Vhf Digital Selective Calling; Distress Call - Standard Horizon CP500 Owner's Manual

Figure 12.8a - NMEA Trend pages
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 allows 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 Report
Calls to or from another vessel equipped with a DSC transceiver.
Compatible 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 compatible DSC VHF Radios 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

12.9.1 Distress Call

STANDARD HORIZON GPS Chart Plotters are able to display the location of a vessel in
distress when interfaced to a compatible DSC VHF with NMEA-0183 output and the radio
receives a DSC Distress Call. STANDARD HORIZON GPS Chart Plotter also log DSC
Distress Calls to review at a later date.
1. Press [MENU] and move the ShuttlePoint knob to highlight USER POINTS and press
[ENT].
Page 88 CP500