iC-m59 Datasheet, PDF (16/36 Pages) List of Unclassifed Manufacturers – VHF MARINE TRANSCEIVER

4 DIGITAL SELECTIVE CALLING
UX-120 required
I General
When an optional UX-120 DSC UNIT is installed, digital selec-
tive calling (or DSC) can be used via the IC-M59. DSC is a
method of radio communications involving digital signals
rather than the more conventional method of voice commu-
nications. The advantage of using digital communications
over voice communications is that information (especially
useful for distress calls and other urgent matters) can be pre-
programmed into a radio and transmitted accurately.
In addition, when a GPS receiver (NMEA0183 ver. 1.5, 2.0 or
2.1) is connected, your vessel’s position and the current UTC
time are transmitted together with the vessel’s identity when
making a distress call.
See p. 27 for unit installation.
DSC TYPE
DESCRIPTION
REF.
Distress call
This sends distress information which includes your vessel’s ID (and position data/UTC time _pgs.
when a GPS receiver is connected). Send under emergency conditions only. DSC acknowl- _{13, 16}
edgement will be received from a coast station after making a distress call.
Distress relay call
All ships call
This is used to alert Coast stations (or other ships) when a vessel in distress is unable to do _{p. 16}
so. The IC-M59 can only receive this type of signal; not transmit.
This is used for non-emergency situations. This signal includes information which allows a re- pgs.
ceiving transceiver to automatically select a specified channel for voice communication.
14, 16
Individual call
This allows you to send a signal to a specific vessel only. The vessel’s ID code must be pre- _pgs.
programmed in advance. Two kinds of acknowledgements (able to comply/unable to comply)
are available (for sending or receiving) after an individual call.
15, 17
Geographical area call ^{This is used for announcement to all ships in the specified area—when a GPS receiver is}
p. 17
connected calls directed to areas other than yours are rejected. Receive only for the IC-M59.
12