Standard Horizon MATRIX GX1280S, Owner'S Manual

Page: 30 / 72

GX1280S Page 30
6.8 POSITION REQUEST
The position request mode may be used to show the position of another
vessel that has a DSC radio with this feature. The other vessel must have an
operating GPS receiver connected to its DSC transceiver and must not have
its transceiver set to deny position requests. (Refer the section 7.5 to enter
information into the individual directory).
1. Select a traffic channel, then press the [ CALL/SET
]
key. The “DSC OPERATION” menu will appear in
the display.
2. Turn the CHANNEL selector knob to select the
“POS REQUEST.”
3. Press [ CALL/SET
] key to show the Position re-
quest directory. This directory uses the INDI-
VIDUAL Directory information.
4. Turn the CHANNEL selector knob to select a
name.
5. Press the [ CALL/SET
] key to transmit the posi-
tion request DSC call.
6. After a DSC position request is transmitted, the
transceiver remains on channel 70 until position
data is received.
7. The transceiver received position data from a ves-
sel.
8. If the transceiver does not receive a reply, the LCD
will display “>SEND” to prompt the user to send the call again or exit the
mode.
9. If the transceiver received no position data, the LCD will show “NO PO-
SITION DATA.”
10. When the transceiver receives the requested position, the transceiver
outputs a NMEA DSC sentence which may be used by a Standard Hori-
zon GPS chart plotter to show the vessels position.