Chapter 5: Digital Selective Calling (DSC)
61
Transmitting
After the Distress transmission, the radio is automatically set to channel 16 at
high power to listen for and respond to voice replies from Coast Guard or other
vessels that may have received your Distress Call.
To mute the alarm:
Press
CLR/WX
.
To manually cancel the automatic Distress resend:
Press
CLR/WX
a second time.
The Distress Call is resent randomly every 3.5 – 4.5 minutes until an
acknowledgement is received or the call is manually cancelled.
Receiving Acknowledgement
After the call is sent, the radio waits for acknowledgement. The display stops
flashing and the alarm sounds continuously until muted or an ACK is received.
Cancelling a Distress Call Made in Error
If the countdown has not been completed, release the DISTRESS key before the
countdown has completed.
If the countdown has completed and the distress call has been sent in error, you
should make an announcement as soon as possible that the distress situation
does not exist.
1. Immediately press
CLR/WX
two times to cancel the Distress Call. The radio
returns to the state before the Distress Call.
2. Press the
16/9
key. The radio switches to the Priority Channel.
3. Make a broadcast to all stations giving your ship’s name, call sign and MMSI
number and cancel the false distress alert. For example:
“All Stations, All Stations, All Stations. This is NAME, CALL SIGN, MMSI ID,
POSITION. Cancel my distress alert of DATE, TIME, NAME, CALL SIGN.”
D10169-1
REPEATS
16
DISTRES ACK
RECEIVED
16
FROM:
001234567
ORIGINATOR:
366123456
16
UNDESIG
26 06.0098N
080 04.8589W
12:45UTC
16
DISTRES CALL
AWAIT ACK
AUTO
TRANSMIT
