
Chapter 2: Operation
DSC calls
19
22222
Operation
Sending, acknowledging and cancelling own distress
To send a distress message
1. Lift the cover of the red distress button and press and hold the
distress button for longer than 3 seconds. For short step-by-
step instructions how to proceed when sending a distress
message see
Emergency calls
on page vi.
When the distress signal is sent,
CH70
and
TX
appear in the display. A two-seconds
steady tone is heard.
2. The radio watches for a DSC
acknowledgement transmission on channel
70.
3. To pause the automatic resend procedure
press the soft key
PAUSE
.
4. To annul the distress message press the soft key
ANNUL
. See also
To cancel
own distress
on page 21.
5. When a distress acknowledgement is received, a pop-up window is
displayed. Start distress communication on channel 16 to inform about your
distress situation.
Having pressed the red distress button and sent the distress message, the
following information is displayed:
•
STATION: shows the radio’s MMSI number.
•
NAT: shows the nature of distress, see also
ALERT: To send a distress
message with specified nature
.
•
LAT:, LON:, POS UTC: shows the distress position data as transmitted.
•
MODE: shows the communication mode.
•
Elapsed time after initiation of own distress.
Note
If no distress acknowledgement is received within a period of 3,5 to
4,5 minutes, the distress message will automatically be
retransmitted.
ANNUL
PAUSE
POS
WAIT FOR ACK: 0:00:19
REPEAT IN: 3:38
D.MMSI: 273000000
16
NAT: UNDESIGNATED
LAT: N 12°34.5678
LON:E 123°45.6789
MODE: SIMPLEX TP
OWN DISTRESS
CH: 16
Содержание TT-6222A VHF DSC
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