Furuno FM-8700 User Manual
VHF RADIOTELEPHONE
MODEL
FM-8700
C
All rights reserved.
PUB. No. OME- 561 70
( YOSH)
FIRST EDITION : APR. 199 8
9-52, Ashihara- cho,
Nishinomiya, Japan
Telephone: 0798-65-2111
Telefax: 0798-65-4200
Printed in Japan
Your Local Agent/Dealer
K1 : JUL . 3 , 2002
FM-8700
CANCELING DISTRESS ALERT
If less than five seconds has elapsed since the [DISTRESS] key was pressed, the distress alert
may be canceled by pressing the [ALARM STOP] key. Otherwise, do the following:
1. Switch off equipment immediately.
2. Switch equipment on and set to Channel 16.
3. Transmit message to "All Stations” giving your vessel's name, callsign and DSC number to
cancel the distress alert.
Example message:
All Stations, All Stations, All Stations
This is VESSEL'S NAME, CALLSIGN,
DSC NUMBER, POSITION.
Cancel my distress alert of
DATE, TIME, UTC.
=Master, VESSEL'S NAME, CALLSIGN.
DSC NUMBER, DATE, TIME UTC.
iiiiiiiiiiiii
i
SAFETY INSTRUCTIONS
WARNING
Do not open the equipment.
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.
CAUTION
Do not touch any part of the antenna
when the equipment is transmitting.
Electrical shock can result.
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.
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.
Any repair work must be done by a
licensed radio technician.
Improper repair work can cause electrical
shock or fire.
ii
TABLE OF CONTENTS
FOREWORD..................................................................................................................... v
SYSTEM CONFIGURATION .................................................................................. vii
1. VHF RADIOTELEPHONE OPERATIONAL OVERVIEW
1.1 Front Panel .................................................................................................................1-1
1.2 VHF Controls, Indications .........................................................................................1-2
1.3 Tu rning the Power On/Off..........................................................................................1-2
1.4 Selecting Channel Modes, Channels..........................................................................1-3
1.5 Adjusting Volume of Loudspeaker .............................................................................1-3
1.6 Adjusting Squelch, Selecting Operating Functions....................................................1-3
1.7 Transmitting ...............................................................................................................1-4
1.8 Selecting Output Power..............................................................................................1-4
1.9 Tu rning the Loudspeaker On/Off ...............................................................................1-4
1.10 Automatic Selection of CH16 ..................................................................................1-4
1.11 Dual Watch ...............................................................................................................1-5
1.12 Scanning...................................................................................................................1-5
1.13 Remarks on Voice Communications ........................................................................1-6
2. DSC TERMINAL OPERATIONAL OVERVIEW
2.1 DSC Controls, LED Warnings ...................................................................................2-1
2.2 DSC Operational Overview .......................................................................................2-4
2.3 Turning Remote & Auto Acknowledge On/Off .........................................................2-7
3. DSC DISTRESS COMMUNICATIONS
3.1 Distress Alert Transmission........................................................................................3-1
3.2 Manual Entry of Own Ship’s Position and Time........................................................3-3
3.3 Canceling a Distress Call ...........................................................................................3-4
3.4 Receiving Distress Alert from Other Vessel, Transmitting DIST ACK Signal ..........3-5
3.5 Distress Alert Relay....................................................................................................3-9
4. DSC OPERATION FOR NON-DISTRESS CASES
4.1 Transmitting Individual Calls.....................................................................................4-1
4.2 Receiving Individual Calls (ACK RQ) ......................................................................4-5
4.3 Transmitting All Ships Calls ......................................................................................4-9
4.4 Receiving All Ships Calls.........................................................................................4-12
iii
4.5 Preparing and Saving Messages...............................................................................4-16
4.6 Writing Over Files....................................................................................................4-18
4.7 Opening, Transmitting Files.....................................................................................4-19
4.8 Transmit/Receive Message Memory........................................................................4-20
5. OTHER CALLING TYPES
5.1 Selection of Other Calling Types ...............................................................................5-1
5.2 Making Telephone Calls.............................................................................................5-3
5.3 Receiving Telephone Call from Coast Station ...........................................................5-6
5.4 Other Station IDs and Telephone Numbers................................................................5-7
6. USER PREFERENCES
6.1 Automatic or Manual Printing (Printer setup)............................................................6-1
6.2 Turning Key Beep On/Off ..........................................................................................6-4
6.3 Alarm Setup................................................................................................................6-5
7. SYSTEM CONFIRMATION
7.1 Confirming Own Ship’s ID ........................................................................................7-1
7.2 Confirming ROM Version No. ...................................................................................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
SPECIFICATIONS..................................................................................................... SP-1
APPENDIX......................................................................................................................A-1
Menu Tree .......................................................................................................................A-1
Marine VHF Channel Lists .............................................................................................A-4
Digital Interface (IEC 61162-1 Edition 2).......................................................................A-9
INDEX......................................................................................................................... Index-1
Declaration of conformity to type
iv
FOREWORD
A Word to FM-8700 Owners
Congratulations on your choice of the FURUNO FM-8700 VHF
Radiotelephone. We are confident you will see why the FURUNO
name has become synonymous with quality and reliability.
