Filter
Top Products
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 S or T to select [ARPA] and press the ENTER key.
3. Use S or T to select [Display] and press the ENTER key.
ARPA Display options
4. Use 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 a maximum of ten ARPA targets. When the automatic acquisition
([Auto Acquisition] on the [ARPA] menu) is set to on, you can manually acquire a max-
imum of five targets.
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 shown below. A vector which indicates
the motion direction of the target appears approximately one minute after the acquisi-
tion.
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 five-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 un-
used number. When a target is lost and disappears from the number list, the next ac-
quired 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 previously lost target.
Off
On
A
t acquisition
1 min. after
acquisition
3 min. after
acquisition
01
Target number
Vector
01
01