24
6
ATA/AIS
• Activated target
ROT (Rate of Turn)
SOG (Speed Over Ground) and
COG (Course Over Ground) vector
Heading line
■
Plots (AIS)
■
Status of the vessel icon
The plot displays the activated vessel or SART’s past
positions as 5 dots, during each specified tracking in-
terval.
• The target track may change, depending on the TARGET
TRACK setting. (see TARGET menu, pp. 7, 19)
Target goes straight.
Target turns right.
Target reduces speed.
Target increases speed.
Sleeping target:
The AIS signal has been updated (received),
but the distance from your vessel is far, or you
set it as ‘sleeping.’ The target is displayed as
just a triangle without a heading or vector line.
Activated target:
The target is displayed with the heading line,
SOG (Speed Over Ground), COG (Course
Over Ground) vector and ROT (Rate of Turn).
Dangerous target:
Even if the target’s status is sleeping or acti-
vated, when it enters your CPA and TCPA limit
settings, the target is displayed with a thick
line.
Selected target:
The target’s information is displayed in the
data area.
Lost target*:
When the AIS signal has not been updated
(received) for a specific time period, the target
triangle is marked with a diagonal line.
If the AIS signal has still not been updated
(received) for 6 minutes and 40 seconds, the
target icon disappears.
There are 5 kinds of target vessel status.
* A vessel is regarded as a “Lost target” after a specified pe-
riod of time has passed since the vessel last transmitted
data. (p. 6)
If there is no heading data, the line points
in the direction of the COG.
