate memory blocks.
• One-touch testing facility.
Program number
DSC 0550182010 (version 1.12)
RT 0550183006 (version 1.06)
vii
System Configuration
CH70 Antenna VHF Antenna
Handset
VHF Section
External
Speaker
Distress Message Controller
Power Supply
PR-300
FM-8500
DMC-5
Position-fixing
Equipment
DSC Section
MIC Receptacle
Box
Printer Interface
IF-8500
Printer
Figure 1 FM-8500 system configuration
viii
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1. VHF Radiotelephone Operational Overview
The FM-8500 system consists of a main transceiver unit and two
antennas. The transceiver unit contains a VHF transmitter , receiver ,
and channel 70 watch receiver module. The performance and operation are controlled on its front panel. The antenna may be of
any type available from FURUNO or market and the recommended
type is a vertically polarized non-directional type. The first antenna works for transmitting and receiving and the 2nd antenna for
watch keeping.
Keyboard
LCD
VHF RADIOTELEPHONE FM-8500
Watch CH 70
auto
DISTRESS CANCEL
DISTRESS
ALARM
STOP
CALL
(for DSC operation)
POSITION
AUTO ACK3TEST
1
2
PRINT5CONTRAST6VOLUME
4
FILE8RCVD9XMTD
7
CANCEL
SELECT
Controls for
VHF operation
Volume with
Power ON/OFF
(Press to turn on/off
loudspeaker.)
VOLUME
OFF
OFF/DW/SCAN(PUSH)
(PUSH)
AUTO
SQUELCH
LOW
HI
LOW
TX
CH16
REM USA WX PRIV
CH16 key
High/Low power
Squelch control
(Press for DW, Scan)
Figure 1-1 FM-8500 transceiver unit
CHANNEL
MODE(PUSH)
Channel selector
(Press for Mode selection)
Channel No. display
0
ENT
1-1
1.1 Controls, Indications
Controls
CHANNEL/ Selects a channel. Pressing the Channel Selector
MODE (rotary control) changes the mode from INTL,
SQUELCH/ Mutes the receiver when no signal is present on
DW/SCAN the channel selected. Auto position automatically
VOLUME/ Turns the power on or of f and adjusts the volume
LOUDSPEAKER
HI/LOW key Alternates high or low output power.
USA, WX, and PRIV in this order . (Appears when
USA/WX and PRIV mode are registered.)
reduces white noise.
Pressing the control changes the operating modes:
Dual watch, Scan and Off.
of the built-in loudspeaker.
Pressing the control turns the loudspeaker on or
off.
Indications
CH16 key Selects channel 16.
The display shows the following indications;
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EMULOVehtgnisserpyb,FFOrekaepsduollanretnI
denrutyllacitamotuasirekaepsduollanretnI.lortnoc
.pudekcipsitesdnahehtrevenehwffo
WOL.rewopFRwolrofsthgiL
XT.gnittimsnartelihwsthgiL
MER
ASUsadesueraslennahcxelpudUTIemoS(.edomASU
XWelbaliavA(.detcelessilennahcrehtaewanehwsthgiL
.noitatSetomeR
).slennahcxelpmis
).noisrevSUni
007-BRyblortnocrednusi0058-MFnehwsthgiL
1-2
NACS/WD.gninnacsrofNACS;hctaWlauDrofWD
1.2 Telephone Operation
Turning the power on and off
To turn the power on, turn the VOLUME control clockwise until
you hear a click. T o turn the power of f, turn the control fully counterclockwise until you hear the click.
Selecting channel modes
While pressing the channel selector, press the CH16 key to select
the channel mode, International, USA (in the case of USA version), private (if authorized), or weather mode (USA version). The
International version of FM-8500 has no such selection.
On the weather channel mode, a beep is emitted when the weather
alert tone is received.
NOTE: Private channels are available only where permitted by
the authorities.
Selecting channels
Adjusting volume
Adjusting squelch
Rotate the CHANNEL selector clockwise (counterclockwise) until a desired channel is reached.
The VOLUME control adjusts the volume of the loudspeaker.
The SQUELCH control adjusts the squelch threshold level. Adjust
it so that white noise heard in the loudspeaker just fades out. Perform this operation when no traffic is being received. AUTO squelch
automatically reduces white noise. Usually select "AUTO" position. Avoid turning the squelch too far clockwise: you may miss a
long distance communication.
