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GMR 21/41 Owner’s Manual 7
basIc oPeratIon > radar Page
3. Using the ROCKER, dene the area on the Radar Page by
adjusting three points: Corner 1, Corner 2, and Circular.
4. Press ENTER to set the Guard Zone.
VRM/EBL
The Variable Range Marker (VRM) and Electronic Bearing Line
(EBL) tools measure range and bearing to a target. You can move
the center point of the VRM, which allows you to measure from one
target to another. Two VRM/EBL tools can be activated at the same
time.
The VRM/EBL option has two tools, VRM/EBL 1 and VRM/EBL 2.
EachVRM/EBL tool has two settings, Show (Hide) and Adjust.
Variable Range Marker (VRM) Electronic Bearing Line (EBL)
To enable VRM/EBL 1 or VRM/EBL 2:
On the Radar adjustment menu, highlight Show VRM/EBL 1
or VRM/EBL 2, and then press ENTER.
You can adjust the diameter of the VRM and the angle of the EBL.
To adjust the VRM/EBL:
1. Highlight Adjust, and press ENTER.
2. Press right or left on the ROCKER to rotate the EBL around
the center point of the VRM.
3. Press up or down on the ROCKER to increase or decrease
the size of the VMR.
4. Press ENTER to accept the changes.
To move the center location of the VRM:
1. Highlight Move, and press ENTER.
2. Using the ROCKER, move the center point of the VRM to the
selected location.
3. Press ENTER to set the new location.
To use the VRM/EBL, expand the diameter of the VRM so that the
outer edge touches the target. Rotate the EBL until it intersects the
VRM at the target location. The measured range and bearing are
shown in the lower-left corner of the screen.