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Page 98 CPV550
19. DIGITAL SELECTIVE CALLING
19.0 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 approximately 20 nautical miles.
NOTE
A DSC Warning sticker is included with
the CPV550. To comply with FCC
regulations this sticker must be mounted
in a location that can be easily viewed
from the location of the CPV550. Make
sure the chosen location is clean and dry
before applying the sticker.
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). It is planned that DSC will
eventually replace aural watches on distress frequencies and will be used to
announce routine and urgent maritime safety information broadcasts.
This system allows mariners to instantly send a distress call with GPS position
(when connected to the transceiver) to the 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, POSITION SEND, and
Group calls to or from another vessel equipped with a DSC transceiver.
19.1 MARITIME MOBILE SERVICE IDENTITY (MMSI)
19.1.0 What is an MMSI?
An MMSI (Maritime Mobile Service Identity) 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 CPV550 TO OPERATE THE DSC
FUCTIONS.
How can I obtain an MMSI assignment?
Boat US offers online registration of a MMSI. Visit www.boatus.com/mmsi
WARNING
STICKER