When Receiving A Call; I To Receive A Dsc Call - Icom IC-M801GMDSS Instruction Manual

9

WHEN RECEIVING A CALL

I To receive a DSC call

The independent built-in DSC receiver circuit in the IC-
M801GMDSS scans all distress/safety frequencies,
therefore, the "distress," "urgency" and "safety" calls on
those frequencies can be decoded at all times.
D D When receiving a DSC call
One of the following actions should be performed
when a DSC call is received depending on the re-
ceived DSC format (or category):
• Wait for a voice transmission on the traffic frequency.
• Transmit an acknowledgement with DSC or voice.
D D Display example and operation
• Monitoring the traffic frequency
Monitor the communication between the calling ship
and a coast station, or the calling station transmission
via voice on the traffic frequency.
• Emergency alarm sounds until pushing some key, or
beeps sound, depending on the calling format or cat-
egory.
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* D i s t r e s s A C K
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* D i s t r e s s R L Y
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E x i t
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E x i t
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E x i t
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E x i t E x i t
30
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0 0 12 3 4 5 6 7 *
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1 2 3 4 5 6 7 8 9 *
T r a f f i c
D i s t r e s s *
1 2 3 4 5 6 7 8 9 *
T r a f f i c
G r o u p *
I C O M M 8 0 1 *
T r a f f i c
G e o g r a p h i c a l G e o g r a p h i c * *
1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 * *
T r a f f i c T r a f f i c
However, "routine" and "group" calls on the other fre-
quencies are received via the transceiver's receiver
circuit. Therefore, the transceiver must set to DSC
watch mode by pushing [DSC] to decode these calls.
• Transmit an acknowledgement
When the following DSC is received, an acknowl-
edgement must be sent back to the calling station.
• Beeps, or an emergency alarm sounds until pushing
some key, depending on the category.
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* I n d i v i d u a l
* I C O M M 8 0 1
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E x i t
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* P o s i t i o n R E Q
* I C O M M 8 0 1
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E x i t
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* P o l l i n g R E Q
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E x i t
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T r a f f i c
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A C K
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A C K