Furuno NAVnet TZtouch2 - How to Manually Acquire a Target; How to Automatically Acquire a Target; How to Automatically Acquire Targets by Doppler

6. RADAR
6-31
6.27.2 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].
Note: For configurations using DRS4D-NXT or DRS6A-NXT sensors, the maximum
number of targets that can be acquired is 100.
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.
6.27.3 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.
6.27.4 How to automatically acquire targets by Doppler
With acquisition by Doppler active, you can track up to 100 targets in total as follows.
- 40 targets by auto acquire by Doppler
- 30 targets by auto acquire by guard zones
- 30 targets by manual tracking
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