Note: To obtain correct scan watch/dual watch response, adjust
the SQUELCH control precisely.
Every press of the SQUELCH control changes the function as follows:
OFF DW SCAN
1-3
Transmitting
Output power
• BEFORE transmitting, think about the subjects which have to be commu nicated and, if necessary, prepare written notes to avoid unecessary inter-
ruptions and ensure that no valuable time is wasted on a busy channel.
• Listen before commencing to transmit to make certain that the channel is
not already in use.
Press the PTT (Press-to-talk) switch on the handset or microphone
to talk, and release it to listen for the response.
Each press of the [HI/LOW] key selects HI or LOW output power .
The transmitter power is automatically set for low on the following channels.
International: CH15, CH17
USA: CH13, CH15, CH17, CH67; to operate USA chan-
Turning the loudspeaker on/off
To turn the loudspeaker on/off, press the VOLUME control. The
loudspeaker off mark appears when the speaker is off. The loudspeaker is automatically turned off when the telephone handset is
used on semi-duplex channels.
Channel 16
Press the [CH16] key to select channel CH16, International Calling and Safety Channel.
This is an international calling and safety channel. The use is limited for distress, safety and calling. The transmission on CH16
(156.800 MHz) should be limited to within 1 minute except for
distress calling.
nel 13 or 67 in high power, keep [HI/LOW]
pressed while talking into the handset.
1-4
Avoid calling on Channel 16 for purposes other than distress, urgency and very brief safety communications when another calling
channel is available.
Dual watch
The dual watch allows you to keep watch on channel 16 and another channel. CH16 and another channel are watched at intervals
of 0.15 seconds and one second, respectively.
Scanning
T o start DW , press the SQUELCH control
once. When the receiver
finds a signal on channel 16, it locks on CH16 and restarts dual
watching after the signal on CH16 has gone. If another channel
has traffic, it still continues dual watch. The speech is heard inter mittently. If you are annoyed with the intermittence, turn off DW
by pressing the PTT switch on the handset or pressing the
SQUELCH control.
The receiver scans all channels in the selected channel mode in
ascending channel order, watching CH16 between channels as below:
T o start scanning, press the SQUELCH control and SCAN is started.
When the receiver finds a signal, scanning is stopped on that channel and starts dual watch on it and channel 16.
1 16 2 16 3 16 4…
16
88 16 87 16 86 16…
Time-out-timer (U.S.A. type only)
The FM-8500 is equipped with an automatic timing device that
deactivates the transmitter and reverts the transceiver to the receive mode after an uninterrupted transmission period of 5 minutes.
Remarks on voice communications
Automatic acknowledge is automatically changed to manual acknowledge when voice communications begin. (The "auto" indication, however, remains on the screen.) This is done to prevent
break in communications. Automatic acknowledge is automatically
restored once voice communications are terminated.
Priority
The priority of the equipments is as follows.
DSC section of FM-8500 > Wing handset > Handset of FM-8500
> Remote Station RB-700
1-5
This page is intentionally left blank .
2.1 DSC Messages
The contents of a DSC message change with format specifier (calling category).
1. Format: Calling type
IND: Individual Call
TEL: Telephone Call
ALL: All Ships Call
R/A: Relay All Ships Call
R/S: Relay Specific Ships Call
GRP: Group Call
POS: Position Request Call
2. DSC Terminal
Operational Overview
2. Address: Station’s 9-digit ID number
IDs starting with “00” are coast stations, those starting with “0”
are group IDs or another IDs are ship’s IDs.
3. Category: Communication priority
There are four communication priorities as below:
DIS: A vessel is in grave and imminent danger and requests im-
mediate assistance.
URG: Announce important safety information or request medical
assistance.
SAF: Transmitting a message containing an important navigational
or an important meteorological warning.
ROU: For routine (individual) calling.
4. DSC: DSC channel
A DSC channel is different from the usual communication channel
because it is not used for voice communication but rather DSC and
acknowledging receipt of message.
5. Telecom1: Telecommand
The communication mode; simplex or semi-duplex.
2-1
6. Channel: Voice communication channel
To communicate with a coast station, a station sends its position
data to the coast station and the coast station determines the channel to use. A station may only use CH16 (distress channel) in the
event of distress.
7. Pos: Ship’s position
Position input by radionavigational equipment.
