Standard Horizon GX2400GPS, Руководство пользователя

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11 DIGITAL SELECTIVE CALLING (DSC)
11.1 GENERAL
WARNING
This
GX2400
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.
Digital Selective Calling (DSC) 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 its own position,
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 Report, Automatic Position Polling, and Group calls
to or from another vessel equipped with a DSC transceiver.
11.2 DISTRESS ALERT
The GX2400 is capable of transmitting and receiving DSC distress messages.
Distress alerts transmitted from the transceiver include the latitude and longitude
of the vessel when valid GPS position data is being received.
11.2.1 Transmitting a Distress Alert
NOTE
To be able to transmit a DSC distress alert, the MMSI number must be
programmed, refer to section “ 8.6.1 Maritime Mobile Service Identity
(MMSI) ”.
In order for the ships location to be transmitted, the GX2400 must receive
valid position data from the internal GPS receiver or another GPS device
connected with a NMEA 0183 or NEMA 2000 network. Refer to section “ 8.5.2
Accessory Cables ”.