Standard Horizon HX870 Owner's Manual page 56

Group Call by Manually Entering an MMSI
This feature allows you to contact a group of vessels by entering in their group
MMSI manually.
1. Press the MENU key to display "MENU", then
select "DSC CALL" with the CH▼/CH▲/◄/►
key.
2. Press the [SELECT] soft key, then press
the CH▼/CH▲ key to select "GROUP". (To
cancel, press the [BACK] soft key.)
3. Press the [SELECT] soft key.
4. Select "NEW ID" with the CH▼/CH▲ key,
then press the [SELECT] soft key.
5. Press the CH▼/CH▲ key to select the first
number of the MMSI (nine digits: first digit
permanently set to "0") which you want to
contact, then press the [SELECT] soft key
to step to the next number.
6. Repeat step 5 to set the MMSI number.
If a mistake was made entering in the MMSI
number, press the CH▼/CH▲/◄/► key to
select "←" or "→", press the [SELECT] soft
key until the wrong character is selected,
then perform step 5.
7. When finished entering the MMSI number,
press the [FINISH] soft key.
8. Press the CH▼/CH▲ key to select the operating channel you want to
communicate on, then press the [SELECT] soft key.
9. Press the [YES] soft key to transmit the group call signal.
10. After the group call is transmitted, all the radios in the group will switch to
the designated channel.
11. Listen to the channel to make sure it is not busy, then press the PTT button
and talk into the microphone to the group of vessels.
Page 56
INDIVIDUAL
GROUP
ALL SHIPS
POS REQUEST
GROUP CALL
POS REPORT
HISTORY
DIST ALERT MSG
MEMORY
NEW ID
BACK
BACK SELECT
GROUP CALL
INTERSHIP CH
1
06
CH:
BACK
08
CH:
09
CH:
10
CH:
13
CH:
CATEG:
BACK SELECT
GROUP CALL
087654321
Horizon-Group
transmit a Call?
ROUTINE
CATEG:
YES
06
CH:
Transmitting
CATEG:
SINCE:
DSC CALL
SELECT
GROUP CALL
GROUP MMSI
08765432 -
2 3 4 5 6 7 8 9 0
Delete
FINISH SELECT
GROUP CALL
087654321
Horizon-Group
ROUTINE
06
CH:
Do you want to
NO
GROUP CALL
087654321
Horizon-Group
ROUTINE
06
CH:
00:05
Transmitted
QUIT
HX870