User Manual Part 2

3. ARPA OPERATION

3-2

3.3 ARPA Display On/Off

You can turn the ARPA display on or off. The system continuously tracks ARPA tar-

gets regardless of this setting.

1. Press the MENU key to open the menu.

2. Use the Cursorpad (S or T) to select [ARPA] and press the ENTER key.

3. Use the Cursorpad (S or T) to select [Display] and press the ENTER key.

ARPA-Display options

4. Use the Cursorpad (S or T) to select [Off] or [On] then press the ENTER key.

5. Press the MENU key to close the menu.

3.4 How to Acquire and Track the Targets

Ten targets are acquired and tracked manually or automatically.

3.4.1 Manual acquisition

You can acquire up to ten ARPA targets. When the automatic acquisition ([Auto Ac-

quisition] on the [ARPA] menu) is set to on, you can manually acquire up to five tar-

gets.

1. Use the Cursorpad to put the cursor on the target to acquire.

2. Press the ENTER key.

The ARPA target symbol changes over time as below. A vector which indicates the

motion direction of the target appears approximately one minute after acquisition.

ARPA target symbol

Target number

River and Sea (Non-IEC system): An acquired target gets the youngest unused

number. When a target is lost and disappears from the number list, the next acquired

target takes the number of that lost target (ie; In a 5 target list, if the target 2 is lost, the

next acquired target takes the number of target 2).

IEC and Russian-River (IEC system): An acquired target gets the youngest unused

number. When a target is lost and disappears from the number list, the next acquired

target takes the next sequential number until reaching a maximum 10. If the target

number reaches a maximum 10, the next acquired target takes the number of a pre-

viously lost target.

t acquisition

1 min. after

acquisition

3 min. after

acquisition

Target number

Vector