Icom IC-M127

@ General
When an optional UX-130 osc unrr is installed, digital selec-
tive calling (or DSC) can be used via the transceiver. DSC is a
method of radio communications involving digital signals
rather than the more conventional method of voice communi-
cations. The advantage of using digital communications over
voice communications is that information (especially useful for
distress calls and other urgent matters) can be pre-pro-
grammed into a radio and transmitted accurately.
This sends distress information which hichides your vessel's ID (and Spe time data
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 p.18
so. The IC-M127 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. 15, 18)
_—_ae
DIGITALSELECTIVECALLNG 4
In addition, when a GPS receiver (NMEA0183 ver. 1.5, 2.0 or
2.1) is connected, your vessel's position is transmitted to-
gether with the vessel's identity when making a distress call.
See p. 38 for unit installation.
This allows you to send a signal to a specific vessel only. The transceiver can store up to 10 des-
tination ID channels—select the desired ID in advance. Two kinds of acknowledgements (able to a
iP 4 ick pier 16, 19)
comply/unable to comply) are available (for sending or receiving) after an individual call.
This is used for announcement to all ships in the specified area—when a GPS receiver is p. 19
connected calls directed to areas other than yours are rejected. Receive only for the IC-M127.|""