Furuno RP-340, Operator'S Manual

Page: 62 / 84

4 AIS OPERATION
56
4.12 AIS System Messages and Alarms
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
A-FSN ARPA target converted to AIS target. The indication
disappears when the target no longer meets the
criteria set in paragraph 4.11. When the message
A-RCV is displayed, A-FSN is not displayed.
A-CLSN CPA and TCPA of an activated AIS target are below
value set on the menu.
A-LOST Lost target
A-RCV Not receiving AIS data
A-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.
A-GZ Displayed when a target enters the ARPA guard
zone.
A-CPA CPA/TCPA cannot be calculated because the
“A-WT” alarm has been violated. Further the
CPA/TCPA value in the basic data display is marked
with an asterisk to indicate that it is not reliable.
A-FUL Displayed when 1000 AIS targets have been
received. (The radar can only display 1000 AIS
targets closest in range to own ship.)
4.13 AIS Transponder Alarm Messages
The AIS3 menu provides AIS alarm message information ($AIALR sentence)
from the AIS transponder.
[AIS 3]
1 [AIS 2]
2 FUSION
OFF/ON
POSN 0.000NM
RNG
0.000NM
BRG 00.0
°
SPD 0.0KT
CSE 00.0
°
Alarm message area
AIS 3 menu