Group Call; Group Call Setup - Standard Horizon Explorer GPS GX1700 Owner's Manual

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
up Menu " appears.
2. Press the
SETUP " menu.
3. Press the
RECTORY " with the
4. Press the
Page 54
key until " Set-
/ key to select " DSC
soft key, then select " GROUP DI-
/ key.
soft key, then select " ADD " with the
-Setup Menu-
GENERAL SETUP
CH Function Setup
DSC Setup
Waypoint Setup
-Setup Menu-
GPS Setup
General Setup
MMSI Setup
CH Function Setup
QUIT
SELECT
DSC SETUP
Waypoint Setup
GPS Setup
MMSI Setup
SELECT
/
QUIT
key.
GX1700