Standard Horizon CPV350 Marine GPS System User Manual


 
Page 70 CPV350
13.9 VHF DIGITAL SELECTIVE CALLING *
Digital Selective Calling is a semi-automated method of establishing a VHF radio call. DSC
had also been designated as part of the Global Maritime Distress and Safety System
(GMDSS). It is planned that DSC will eventually replace aural watches on distress
frequencies and will be used to announce routine and urgent maritime safety information
broadcasts.
This new system allow mariners to instantly send a distress call with GPS position (when
connected to the transceiver) to the US Coast Guard and other vessels within range of the
transmission. DSC will also allow mariners to initiate POSITION Request, POSITION Send
calls to or from another vessel equipped with a DSC transceiver.
The CPV350 is capable of VHF Marine Radios with Digital Selective Calling are able to be
interfaced with the GPS chartplotter which feeds GPS data to the VHF and listens for DSC
calls from the VHF. By connecting a few wires between the STANDARD HORIZON VHF and
the GPS chartplotter it will receive:
1. a vessel that has transmitted a DSC Distress call
2. a vessel that has transmitted a DSC Position Send Call
3. The position of a vessel that transmitted a DSC Position Request Call
13.9.0 Position Request
The CPV350 can transmit a DSC position request call to other equipped vessels with DSC.
The position of the polled vessel is show on the chart pages after the call was received. This
is a great feature for anyone wanting to know the position of another vessel for example you
buddy that is catching fish, or finding the location of a person you are cruising with.