Transmission Of Distress Alert; Multi; Auto; Single - Furuno FS-1575 Service Manual

1.3.3 Transmission of Distress Alert

To transmit a Distress alert, press and hold the [DISTRESS] button for a period of four
seconds or more. The Distress Alert Message Creation window will appear when press
the [DISTRESS MSG] button. This window allows for selecting the Nature of Distress,
a communication mode (COMM MODE), and a mode to transmit Distress alert
messages. The mode includes MULTI, AUTO, and SINGLE. The default is MULTI.
Distress alert messages from IC-350 are transmitted in MULTI mode.

1. MULTI

While in MULTI mode, a Distress alert message is transmitted at 2MHz, 8MHz,
16MHz, 4MHz, 12MHz, and 6MHz in the order described consecutively one time each.
An interval to the subsequent transmission is automatically set to a random period of
time in the range of 3.5 to 4.5 minutes.
Distress
button
pressed
2M 8M 16M 4M

2. AUTO

While in AUTO mode, a Distress alert message is repeatedly transmitted at 8MHz,
16MHz, 4MHz, 12MHz, 6MHz, 2MHz, and 8MHz in the order described after it is
transmitted at 2MHz until a Distress acknowledgement (DIS ACK) message is received.
The Distress alert message is transmitted repeatedly five times at each frequency
aforementioned. An interval to the subsequent transmission is automatically set to a
random period of time in the range of 3.5 to 4.5 minutes.
3.5 - 4.5 min.
Distress
2M
button
pressed 3.5 - 4.5 min.

3. SINGLE

While in SINGLE mode, a Distress alert message is transmitted five times at a single
frequency selected from 2MHz, 4MHz, 6MHz, 8MHz, 12MHz, and 16MHz.
An interval to the subsequent transmission is automatically set to a random period of
time in the range of 3.5 to 4.5 minutes.
Distress
ex: 2M
button
pressed
CONFIDENTIAL (internal use only)
This confidential document is used only by FURUNO authorized persons.
It is strictly prohibited to reproduce the document in whole or in part without prior written permission of FURUNO.
3.5 - 4.5 min.
12M 6M
8M 16M
3.5 - 4.5 min. 3.5 - 4.5 min.
2M
3.5 - 4.5 min. 3.5 - 4.5 min.
1-15
3.5 - 4.5 min.
4M 12M
3.5 - 4.5 min. 3.5 - 4.5 min.
2M 2M
3.5 - 4.5 min.
1.3 Operations
6M