User Manual

GX2000/GX2150Page 42
9 DIGITAL SELECTIVE CALLING
9.1 GENERAL
WARNING
This radio is designed to generate a digital maritime distress and safety
call to facilitate search and rescue. To be effective as a safety device,
this equipment must be used only within communication range of a shore-
based VHF marine channel 70 distress and safety watch system. The
range of signal may vary but under normal conditions should be ap-
proximately 20 nautical miles.
NOTE
A DSC Warning sticker is included with the
GX2000/GX2150. To comply with FCC
regulations this sticker must be mounted
in a location that can be easily viewed from
the location of the GX2000/GX2150.
Digital Selective Calling is a semi-automated method of establishing a radio
call, it has been designated by the International Maritime Organization (IMO)
as an international standard for establishing VHF, MF and HF radio calls. It has
also been designated as part of the Global Maritime Distress and Safety Sys-
tem (GMDSS).
Digital Selective Calling 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 or receive Distress, Urgency, Safety, Routine, Position Request, Posi-
tion Report, Automatic Position Polling and Group calls to or from another
vessel equipped with a DSC transceiver.
9.2 MARITIME MOBILE SERVICE IDENTITY
(
MMSI
)
9.2.1 What is an MMSI?
An MMSI is a nine digit number used on Marine Transceivers capable of using
Digital Selective Calling (DSC). This number is used like a telephone number
to selectively call other vessels.
THIS NUMBER MUST BE PROGRAMMED INTO THE RADIO TO OPERATE
DSC FUNCTIONS.
WA RNI N G
STICKER