Standard Horizon HX870 Owner's Manual page 60

If the HX870 does not receive position data from the polled vessel, the
display will show "NO POSITION DATA".
Position Request by Manually Entering an MMSI
This feature allows you to request the position of a vessel by manually enter-
ing the MMSI.
1. Press the MENU key to display "MENU",
select "DSC CALL" with the CH▼/CH▲/◄/►
key, then press the [SELECT] soft key.
2. Press the [SELECT] soft key, then press the
CH▼/CH▲ key to select "POS REQUEST".
3. Press the [SELECT] soft key.
4. Press the CH▼/CH▲ key to select "NEW ID",
then press the [SELECT] soft key.
5. Press the CH▼/CH▲ key to select the first
number of the MMSI (nine digits) 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 [YES] soft key to transmit the position request DSC call.
9. When the HX870 receives the position from the polled vessel it is shown
on the radio display.
10. Press the [QUIT] soft key to return to radio operation.
The received position from the polled vessel can be transferred to a
GPS chart plotter via NMEA DSC and DSE sentences.
Page 60
NOTE
HISTORY
MEMORY
NEW ID
BACK
POS REQUEST CALL
CATEG:
transmit a Call?
YES
NOTE
INDIVIDUAL
GROUP
ALL SHIPS
POS REQUEST
POS REQUEST
POS REPORT
DIST ALERT MSG
BACK
POS REQUEST
SELECT
987654321 1 2
SAFETY
BACK
POS REQUEST CALL
Do you want to
CATEG:
NO
SINCE:
Waiting for ACK
RESEND
DSC CALL
SELECT
MMSI
98765432 -
3 4 5 6 7 8 9 0
Delete
FINISH SELECT
987654321
ROUTINE
00:05
QUIT
HX870