58
3. Rotate the
DIAL/ENT
knob to select “
OFF
”.
4. Press the [
ENTER
] soft key to store the selected setting.
5. Press the [
CLEAR
] key to return to radio operation.
To enable the ringer tone, repeat the above procedure, Rotate the
DIAL/ENT
knob to select “
ON
” in step 3 above.
11.5 GROUP CALL
This feature allows users to automatically contact a specific group of vessels
using DSC radios with the group call function. The called radios can automati
-
cally switch to the desired channel for voice communications. This function is
very useful for yacht clubs and vessels traveling together that want to make
communal announcements on a predetermined channel. Up to 30 group MMSIs
may be programmed.
11.5.1 Setting up a Group Call
For this function to operate, the same group MMSI (Maritime Mobile Service
Identity Number) must be programmed into all the DSC VHF radios within the
group of vessels that will be using this feature. To understand Group MMSI
programming, first a ship MMSI has to be understood.
Ship MMSI
: The first three digits called MID (Mobile Identity Group) of a ship
MMSI denote the country where the ship’s MMSI is registered. The last 6 digits
are specific to the ships ID.
Ship MMSI Example
: If your MMSI is “366123456”, “366” is MID which denote
the country and “123456” is the vessel’s MMSI.
Group MMSI
:
Group MMSI numbers are not assigned by the FCC or other organizations
licensed to assign ship MMSI numbers.
The first digit of a group MMSI is always set to “0” by International rules. All
Standard Horizon radios are preset so when programming a group MMSI
the first digit is set to “0”.
The ITU (International Telecommunication Union) recommends program-
ming the MID of a ship MMSI into the Second, Third and Fourth digits of
the group MMSI as it denotes the area where the ship is located.
The last 5 digits are decided upon by persons in the group. This is an impor
-
tant step as all radios in the group must contain the same group MMSI in
order to be contacted by each other. There is a chance that another group of
vessels may program the same group MMSI. If this happens, simply change
one or more of the last 5 digits of the group MMSI.
Summary of Contents for GX2400GPS
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