About Digital Selective Calling - Uniden UM-525 Owner's Manual

About Digital Selective Calling

About Digital Selective Calling
Digital Selective Calling (DSC) lets mariners instantly send automatically formatted distress
alerts to rescue authorities anywhere in the world. Digital selective calling also lets mariners
initiate or receive distress, urgency, safety and routine radiotelephone calls to or from any
similarly equipped vessel or shore station, without requiring either party to be near a radio
loudspeaker. DSC acts like the dial and bell of a telephone, allowing you to "direct dial" and
"ring" other radios, or allow others to "ring" you, without having to listen to a speaker.
Your radio's DSC Call feature lets you transmit and receive DSC Calls based on ITU-R
M.493-11. You can send a distress message in an emergency situation, send and receive
position data to and from other vessels, and set up and use a directory of other vessels with
DSC radios.
You can also use the radio's NMEA input and output feature to display and use vessel
information. DSC calls your radio can send and receive include distress, individual, individual
ack, all ships, group, position request, position reply, and position send. DSC calls your radio
can receive include distress ack, geographic, distress relay, and distress relay ack.
About Digital Selective Calling
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