Furuno FM-4721 Operator's Manual page 42

Group MMSI:
• Group MMSI numbers are not assigned by the FCC or other organizations licensed
to assign ship MMSI.
• The first digit of a Group call MMSI is always set to "0" as required by international
regulations. All FURUNO radios automatically have "0" as the first digit in a Group
call MMSI.
• The USCG recommends programming the MID of a ship MMSI into the second,
third and fourth digits of the Group call MMSI as it denotes the area the ship is lo-
cated.
• The last five digits are decided by persons in the group. This is an important step as
all radios in the group must contain the same Group call MMSI so they can contact
one another. There is a chance that another group of vessels has the same Group
call MMSI as yours. If this happens, simply change one or more of the last five digits
of the Group call MMSI.
1. Press and hold down the CALL/MENU key until the
[Setup Menu] appears.
2. Rotate the CH knob to select [DSC Setup] menu then
press the [SELECT] soft key.
3. Select [Group Directory] with the CH knob then press
the [SELECT] soft key.
4. Select [Add] with the CH knob then press the [SE-
LECT] soft key.
5. Enter the first letter of the name of the group you want
to reference in the directory.
Example: Press the 4/DIM key repeatedly to toggle
among the seven available characters associated with
that key: 4 → G → H → I → g → h → i → 4...
6. Press the ENT key to save the first letter in the name and move to the next letter
to the right.
7. Repeat steps 5 and 6 to complete the name. The name can have a maximum of
11 characters. Press the ENT key to move to the next space. This method can
also be used to enter a blank space in the name. If you enter a wrong character,
press the [BACK] soft key until the wrong character is selected, then enter the cor-
rect character.
8. After the name has been entered, press and hold the ENT key to advance to the
Group call MMSI number entry (ID line).
9. Enter the MMSI number (nine digits: first digit permanently set to "0"). If you enter
a wrong digit, press the [BACK] soft key until the wrong digit is selected, then
press the correct numeric key.
10. Press and hold the ENT key to save the data.
11. Press the [QUIT] soft key several times to return to radio operation.
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3. DIGITAL SELECTIVE CALLING
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