Standard Horizon QUANTUM AIS GX6000 Owner's Manual page 66

If a mistake was made entering in the MMSI number, rotate the DIAL/ENT
knob to select "←" or "→", press the [SELECT] soft key until the wrong
character is selected, then perform step 9.
10. When finished entering the MMSI number, press the [FINISH] soft key to confirm.
11. To store the data, select "SAVE", then press the [SELECT] soft key.
12. To enter another group address, repeat steps 2 through 11.
13. Press the CLEAR key to return to radio operation.
10.5.2 Transmitting a Group Call
Group Call using the Group Directory
[ ]  "DSC CALL"  "GROUP CALL"
1.
2. Rotate the DIAL/ENT knob to select "HISTORY" or
"MEMORY", then press the [SELECT] soft key.
3. Rotate the DIAL/ENT knob to select a group you want
to contact, then press the [SELECT] soft key
4. In the INTERSHIP CH list, rotate the DIAL/ENT knob
to select the operating channel on which you want to
communicate, then press the [SELECT] soft key. To
select operating channels from all voice channels,
press the [MANUAL] soft key.
5. Press the [YES] soft key to transmit the group call
signal.
6. When the group call signal is sent, the display will be
as shown in the illustration at the right.
7. After the group call is transmitted, all the radios in the
group will switch to the designated channel.
8. Listen to the channel to make sure it is not busy, then
press the microphone's PTT switch to communicate
with all of the vessels in the group.
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