AP2-1
AP2.1 DSC Test Call
Test calls should be transmitted by the ship station and acknowledged by the
called coast station. Normally there would be no further communications
between the two stations involved.
DSC Test Call is made with a coast station on a distress and safety calling frequency in
“SAFETY” category as below.
1. Create the message as follows. See next page for the location of the coast stations
and their MMSI.
CALL TYPE: TEST
ADDRESS: 00xxxxxxx (MMSI of the coast station to be called)
DSC FREQUENCY: Select the distress and safety calling frequency from 2 MHz
to16 MHz depending on the communication distance.
- When the distance is within 200 NM: 2 MHz
- When the distance is more than 200 NM: 8MHz
(The 8MHz band may in many cases be an appropriate
first choice.)
2. Press [CALL].
The transmission starts with the message “Test call in progress!” on the display.
3. After transmission, the system waits for the reply from the coast station, displaying
the message “Waiting for test Acknowledge”.
4. When receiving the reply from the coast station, the message “Test acknowledge call
received” appears. Test call is complete after checking the received message.
5. When not receiving the replay within 5 minutes, the message “No response! Try
calling again?” appears. In this case, select another frequency and retry Test Call.
Appendix 2) DSC and NBDP Test Calls
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