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2. RADAR, CHART RADAR OPERATION
2-13
2.10 How to Measure the Bearing to a Target
Use the Electronic Bearing Lines (EBLs) to take bearings of targets. There are two
EBLs, No. 1 and No. 2. Each EBL is a straight dashed line extending from the own
ship position up to the circumference of the radar picture. The two EBLs can be dis-
tinguished from each other by the different lengths of their dashes; the dashes on the
No. 2 EBL are longer.
Each EBL carries a range marker, or a short line crossing the EBL at right angles. Its
distance from the EBL origin is indicated at the VRM readout whether or not the cor-
responding VRM is displayed. The range marker changes its position along the EBL
with the rotation of the VRM control. To operate this marker, rotate the VRM rotary
control on the Control Unit, or put the cursor in the applicable VRM box and roll the
scrollwheel.
2.10.1 How to measure the bearing
How to measure the bearing from the Control Unit
1. Press the EBL 1 or EBL 2 key to display desired EBL.
2. Rotate the EBL rotary control to bisect the target with the EBL. Read the bearing
to the target at the appropriate EBL box.
To erase an EBL, press the EBL 1 or EBL 2 key to erase appropriate EBL.
How to measure the bearing from the trackball module
1. Click the title bar on a EBL box to activate the corresponding EBL.
2. Spin the scrollwheel or use the trackball to bisect the target with the EBL.
3. To anchor the EBL, push the left button.
To turn off an EBL, click the arrow in applicable EBL box. The EBL disappears and the
EBL box is minimized.
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Target
EBL2
EBL1
Range marker
EBL1
EBL2
EBL bearing
128.0°
R
100.8°
R
EBL reference