Furuno RP-250 manual AIS System Messages, AIS system messages, Message Meaning

7. AIS OPERATION

7.14AIS System Messages

AIS system messages are displayed at the bottom right corner of the screen. The table below shows the AIS system messages and their meanings.

	AIS system messages
Message	Meaning
ARPA FUSION	ARPA target converted to AIS target. The indication
	disappears when the target no longer meets the
	criteria set in paragraph 7.13. When the message
	RECEIVE is displayed, ARPA FUSION is not
	displayed.
COLLISION	CPA/TCPA of an AIS target is below preset value.
LOST	Lost target
RECEIVE	Not receiving AIS data
WT	This message appears when the water tracking
	mode is set at the radar and the data necessary for
	STW and CSE are not available. In this case the
	vector on the AIS symbol does not appear and SOG
	(speed over ground) and COG (course over ground)
	are displayed on the basic display.
GUARD	Displayed when a target enters the ARPA guard
	ring.
CPA/TCPA	CPA/TCPA cannot be calculated because the “WT”
	alarm has been violated. Further the CPA/TCPA
	value in basic data display is marked with an
	asterisk to indicate that CPA/TCPA value is not
	reliable.
FULL	Displayed when 1000 AIS targets have been
	received. (The radar can only display 1000 AIS
	targets closest in range to own ship.)

43