Group Call - Standard Horizon HX851 Owner's Manual

7.7 GROUP CALL

This feature allows the user to contact a group of specific vessels (example
members of a yacht club) using DSC radios with Group call function to auto-
matically switch to a desired channel for voice communications. This function
is very useful for yacht clubs and vessels traveling together that want to collec-
tively make announcements on a predetermined channel. The HX851 can
memorize up to 8 group address.
7.7.1 SETUP 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 the specific ship ID assigned to your vessel.
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
another group of vessels may program in the same Group MMSI. If this
happens, simply change one or more of the last 5 digits of the Group MMSI.
1. Press and hold the
appears.
2. Press the
3. Press the
with the
4. Press the
5. Select "Add Add" with the
Add Add Add
the key.
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key until "Setup Menu
key to select "DSC Setup DSC Setup" menu.
DSC Setup DSC Setup
DSC Setup
key, then select "Group Directory
/ key.
key.
/
Setup Menu" Setup Menu Setup Menu Setup Menu
Group Directory" Group Directory Group Directory Group Directory
key, then press
HX851