Vhf Digital Selective Calling; Interfacing - Standard Horizon CP180 Owner's Manual

12.9

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).
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.
For additional information refer to Par. 2.4 Connections.
GPS Chart Plotters
Figure 12.8a - NMEA Trend pages on CP300/CP300i
Figure12.9.0 - Interfacing to VHF Radio
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