POLMAR Shark2, Руководство пользователя

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5 dIGITAl sElEcTIvE cAllING
5.1 General
DSC(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 had also been designated part of the Global Maritime Distress and Safety
System (GMDSS).
It is planed that DSC will eventually replace aural watches on distress fre -
quencies and Will be used to announce routine and urgent maritime safety
information broadcasts.
This new service will also allow mariners to initiate or reveive distress, ur -
gency, safety and routine calls to or from another vessel equipped with a DSC
transceiver.
5.1.1 maritime mobile service Identity
An MMIS is a nine-digit number used on Marine T ransceiver capable of
using Digital Selective Calling (DSC). This number is used to make selective
calls to other vessels. Refer to section 6.12 (USER MMSI ENTRY).
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 very
but under normal conditions should be approximately 20 nautical miles.
5.2 dsc call types
press the DSC/MENU key to pop up the menu for user to select the DSC
call type to send. Note that only three calls can be shown at any one time on
the screen.
Press + /- or rotate the CH knob scroll up and down the call types until the
cursor is positioned at the desired option.
Press the CH key the call types are: