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4
DIGITAL SELECTIVE CALLING
15
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Receiving DSC calls
Several types of DSC transmissions can be received. The re-
quired action depends on the particular DSC type as outlined
in the following examples. However, in all examples, you must
be monitoring channel 70 in order to receive such signals.
NOTE: When channel 70 is set as a tag channel and scan
is functioning, DSC calls will not be received. DSC calls
can only be received when channel 70 is selected.
D
Receiving a distress call
While monitoring channel 70 and a distress call is received:
➥
Emergency alarm sounds.
➥
“RCV” and “dTR” appear in the
display; then, channel 16 is au-
tomatically selected.
➥
Push [16] to stop the alarm.
➥
Continue monitoring channel
16 as a coast station may re-
quire assistance in any rescue
attempt.
D
Receiving a distress relay call
A distress relay call may be transmitted from a large ship to a
coast station. While monitoring channel 70 and a distress
relay call is received:
➥
Emergency alarm sounds.
➥
“RCV” and “RLY” appear in the
display; then, channel 16 is au-
tomatically selected.
➥
Push [16] to stop the alarm.
➥
Monitor channel 16 until the
emergency communication
has been completed.
INT
INT
RCV
BUSY
RCV
LOW
INT
INT
RCV
BUSY
RCV
LOW
INT
RCV
When a distress call is received
When an all ships call is received
When an individual call is received
When a geographical area call
is received
When a distress relay call is
received
INT
RCV
INT
RCV
RCV
INT
INT
RCV
INT
ACK
LOW
Able to comply is pre-selected,
and channel 12 is specified.
Unable to comply is
pre-selected.