Onwa KR-1338C, Руководство оператора

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2.13 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
garget 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.
By VRM
1. Press the [EBL/VRM SELECT] key to circumscribe a VRM readout (at the
bottom center).Each press of the key selects the readout of EBL1,EBL2,VRM1
or VRM2 in that order.
2. Press the [EBL/VRM CONTROL] key enable control of the VRM by the
omnipad.
3. Operate the omnipad to place the outside edge of the VRM on the inside
edge of the target.
4. Check the VRM readout at the bottom right-hand corner of the display to
find the range to the target.
5. To erase the VRM, press and hold down the [EBL/VRM CONTROL] key.
EBL
345.6 R
23.0 R
VRM
5.3 NM
12.5 NM
Figure 2-7 Display bottom, showing location
of EBL and VRM readouts
Heading
Line
North mark
Figure 2-6 Heading line and north mark
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