6. RADAR
6-35
6.28.2 How to manually acquire a target
You can manually acquire a target from both the radar display and the radar display
overlay. Up to 30 targets can be acquired manually. Tap the target to acquire to show
the pop-up menu, then tap [Acquire].
After you acquire a target, the radar marks the target with a broken square and a vec-
tor appears within 30 s (default setting). The vector indicates the direction of the target.
Within 90 s after you acquire the target, the first tracking step is finished and the target
is tracked continuously. At this point, the broken square changes to a solid circle.
Note 1: For successful acquisition, the target must be within 0.05 to 16 NM from your
ship and not hidden in sea or rain clutter.
Note 2: When the capacity for manual acquisition is reached, you cannot acquire
more targets. Cancel tracking of non-threatening targets to acquire additional targets
manually.
6.28.3 How to automatically acquire a target
Any target that enters the ARPA acquisition area is acquired and tracked automatical-
ly. When a target enters the area, the buzzer sounds. To disable the buzzer, set
[Alarm] to [OFF] in the pop-up menu at step 2 in the below procedure.
1. Create a guard zone referring to section 6.14.
2. Tap a line on the guard zone to show the pop-up menu.
Turn on [Auto Acquire]. The dotted lines for the guard
zone turn into solid lines.
3. Turn on [Auto Acquire].
The dotted lines for the guard zone turn into solid lines.
ARPA Symbol Meaning ARPA Symbol Meaning
At acquisition of the tar-
get.
30 s after the acquisi-
tion, the plotting symbol
changes to a small cir-
cle, which indicates
steady-state tracking. A
vector (dashed line)
shows the direction of
the target.
A lost target is indicated
by a diamond symbol,
created from two equal
triangles.
A target that meets the
criteria of the CPA/
TCPA alarm is changed
to a dangerous target.
Color: green
Color: green
Vector
Color: green
Color: red
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