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3. ARPA OPERATION
3-3
3.4.2 Automatic acquisition
When you set an automatic-acquisition area, the ARPA can acquire a maximum of five
targets automatically.
The automatic acquisition area is 2.0 to 2.5 nm in range and ±45° on either side of the
heading line in bearing. When you change the automatic acquisition to the manual ac-
quisition, targets tracked in automatic acquisition are continuously tracked.
Automatic acquisition area
1. Press the MENU key to open the menu.
2. Use S or T to select [ARPA] and press the ENTER key.
3. Use S or T to select [Auto Acquisition] and press the ENTER key.
Auto Acquisition options
4. Use S or T to select [On] and press the ENTER key.
5. Press the MENU key to close the menu.
3.5 How to Stop the Tracking of ARPA Target
When ten targets have been acquired, there is no more acquisition, unless targets are
cancelled. If you acquire additional targets, you must cancel one or more separate tar-
gets, or all targets. Use one of the following procedures.
3.5.1 How to stop the tracking of selected targets
1. Use the Cursorpad to put the cursor on the target to cancel the tracking.
2. Press the CANCEL/HL OFF key to cancel the tracking and erase the ARPA sym-
bol. The unit beeps twice and the symbol is erased from the screen.
3.5.2 How to stop the tracking of all targets
1. Press the MENU key to open the menu.
2. Use the CursorPad to put the cursor on the target to cancel the tracking.
3. Use S or T to select [ARPA] and press the ENTER key.
Automatic acquisition area
45° port
45° starboard
2.0 - 2.5 nm
Heading line
Off
On