14. AIS, DSC MESSAGE
14-2
Note: This unit is equipped with the Blue Force Tracking (BFT) function.
Other AIS symbols that may appear are shown in the table below.
Lost AIS
target
An AIS target becomes a lost
target if a signal is not received
from the AIS target for x* min-
utes. The lost target symbol is
erased if a signal is not re-
ceived for an additional x* min-
utes.
*: The time depends on the AIS
transponder. Check the opera-
tor’s manual for your AIS tran-
sponder for information about
lost targets.
No CPA/
TCPA
target
AIS symbols are shown in bro-
ken lines in the following cas-
es:
• No water or ground tracking
speed of your ship, or there
is no speed data. All AIS
symbols are shown in bro-
ken lines.
• No speed data from AIS tar-
get. The symbol of the corre-
sponding AIS target is
shown in broken lines. A tar-
get with neither a reported
heading nor COG is oriented
toward the top of the opera-
tional display area.
Symbol Meaning
AtoN
Base Station
Aircraft
SART
Target
type
Symbol Description
Symbol color
Blue: Class A AIS target
Green: Class B AIS target
Blue (hollow): BFT AIS target (see next page)
Cross mark color
Red
Class A AIS
(Symbol color: Blue)
Class B AIS
(Symbol color: Green)
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