Standard Horizon GX2400GPS, Owner'S Manual

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After the GX2400 transmits, the radio waits for the
DSC radio on the AIS ship to transmit a reply, at which
time the radio will ring like a telephone. Pick up the
microphone, press the PTT switch and talk to the AIS
vessel.
7. Press the [ QUIT ] soft key to return to AIS screen.
8. Press the [ CLEAR ] key to return to radio operation.
14.2.4 CPA/TCPA Alarm Functions
The CPA (Closest Point of Approach) alarm sounds when other AIS vessels
enter within the range set as the CPA Limit. For details, refer to section “ 14.3.1
CPA ”.
The TCPA (Time to Closest Point of Approach) alarm sounds according to the
time set as the TCPA Limit which is the time taken until other AIS vessels enter
within the range set as the CPA Limit. For details, refer to section “ 14.3.2 TCPA ”.
1. If other AIS vessels approach your ship, the alarm
sounds according to the CPA Limit and TCPA Limit
that you set in advance.
2. Press any key to stop the alarm.
The targets for the CPA/TCPA alarm will appear with
“ ” and flash.
Up to 15 targets for the CPA/TCPA alarm can be shown on the screen.
NOTE : If the display is in a mode other than AIS, the radio automatically switches
to the AIS mode.
3. On the display you will notice 3 soft key selections.
These selections are described below:
[ INFO ]: Pressing this key shows the information
screen of the CPA/TCPA alarm targets.
[ CALL ]: Pressing this key switches the screen to the
setting screen for transmitting individual DSC
calls.
[ EXIT ]: Press this key to return to AIS screen.
4. To transmit individual calls to the CPA/TCPA alarm targets, follow steps
4 through 8 in “ 14.2.3 Transmitting an Individual Call to an AIS Ship ”