For over 40 years FURUNO Electric Company has enjoyed an
enviable reputation for quality marine electronics equipment. This
dedication to excellence is furthered by our extensive global network of agents and dealers.
This equipment is designed and constructed to meet the rigorous
demands of the marine environment. However, no machine can
perform its intended function unless operated and maintained properly . Please carefully read and follow the recommended procedures
for operation and maintenance.
W e would appreciate hearing from you, the end-user , about whether
we are achieving our purposes.
Thank you for considering and purchasing FURUNO equipment.
v
Features
The FURUNO FM-8700 is a cost-effective all-in-one marine VHF
radio system consisting of a 25 W VHF radiotelephone, a DSC
modem, a CH 70 watch receiver, and a duplexer unit. It complies
with GMDSS carriage requirements for safety and general communications.
The FM-8700 offers simplex/ full-duplex voice communications
on ITU channels in the marine mobile VHF band. The features
include Dual Watch which allows a continuous watch on CH16
and another selected frequency.
Full Class-A DSC functions are provided for distress alert transmission and reception, as well as the general call formats (Individual telephone, All Ships, Group and Area Call). Distress alert
can be readily transmitted but an arrangement is provided to prevent accidental activation. The FM-8700 maintains a continuous
watch on CH70 even while another VHF channel is in use. Aural
and visual alarms are given to incoming DSC messages.
The main features of the FM-8700 are
• Compact cabinet allows for flexible and space-saving installation on a navigation console or at the conning position
• 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
• Full-duplex communications
• Precision PLL frequency synthesizer for high frequency stability as required for DSC operation
• Dual Watch and Multiple Watch
• Continuous DSC watch on CH70
Program number
vi
• Prevention of accidental distress alert
• File editing for emergency readiness
• Automatic entry of own ship position with manual override
DSC 0550192004 (version 1.06)
RT 0550193004 (version 1.04)
SYSTEM CONFIGURATION
The FM-8700 is a highly advanced, full-duplex, fully synthesized
25 W VHF transceiver with DSC terminal. It is designed to satisfy
the stringent requirements of marine communications, and complies with GMDSS carriage requirements for safety and general
communications.
Handset
External Speaker
Remote Station RB-700
VHF
Antenna
CH70 RX
Antenna
DX-8700
DUPLEXER UNIT
TRANSCEIVER UNIT
FM-8700
Navigation Device
Wing Handset (port)
Wing Handset (starboard)
AC/DC
Power
Supply
Unit PR-300
24 VDC
Distress
Message
Controller
DMC-5
110/220 VAC
24 VDC
Distributor DB-500
Printer
Interface
IF-8500
: Standard Supply
: Optional Supply
Figure 1 FM-8700 system configuration
Printer
PP-510
vii
This page is intentionally left blank .
1. VHF RADIOTELEPHONE OPERATIONAL OVER VIEW
The FM-8700 system consists of a transceiver unit, a duplexer unit
and two antennas. The transceiver unit contains a VHF transmitter, receiver, and channel 70 watch receiver module. All operations are controlled on its front panel.
