Onwa Marine Electronics KR-12X8 - Manual (Page 70)

ARPA MENU Operation
The ARPA MENU operation includes the followings;
Display: Turns on/off the plot symbols, past positions and target data.
All Cancel: Cancels the tracking of all targets.
Vector Ref: Selects relative vector or true vectors. To select your choice, open
the ARPA menu, and the legend Rel and True appear on the "3. Vector Ref"
line. Operate the omnipad. When your selection is in the reverse video, press the
[ACQ/ENTER] key.
Vector Length: Selects vector time.
History Selects past position plot interval.
CPA Set: Selects CPA alarm limit, When a target is predicted to come within
this limit, an aural alarm sounds and at the same time the corresponding target
symbol changes to a blinking triangle.
Note: If the preset CPA limit is set at OFF, a target which is on collision course
will not produce an alarm.
TCPA Set: Selects TCPA alarm limit.
Auto ACQ: Turns on/off Auto Acquisition Area.
Activating the Auto plotter
To activate the Auto Plotter, follow the steps shown below:
1. Adjust the GAIN, A/C SEA and A/C RAIN controls for proper radar picture.
2. Press the [MENU] key to open the main menu.
3. Operate the omnipad to select "ARP MENU".
4. Press the [ACQ/ENTER] key. The menu shown in Figure AP-1 appears.
5. Operate the omnipad to select the menu item "Display".
6. Operate the omnipad to select "On".
7. Press the [ACQ/ENTER] key.
8. Press the [MENU] key to close the menu.
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