Onwa Marine Electronics KR-12X8 - Manual (Page 25)

2.15 Erasing the Heading Line
The heading line may occasionally mask a target. To view the target, you can
temporarily erase the heading line by pressing and holding down the [GAIN (HM
OFF)] control. Release the control to re-display the marks.
Automatic adjustments of A/C SEA and A/C RAIN
Push the [A/C Auto] key. "A/C Auto" at the bottom left-hand corner of
the display when the A/C AUTO circuit is on. You can fine tune by adjusting the
[A/C SEA], [A/C RAIN] and [GAIN] controls.
appears
2.16 Measuring the Range
By range ring
By cursor
You can measure the range to a target three ways: by the range rings, by the
cursor, and by the VRM (Variable Range Marker).
Count the number of rings between the center of the display and the target.
Check the range ring interval and judge the distance of the echo from the echo
Operate the omnipad to place the cursor intersection on the inside edge of the
target echo, The range to the target, as well as the bearing, appears at the
bottom right-hand corner of the display.
from the inner edge of the nearest ring.
Heading
Line
Figure 2-6 Heading line
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