8. UTC: Universal Time Coordination
The equipment contains a clock. External time input from
radionavigational equipment cannot be used.
9. ACK RQ (BQ):
Acknowledge request (RQ) or acknowledge reply (BQ).
2-2
2.2 Controls, LEDs
Controls
OFF
VOLUME
SQUELCH
OFF/DW/SCAN(PUSH)
(PUSH)
AUTO
LCD
VHF RADIOTELEPHONE FM-8500
Watch VHF ch70
auto
DISTRESS CANCEL
DISTRESS
LOW
HI
LOW
CH16
TX
REM USA WX PRIV
ALARM
STOP
Silences the receive alarm.
Stops repetitive alerts.
DSC controls
POSITION
CALL
CHANNEL
MODE(PUSH)
AUTO ACK3TEST
1
2
PRINT5CONTRAST6VOLUME
4
FILE8RCVD9XMTD
7
0
CANCEL
SELECT
ENT
Transmits messages other than distress.
LEDs
DISTRESS
ALARM
STOP
Transmits the distress alert. Open cover on
[DISTRESS] key and press the key 4 seconds
continuously.
Figure 2-1 FM-8500 transceiver unit
The four LEDs surrounding the [DISTRESS] key light when the
key is pressed, 4 seconds continuously.
• The upper two of the four LEDs surrounding the [ALARM
STOP] key blink (and alarm sounds) when distress or urgent
message is received. LEDs can be extinguished and alarm silenced by pressing the [ALARM STOP] key.
• The lower two LEDs (Green) blink (and alarm sounds) when
message other than distress/urgent are received. Alarm is automatically silenced five seconds after message is received.
2-3
POSITION2AUTO ACK3TEST
1
PRINT5CONTRAST6VOLUME
4
FILE8RCVD9XMTD
7
CANCEL
SELECT
Key
0 9
CANCEL
SELECT
ENT
POSITION
1
0
ENT
Figure 2-2 Keyboard
Function/Purpose
Enter numeric data.
Cancels wrong data and restores previous menu.
Adjusts illumination of LED and keys in four levels.
1. Display “Set up menu” (Main menu).
2. Changes settings of items appearing with blinking question mark.
Registers key input. (Blinking item is registered when key is pressed.)
1. Shifts the cursor leftward.
2. Restores previous display when pressed at displays with a blinking
question mark.
Shifts the cursor rightward.
Ship’s position and time are shown while pressed and held down.
AUTO ACK
2
TEST
3
PRINT
4
CONTRAST
5
FILE
7
RCVD
8
XMTD
9
VOLUME
6
Turns automatic transmission of acknowledge call (AUTO ACK) on/off. (Refer
to page 2-8.) Note that distress alert cannot be automatically acknowledged
by “auto acknowledge”.
Conducts self-tests.
Printing. (This is also available for automatic setting of the printer.)
Adjusts contrast of LCD in eight levels.
Retrieves files.
Displays contents of received messages (Storage capacity: 100 files, 50 each
of distress and other). (Refer to page 4-21.)
Displays contents of transmitted messages (Storage capacity: 50 files).
(Refer to page 4-19.)
Not used.
2-4
2.3 Basic Operation
Normal display
When the FM-8500 is turned on, the following display appears.
This display is known as the “normal display.”
Watch VHF CH70
auto
[2] key pressed to get “auto” screen.
Should you get lost in operation you can return to the normal display by pressing the [CANCEL] key several times.
Selecting and registering items
The arrow keys ( [t] and [s] ) function to select items on the LCD.
After selecting item, press the [ENT] key to register it.
Blinking
cusor
encloses
current
selection.
Call type <ALL ships>
IND TEL ALL R/A ---
(Shifts
cursor
leftward.)
Normal display
screen
Item selected by cursor
appears here.
Call type
selection screen
(In this example
it is “Call type”.)
(Shifts
cursor
rightward.)
Press the [ENT] key.
When blinking question mark appears
Press the [ENT] or [SELECT] key depending on your desire.
* VHF call message *
Format ? INDIVIDUAL
• If change is necessary,
press the [SELECT] key.
Blinking question mark
Format selection screen
(In this example it is format
for “VHF call message”.)
• If no change is necessary,
press the [ENT] key.
2-5
Preparing and Transmitting Messages
There are two methods by which you can prepare and transmit
messages, and they are shown below.
