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12.7 GROUP CALL
This feature allows the user to contact a group of specific vessels (example
members of a yacht club) with a Group MMSI number using the Group call
function to automatically switch to a desired channel for voice communications.
This function is very useful for yacht clubs and vessels traveling together that
want to collectively make announcements on a predetermined channel. The
GX1150 can store up to 20 Group call entries.
12.7.1 Setting up a Group Call
For this function to operate the same Group MMSI must be programmed into
all the DSC VHF radios within the group of vessels that will be using this fea-
ture. To understand about Group MMSI programming, first a Ship MMSI has to
be understood.
Ship MMSI: The first three digits called a MID (Mobile Identity Group) of a Ship
MMSI denote the country the ship registered for a MMSI. 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 Ships ID for you.
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 USCG recommends programming the MID of a ships MMSI into the
Second, Third and Fourth digits of the Group MMSI as it denotes the area
the ship is located in.
The last 5 digits are decided upon by persons in the Group. This is an
important step as all radios in the Group must contain the same Group
MMSI so they can be contacted by each other. There is a chance that an-
other group of vessels may program in the same Group MMSI. If this hap-
pens, simply change one or more of the last 5 digits of the Group MMSI.
1. Press and hold down the
MENU" menu appears.
2. Press the
SETUP" menu.
3. Press the
with the
4. Press the
/
keys.
5. Press the
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key until "SETUP
/
keys to select "DSC
key, then select "GROUP DIR"
/
keys.
key, then select "ADD" with the
key.
GX1150
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