DSC calls
98-171832-A Chapter 2: Operation 33
Receiving distress calls
When the radio receives a distress call, the 2-tone alarm sounds. Types of distress
calls are DISTRESS, DISTRESS ACK, DISTRESS RELAY and DISTR. RELAY ACK.
1. To switch off the 2-tone alarm tap SILENT.
2. If engaged in other communications tap ACTIVATE to engage in the
received DSC call.
3. Monitor channel 16 as a coast station may require your assistance. If the
radio is not on channel 16, turn the channel selector knob or use the key
16/C to go to channel 16.
4. When the radio receives the first distress acknowledgment call a 2-tone
alarm sounds again. To switch off the 2-tone alarm tap SILENT.
5. If you decide to acknowledge the Distress tap ACK in the display.
Distress call with errors
If a distress call contains errors, it is still received.
Tap OK on the popup and tap DSC for more information. Errors are marked with
underscores (_).
Distress call log
As long as you are part of a distress session, i.e. you have not tapped QUIT, you
receive distress messages and can track all distress messages for the current
distress event.
1. Tap MORE.
2. HISTORY.
3. Use the list in the left side to see details for the messages.
4. Tap < to leave the event history.
Receiving distress calls from Man Over Board devices
The SAILOR 7222 VHF DSC supports specific handling of Man Over Board
devices (MOB). The MOB device can operate in a closed loop configuration
(sending distress relay calls) and/or open loop mode (sending distress calls).
A specific received distress session is initiated for MOB devices.
Any call which origins from a modern MOB device will be handled within a single
procedure. You will be able to see the acknowledgment status of (up to 50)
involved MOB devices in parallel.
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