Digital Selective Calling; General - Icom IC-M59euro Instruction Manual

4

DIGITAL SELECTIVE CALLING

General

When an optional UX-120
is installed, digital selective calling (DSC class-F)
SWITCH BOX
is available with via the IC-M59
DSC is a method of radio communications involving digital
signals rather than the more conventional method of voice
communications. The advantage of using digital communica-
tions over voice communications is that information (espe-
DSC TYPE
Distress call
Distress relay call
All ships call
Individual call
Geographical area call
12
with RC-18
DSC UNIT DISTRESS
.
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This sends distress information which includes your vessel's ID (and position data/UTC time
when a GPS receiver is connected). Send under emergency conditions only. DSC acknowl-
edgement will be received from a coast station after making a distress call.
This is used to alert Coast stations (or other ships) when a vessel in distress is unable to do so.
The IC-M59 can only receive this type of signal; not transmit.
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This signal includes a category and channel data which allows a receiving transceiver to au-
tomatically select channel 16 for voice communication.
This is used for calling to a specific vessel. The IC-M59
sion capability, but has receive capability. Two kinds of acknowledgements (able to comply/un-
able to comply) are available after receiving an individual call.
This is used for announcement to all ships in the specified area—when a GPS receiver is con-
nected calls directed to areas other than yours are rejected. Receive only for the IC-M59
cially 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 pgs. 23, 24 for unit installation.
DESCRIPTION
has no individual call transmis-
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UX-120 required
REF.
pgs.
13, 16
p. 16
pgs.
14, 16
pgs.
15, 17
p. 17
.
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