Filter
Top Products
5-9
Note: If you wish to create an auto acquisition area having a 360-degree coverage
around own ship, set point B in almost the same direction (approx. ±5°) as point A and
press the [ENTER] key.
8. Repeat steps 5 to 7 above if you want to set another auto acquisition area with the
trackball.
9. Press the [1] key followed by the [PLOT MENU] key to close the ARPA 1 menu.
An auto acquisition area like the example shown in Figure 5-5 appears on the display.
Note that each auto acquisition area has a fixed radial extension (width) of 0.5-1.0 nm.
Note that the auto acquisition areas are preserved in an internal memory of the ARPA
even when auto acquisition is disabled or the ARPA is turned off.
5.5.3 Terminating tracking of targets
When the ARPA has acquired 20 targets automatically, the message AUTO TARGET FULL
is displayed at the screen center and no more auto acquisition occurs unless targets are
lost. You may find this message before you set an auto acquisition area. Should this hap-
pen, cancel tracking of less important targets or perform manual acquisition.
Canceling individual targets
Use the trackball to place the cursor (+) on a target to cancel tracking. Press the [TARGET
CANCEL] key.
Canceling all targets at a time
Press and hold the [TARGET CANCEL] key down more than 3 seconds. In the automatic
acquisition mode, acquisition begins again.
5.6 Manual Acquisition
In the auto acquisition mode (AUTO ACQ ON), up to 20 targets can be manually acquired
in addition to 10 auto acquired targets. When auto acquisition is disabled (AUTO ACQ
OFF), up to 30 targets can be manually acquired and automatically tracked.
To manually acquire a target:
1. Place the cursor (+) on a target of interest by operating the trackball.
2. Press the [ACQ] key on the control head. The selected plot symbol is marked at the
cursor position.
Note that the plot symbol is drawn by broken lines during the initial tracking stage. 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 plot symbol blinks. It blinks until the [LOST TARGET] is pressed
(to acknowledge it as a lost target).