Preparing message for immediate transmission
Prepare message and then transmit it.
Normal display
Press the [ENT] key.
* VHF call message *
Format? INDIVIDUAL
For how to prepare a message, refer
to page 4-1.
After preparation, press the [CALL]
key to transmit the message.
Preparing and storing message for later transmission
Prepare messages excluding distress message and save them to the
memory. (Maximum 99 files) You may retrieve and transmit a
memory-stored message as follows.
Normal display
Press the [SELECT] key.
Set up menu < >
1 2 3 4 6 7 9 ALM
Press the [7] key.
For how to prepare and store a message, refer to “4.5 Preparing
and Saving Transmit Messages”.
After the normal display appears, press keys in the order
shown below to transmit a message.
2-6
Press the [7] key. / (Enter file number.) / Press the [CALL] key.
Status of FM-8500 during DSC Call
When the distress alert is transmitted (by pressing the [DISTRESS]
key), the output power of the FM-8500 is automatically set to maximum (25 W).
Key entry of VHF
The FM-8500’s keyboard accepts no key input while DSC message is transmitted. (Distress call: inoperative about 3 seconds, other
calls: inoperative about 0.5 seconds.)
To unlock it manually, if necessary, press the [CANCEL] key.
The VHF section keyboard accepts no key input when the PTT
switch is operated.
2-7
2.4 Auto Acknowledge
Auto acknowledge functions to automatically acknowledge individual calls. Press the [2] (AUTO ACK) key to automatically transmit the acknowledge back (ACK BQ) to the sending station when
an individual call is received.
An individual message cannot be automatically acknowledged
when it is received while the handset is off hook.
When auto acknowledge is disabled
• Automatic acknowledge is disabled when an Error Checking
Code (ECC) appears at the end of a receive message.
• A distress alert is received.(A distress alert cannot be acknowledged automatically.)
Turning & AUTO ACK on/off
“auto” function
“manual” function
Each press of the[2] key enables/disables auto acknowledge function..
Provides automatic acknowledge of individual calls. Automatic
acknowledge, however, is disabled when conducting voice communications.
Manual acknowledge of all calls. However, an all ship’s call is
automatically acknowledged when no voice communications are
taking place when the call is received. See page 4-12 for details.
2-8
Transmitting the distress call
Nature of Distress
If no numeric
key is pressed,
distress alert is
automatically
transmitted.
Watch VHF CH70
auto
1 Open cover on [DISTRESS] key.
2 Press [DISTRESS] key 4 seconds
continuously.
DISTRESS CALL CH70
34° 40N 135° 20E at 15:20
To announce nature of distress, press appropriate key
for nature of distress within 3 sec. after pressing the
[DISTRESS] key. Continue pressing [DISTRESS] key 4
sec.
DISTRESS CALL Nature?
UNDESIGNATED
[1]: Fire, explosion
[2]: Flooding
[3]: Collision
[4]: Grounding
[5]: Listing, capsizing
[6]: Sinking
[7]: Disabled & adrift
[8]: Abandoning
[0]: Undesignated
[ ]: Piracy/armed
robbery attack
[ ]: Man overboard
Position/Time
Nature of Distress
If wrong nature of distress is input, enter correct
nature within 3 seconds.
* Call in progress *
DISTRESS CALL CH70
Transmission time is about three seconds.
A coast station will transmit a DIST ACK signal to you to confirm the
distress alert. Once you have received the DIST ACK signal, CH16
(Distress, Safety and Calling frequency) is automatically selected so
that you may commence voice communications with the coast
station. After the [DISTRESS] key has been pressed, no further
operation of the radiotelephone is required until you have received
the DIST ACK signal.
* Wait for dist ack *
Next CH70 3.7 min
Counts down. If distress call is not
acknowledged it is automatically
retransmitted until acknowledged.
(Do nothing until own ship receives DIST
ACK.)
(continued on next page)
(Transmitting)
(Waiting for distress
acknowldege)
3-2
Commence voice communications with coast station on CH16.
* Received * DISTRESS ACK
ID : 001234567
ID of station (usually coast station)
which transmitted DIST ACK.
(from previous page)
1. Provide the following information to the coast station:
(1) Speak slowly and distinctly , “MA YDA Y, MA YDAY , MA Y-
DAY”, pronounced as the French expression “m’aider”.