1.1 Front Panel
Controls for
DSC calling
VHF RADIOTELEPHONE FM-8700
Watch CH 70
auto
DISTRESS
LCD
DISTRESS CANCEL
ALARM
STOP
CALL
Keyboard
(for DSC operation)
POSITION
AUTO ACK3TEST
1
2
PRINT5CONTRAST6VOLUME
4
FILE8RCVD9XMTD
7
CANCEL
SELECT
Controls for
VHF operation
VOLUME
OFF
Volume with
Power ON/OFF
(Press to turn
loudspeaker on/off.)
Figure 1-1 FM-8700 transceiver unit
SQUELCH
OFF/DW/SCAN(PUSH)
(PUSH)
AUTO
LOW
HI
LOW
High/Low power
Squelch control
(Press for DW, Scan.)
TX
REM USA WX PRIV
CH16
CH16 key
CHANNEL
MODE(PUSH)
Channel selector
(Press for Mode selection.)
Channel No. display
0
ENT
1-1
1.2 VHF Controls, Indications
Control Function
CHANNEL/
MODE
SQUELCH/
DW/SCAN
VOLUME Rotation turns the power on/off and adjusts
HI/LOW key Alternates high and low output power.
CH16 key Selects channel 16.
Indication Meaning
CHANNEL (Rotary control): Selects a
channel.
MODE (Push): Changes modes in order of
INTL, USA, WX and PRIV. (USA, WX and
PRIV modes available where permitted.)
SQUELCH (Rotary control): Mutes the
receiver when no signal is present on the
channel selected. AUTO position
automatically reduces white noise.
DW/SCAN (Push): Changes the operating
function in order of Dual Watch, Scan and
Off.
the volume of the loudspeaker. Pressing turns
off the internal loudspeaker.
Internal loudspeaker OFF by pressing the
VOLUME control. Internal loudspeaker is
automatically turned off whenever the handset
is set in its rest.
LOW Lights RF power is LOW.
TX Lights while transmitting.
REM Lights when FM-8700 is being controlled by
Remote Station RB-700.
USA USA mode. (Some ITU duplex channels are
used as simplex channels.)
WX Lights when a weather channel is selected.
(Available in USA version.)
DW/SCAN DW for Dual Watch; SCAN for scanning.
1.3 Turning the Power On/Off
To turn the power on, turn the VOLUME control clockwise until
you hear a click. T o turn the power off, turn the control fully counterclockwise until you hear the click.
1-2
1.4 Selecting Channel Modes, Channels
Selecting channel modes
While pressing the CHANNEL selector, press the CH16 key to
select the channel mode: International, USA (in the case of USA
channel permitted), private (if authorized), or weather mode (USA
channel permitted). The International version of the FM-8700 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
Rotate the CHANNEL selector clockwise (counterclockwise) to
display desired channel in the channel No. display window.
1.5 Adjusting Volume of Loudspeaker
The VOLUME control adjusts the volume of the loudspeaker.
1.6 Adjusting Squelch, Selecting Operating Functions
Adjusting squelch
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 the AUT O 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.
Selecting operating function
Every pressing of the SQUELCH control changes the operating
function as follows:
OFF DW SCAN
1-3
1.7 Transmitting
Press the PTT (Press-to-talk) switch on the handset or microphone
to talk, and release it to listen for the response. The VHF section
keyboard accepts no key input when the PTT switch is operated.
Remarks on transmitting
• Before transmitting, think about the subjects which have to be
communicated and, if necessary, prepare written notes to avoid
unnecessary interruptions 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.
1.8 Selecting Output Power
Each press of the [HI/LOW] key selects HI or LOW output power .
LOW appears when low power is selected. The transmitter power
is automatically set for low on the following channels:
International: CH15, CH17
USA: CH13, CH15, CH17, CH67; to operate USA chan-
nel 13 or 67 in high power, keep [HI/LOW] pressed
while talking into the handset.
1.9 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.
1.10 Automatic Selection of CH16
Press the [CH16] key to select CH16, the International Calling and
Safety Channel. The use is limited to distress, safety and calling.
The transmission on CH16 (156.800 MHz) should be limited to
within 1 minute except for distress calling.
1-4
Avoid calling on CH16 for purposes other than distress, urgency
and very brief safety communications when another calling channel is available.
