Furuno FR-7112 - Manual (Page 42)

6-4
Note 3: When auto acquisition mode (Auto
ACQ) is on, up to five targets can be acquired.
For details, see 6.5 Automatic Acquision.
WARNING
When a tracked target nears another
tracked target, the targets may be
"swapped." When two targets come close
to each other, one of the two can become
a "lost target." Should this happen,
reacquisition of the "lost target" is required
after the two targets have separated.
6.5 Automatic Acquisition
The ARP-10 can acquire up to five targets au-
tomatically by setting the Auto Acquisition area
predefined in the system. If Auto ACQ is se-
lected after more than five targets have been
manually acquired, only the remaining capac-
ity of targets can be automatically are acquired.
For example; when seven targets acquired
manually, then the Auto ACQ is switched on,
only three targets can be acquire automatically.
When five targets have been automatically ac-
quired, “AUTO TARGET FULL” message ap-
pears at top left corner seven on the display.
Setting auto acquisition area
Auto acquisition area is predefined between 2.0
and 2.5 nm in range and 45º on either side of
the heading maker in bearing. If a target comes
into this area, it is acquired automatically.
Figure 6-4 Auto acquisition area
Follow the steps below to activate the auto ac-
quisition area.
1. Open the “ARP-10 MENU”.
2. Select “8. Auto ACQ” by operating the
trackball.
3. Operate the trackball to select “On”.
4. Press the [ACQ/ENTER] key.
5. Press the [MENU] key to close the menu.
Deactivating the auto plotter
1. Press the [MENU] key.
2. Open the “ARP-10 MENU”.
3. Operate the trackball to select the “1. Dis-
play”.
4. Operate the trackball to select “Off”.
5. Press the [ACQ/ENTER] key.
6. Press the [MENU] key to close the menu.
6.4 Manual Acquisition
Follow the steps below to manually acquire a
target. Up to 10 targets can be manually ac-
quired.
1. Place the cursor (+) on a target of interest by
operating the trackball.
2. Press the [ACQ/ENTER] key.
The plot symbol changes its shape according to
the status as below. A vector appears in about
one minute after acquisition indicating the
target’s motion trend. If the target is consistently
detected for three minutes, the plot symbol
changes to a solid mark. If acquisition fails, the
target symbol blinks and disappears shortly.
SQUARE (dotted)
Immediately after acquisition - Plot symbol
shown in broken lines.
SQUARE (dotted with a vector)
One minute after acquisition - Vector still unre-
liable.
CIRCLE (Solid with a vector)
3 minutes after acquisition - Plot symbol
changes to a solid circle indicating the stable
tracking condition.
LARGE SQUARE
The plot symbol of a target being tracked be-
comes twice as large as the normal symbol when
the target is selected for data reading.
Note 1: The target to be acquired should be
within 0.2 to 16 nm from own ship and not ob-
scured by sea or rain clutter.
Note 2: When you want to acquire 11th target,
cancel tracking one of less important targets.