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Page 90 CPF180i and CPF300i
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.
STANDARD HORIZON VHF Marine Radios with Digital Selective Calling are able to be
interfaced with the GPS Chart Plotter 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 Chart Plotter 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
12.9.0 Interfacing
To take advantage of these functions the GPS Chart Plotter must be interfaced (wired) to
a STANDARD HORIZON or compatible DSC VHF.
Figure13.9.0 - Interfacing to VHF Radio
For additional information refer to Par. 2.4 Connections.
12.9.1 DSC Distress Call
During a Distress situation, a vessel that is equipped with a DSC VHF and connected to a
GPS, has the capability to transmit a DSC Distress Call with GPS Position.
When the STANDARD HORIZON VHF receives a DSC Distress Call, DSC/Position
information of the vessel in Distress is transferred to the GPS Chart Plotter. The GPS Chart
Plotter Logs the Distress call into the
DSC DISTRESS LOG and also prompts the user to
see the location of the Vessel in Distress and also allows for easy navigation to the vessel.
12.9.2 Position Request
STANDARD HORIZON VHF radios can transmit a DSC call to other equipped Vessels with
a DSC VHF or request this radio transmit the GPS position. When this position is received
the STANDARD HORIZON VHF radio sends the information to the GPS Chart Plotter which
displays the GPS position of the vessel on the Chart page. 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.