Distress call
Distress communications
(2) This is;
(3) The name of your vessel and call sign three times.
Then, begin the distress communications, which consists of:
(1) Position in latitude and longitude;
(2) The name of the distress;
(3) The kind of assistance desired;
(4) Any other information which might facilitate rescue, for
example, length, color, and type of vessel, number of persons on board.
2. Indicate the end of message by saying “Over”.
Some countries do not have sea area A. In this case "ACK" from
the coast station does not arrive over DSC. A ship nearby will contact the vessel in distress over CH16. After transmitting the distress alert conduct voice distress communications as shown above.
3-3
3.2 Manual Entry of Ship’s Position and Time
Entering data manually
If automatic position input is lost for one minute the message "EPFS
error" appears. In this case, enter position manually as below.
(Normal display)
* VHF call message *
Format: DISTRESS
Press [ENT], [ENT]
[SELECT] in this order.
Position < >
NORTH= ˚ S E= ˚ W UTC= :
Enter
latitude.
To move blinking cursor from NORTH
position to SOUTH, press the [s] key.
To enter data manually
from the Distress Alert
message, press [ENT]
and select call type
Distress.
Enter
longitude.
Watch VHF CH70
Press the [SELECT] key
followed by the [1] key.
Enter time
(UTC).
Press the [ENT] key.
(Returns to normal
display.)
Note: If the manually entered position is not updated within four
hours the buzzer sounds and the message "Warning: Update position!" appears on the screen. And if not updated within 23.5 hours
the position entered is erased. Once automatic input of position is
restored, cancel manually entered position as below.
Confirming Ship's Position and Time
Press and hold down the [1] (POSITION) key, ship's position and
time are shown while the key is pressed.
Canceling manually entered data
To cancel the manually entered data, enter 9999 for the time and
press the [ENT] key.
Note: Above procedure may also be used when you do not know
your ship's position. This data is input as NO INFORMATION in
POS&TIME in the DISTRESS ALER T MESSAGE.
3-4
3.3 Receiving Distress Alert from Other Ship
In no case is a ship permitted to transmit a DSC distress relay
call on receipt of a DSC distress alert on VHF channel 70.
Conditions necessary for relaying distress alert:
1 When the station in distress is not itself in a position to transmit
the distress message, or
2 When the master or person responsible for the vessel not in
distress, or the person responsible for the coast station, considers that further help is necessary.
Procedure when in area A1
1. When the FM-8500 receives a distress alert from another ves-
sel the upper two LEDs (Red) near the [ALARM STOP] key
blink and the FM-8500 sounds the distress alarm.
2. Silence the alarm by pressing the [ALARM STOP] key.
3. Wait up to three minutes until the DIST ACK signal from a
coast station is received. Be prepared to follow the instructions
of the coast station.
4. If you do not receive the DIST ACK signal, follow the flow
chart shown on the next page.
If further DSC alerts are received from the same source and the
ship in distress is beyond doubt in the vicinity, a DSC
acknowledgement may, after consulation with an RCC or Coast
Station, be sent to terminate the call.
Note 1: An asterisk (*) in a received distress alert message indicates error or unknown at the location marked with the asterisk.
Note 2: Do not send DISK ACK in response to receipt of distress
alert having a nature of distress of EPIRB emission.
Your Ship
About 20 to 30 miles
(Sea area A1)
Vessel in Distress
Coast station
Distress Alert
Transmission
3-5
Flow chart - Action by ships upon reception of VHF DSC distress alert
DSC Distress alert received.
Press [ALARM STOP]
key to silence alarm.
Listen on CH16 for
5 minutes.
Did you receive
acknowledge from
No
CS and/or RCC?
Yes
CS = Coast Station
RCC = Rescue Co-ordination Center
Enter details in log.
Is distress traffic
in progress?
Yes
Is own
vessel able
to assist?
No
No
Is distress call
continuing?
Yes
Acknowledge the alert by
Yes
radiotelphony to the ship
in distress on VHF CH16.
Inform CS and/or RCC.
No
1. Say "MAYDAY" ONCE.
2. Say ID number of vessel
in distress THREE TIMES.
3. Say "This is" ONCE.
4. Say ID number of your vessel
THREE TIMES.
5. Say "Received MAYDAY"
ONCE.
3-6
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