1.11 Dual Watch
1 16 2 16 3 16 4…
16
88 16 87 16 86 16…
1.12 Scanning
The dual watch function permits watch on CH16 and another selected channel. CH16 and another channel are watched at intervals
of 0.15 seconds and one second, respectively.
To start DW, first select the other frequency to watch and then
press the SQUELCH control. When the receiver finds a signal on
CH16, it locks on it 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 intermittently . 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:
To start scanning, press the SQUELCH control. When the receiver
finds a signal, scanning is stopped on that channel and starts dual
watch on it and CH16.
1-5
1.13 Remarks on Voice Communications
Automatic acknowledge (DSC operation) 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 equipment is as follows: DSC section of FM8700>Wing handset>Handset of FM-8700>Remote Station RB700
1-6
Note: Time-out Timer
The FM-8700 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. Please contact your dealer if necessary .
2. DSC TERMINAL OPERATIONAL OVERVIEW
Digital Selective Calling (DSC) is the globally adapted system by
the ITU-R and IMO for selective calling of coast station and ship
radio stations. The DSC system is used for both safety and routine.
The GMDSS requires the use of DSC for distress alerting and safety
calls.
2.1 DSC Controls, LED Warnings
DSC controls
OFF
VOLUME
SQUELCH
OFF/DW/SCAN(PUSH)
(PUSH)
AUTO
LCD
VHF RADIOTELEPHONE FM-8700
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.
Transmits the distress alert. Press the [DISTRESS]
key 4 seconds continuously.
Figure 2-1 FM-8700 transceiver unit
2-1
LED warnings
DISTRESS
ALARM
STOP
The four LEDs surrounding the [DISTRESS] key light continuously when the distress signal is transmitted.
• 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.
2-2
DSC control description
POSITION2AUTO ACK3TEST
1
PRINT5CONTRAST6VOLUME
4
FILE8RCVD9XMTD
7
0
CANCEL
SELECT
ENT
Key Function/Purpose
0 9
CANCEL
Enter numeric data.
Cancels wrong data and restores previous menu.
Adjusts illumination of LED and keys in four levels.
SELECT
1. Displays Set up menu (Main menu).
2. Changes settings of items appearing with blinking question mark.
ENT
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.
Figure 2-2 DSC keyboard
POSITION
1
AUTO ACK
2
TEST
3
PRINT
4
CONTRAST
5
FILE
7
RCVD
8
XMTD
9
Shifts the cursor rightward.
Position and time are shown while pressed and held down.
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. (Also sets up automatic printing.)
Adjusts contrast of LCD in eight levels.
Opens files.
Displays contents of received messages. (Storage capacity: 100 files, 50
each of distress and other.) (Refer to page 4-20.)
Displays contents of transmitted messages. (Storage capacity: 50 files.)
(Refer to page 4-20.)
VOLUME
6
Not used.
2-3
2.2 DSC Operational Overview
Standby display
When the FM-8700 is turned on, the following display appears.
This display is known as the “standby display.” This is where you
will begin most operations.
Watch VHF CH70
auto
[2] key pressed to get "auto" screen.
Standby display
screen
Should you get lost in operation you can return to the standby 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.
Item selected by cursor
appears here.
Blinking
cursor
encloses
current
selection.
Call type <ALL ships>
IND TEL ALL R/A ---
(Scrolls
screen
leftward.)
(Scrolls
screen
rightward.)
Call type
selection screen
Press the [ENT] key.
When blinking question mark appears
Press the [ENT] or [SELECT] key depending on your desire.
Blinking question mark
* VHF call message *
Format ? INDIVIDUAL
If change is necessary
press the [SELECT] key.
If no change is necessary,
press the [ENT] key.
Format selection screen
(In this example it is format
for "VHF call message.")
2-4
Preparing and transmitting DSC messages
There are two methods by which you can prepare and transmit
DSC messages, and they are shown below.
Preparing message for immediate transmission
Prepare message and then transmit it as follows:
Standby display
Press the [ENT] key.
* VHF call message *
Format? INDIVIDUAL
For how to prepare a DSC message,
refer to page 4-1.
After preparation, press the [CALL]
key to transmit the DSC message.
