GX1700
Page 54
9.7 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 col-
lectively make announcements on a predetermined channel. Up to 32 Group
MMSI may be programmed.
9.7.1 Group Call Setup
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
feature. To understand 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 dig-
its are specific to the Ships ID.
Ship MMSI Example
: If your MMSI is “366123456”, “366” is MID which de-
note the country and “123456” is your ships MMSI.
Group MMSI
:
Group MMSI numbers are not assigned by the FCC or other organiza-
tions 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 down the
key until “
Set-
up Menu
” appears.
2. Press the
/
key to select “
DSC
SETUP
” menu.
3. Press the
soft key, then select “
GROUP DI-
RECTORY
” with the
/
key.
4. Press the
soft key, then select “
ADD
” with the
/
key.
-Setup Menu-
CH Function Setup
DSC Setup
GPS Setup
MMSI Setup
Waypoint Setup
GENERAL SETUP
QUIT
SELECT
-Setup Menu-
CH Function Setup
GPS Setup
MMSI Setup
Waypoint Setup
QUIT
SELECT
General Setup
DSC SETUP