GX1700
Page 36
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 condi-
tions should be approximately 20 nautical miles.
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
System (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.
NOTE
A DSC Warning sticker is included with
the
GX1700
. To comply with FCC regula-
tions this sticker must be mounted in a lo-
cation that can be easily viewed from the
location of the
GX1700
.
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 OPER-
ATE DSC FUNCTIONS.
WARNING
STICKER