Transmitting a message stored in the memory
99 messages (excluding distress message) can be saved to the
memory. You may open a memory-stored message and transmit it
as follows:
Standby 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 Messages."
After the standby display appears, press keys in the order
shown below to transmit a DSC messages.
Press the [7] key. / (Enter file number.) / Press the [CALL] key.
2-5
Distress alert transmission and output power
When the distress alert is transmitted (by pressing the [DISTRESS]
key), the output power of the FM-8700 is automatically set to maximum (25 W).
When keyboard input is prohibited
The DSC section keyboard accepts no key input while a DSC message is being transmitted. (DSC keyboard is inoperative about 3
seconds during a DSC distress call; 0.5 seconds for other DSC
calls.)
2-6
2.3 Turning Remote & Auto Acknowledge On/Off
To enable or disable AUTO ACK and remote control, press the [2}
key. Each press of the key enables or disables automatic acknowledge and remote control function in the sequence shown below.
Watch
Auto
Watch
Manual
Watch
Limit
Press [2] key
Press [2] key
Press [2] key
Limit acknowledge
Automatic
acknowledge
ON ON ON
ON ON OFF
OFF ON
Remote control function
At transmission
with [CALL] key
pressed
At reception
1) When receiving
all ships call or
call related to
distress: ON
2) When receiving
calls other than
the above: OFF
The limit setting provides restricted use of the remote control function. It is useful when the following is desired:
• Automatically set a working channel when receiving an All Ships
call so as not to miss initial voice from the transmitting station.
• Prevent automatic transmission of acknowledge back (ACK BQ)
in response to an individual call, when no operator is present.
• Prevent automatic transmission of own ship position data in response to an individual call which requests such data.
Auto acknowledge is automatically 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.)
• Conducting voice communications.
2-7
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3. DSC DISTRESS COMMUNICATIONS
3.1 Distress Alert Transmission
1
2
3-1
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:
Distress call
(1) Speak slowly and distinctly , “MA YDA Y, MA YDA Y, MAY-
DAY,” pronounced as the French expression “m’aider.”
(2) This is;
(3) The name of your vessel and call sign three times.
Then, begin the distress communications, which consists of:
Distress communications
(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 per-
sons 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.
3-2
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 ALERT MESSAGE.
3-3
3.3 Canceling a Distress Call
Within five seconds after pressing the [DISTRESS]
key
If the [DISTRESS] key is pressed by mistake, press the [ALARM
STOP] key immediately (within 5 seconds). The distress call will
be canceled.
[ALARM STOP] key
* Ready for calling *
DISTRESS CALL CH70
DISTRESS CANCEL
DISTRESS
ALARM
STOP
CALL
LOW
HI
LOW
TX
CH16
REM USA WX PRIV
CHANNEL
MODE(PUSH)
Figure 3-1 ALARM STOP key
If more than five seconds elapses after the
[DISTRESS] key is pressed
1. Switch off equipment immediately.
2. Switch equipment on and set to Channel 16.
3. Transmit message to “All Stations” giving your vessel's name,
callsign and DSC number to cancel the distress alert.
Example message
All Stations, All Stations, All Stations
This is VESSEL'S NAME, CALLSIGN,
DSC NUMBER, POSITION.
3-4
Cancel my distress alert of
DA TE, TIME, UTC.
=Master, VESSEL'S NAME, CALLSIGN.
DSC NUMBER, DATE, TIME UTC.
3.4 Receiving Distress Alert from Other Vessel, Transmitting DIST ACK Signal
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.
Procedure when in area A1
1. When the FM-8700 receives a distress alert from another vessel the upper two LEDs (Red) near the [ALARM STOP] key
blink and the FM-85700 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)
Coast station
Distress Alert
Transmission
Vessel in Distress
Figure 3-2 Receiving distress alert from other vessel
3-5
DSC Distress alert received.
Press [ALARM STOP]
key to silence alarm.
Listen on CH16 for
5 minutes.
Flow chart for determining if you should/should not
transmit DIST ACK signal
Did you receive
acknowledge from
CS and/or RCC?
Yes
CS = Coast Station
RCC = Rescue Co-ordination Center
Enter details in log.
No
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.
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.
Inform CS and/or RCC.
No
3-6
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