3-1
3. DSC OPERATION FOR
NON-DISTRESS CASES
Note: When you set a call type to RELAY ALL, RELAY SEL, or DISTRESS by error in the
Compose Message screen, you cannot change the CALL TYPE in the same screen. If you
want to cancel the call, press the CANCEL key and restart from scratch.
** Compose Message **
NATURE : UNDESIGNATED
CALL TYPE : DISTRESS
POS :
12° 34. 1234’ N
123° 45. 6789’ E
AT : 12 : 34
TELEPHONE
ACK REQ
3.1 Coast or Ship Call
The coast or ship call is for sending message to a specific coast or ship station.
After transmitting message (called ACK RQ transmission), wait to receive the
acknowledge back (ACK BQ) signal from the receiving station. You should receive it
within five minutes.
Own Ship
Coast Station
d Acknowledge back
(ACK BQ signal)
c Coast or ship call
(ACK RQ transmission)
How a coast or ship call is transmitted
General procedure for transmitting a coast or ship call
Load saved Tx message, or prepare
message.
Transmit message.
Receive ACK BQ from receiving station.
Communicate with station.
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