Furuno FEA-2107 - Dangerous AIS Targets; Lost AIS Targets; Displaying True or Relative Speed Vectors

21. AIS Target Functions
21-3
21.2.1 Dangerous AIS targets
A dangerous AIS target is displayed as a blinking target symbol, in green and red alternately. You can set CPA and
TCPA limits used by the ECDIS in the Danger Targets page of the Voyage Recording dialog box. For further
details, see “Setting conditions of viewing and logging danger targets” on page 21-6.
21.2.2 Lost AIS targets
A lost AIS target is displayed as a blinking target symbol, in green and dark yellow alternately. Timeout for
displaying AIS target as 1
st
AIS target:
Vessel speed (kt) Period of time out
At anchor 18 min
0-14 60 sec
14-23 36 sec
>23 12 sec
Lost AIS target symbol will be automatically removed from display if the state “Lost AIS target” for the AIS target
has been in effect 430 seconds. Exception is if the vessel is at anchor, then the time is 36 minutes.
21.2.3 Displaying true or relative speed vectors
AIS targets vector can be displayed relative to own ship's heading (RelVect) or with reference to the North
(TrueVect).
Vector time (or the length of vectors) and presentation mode can be set on the status bar, at the locations circled in
the illustration below.
True Vect(G) 12 nm
Past PosnTrue 2 min
CPA 1.5 nm 10 min
Note that the above indications are black (or white depending on color scheme) or red depending on chosen display
mode of own ship:
• If the display mode is true motion, the indication TrueVect is displayed in black (or white depending on color
scheme), and the indication RelVect is displayed in orange.
• If the display mode is relative motion the indication TrueVect is displayed in orange, and the indication RelVect
is displayed in black (or white depending on color scheme).