Garmin GMR 21, Owner'S Manual, Page: 14 / 32

10 GMR 21/41 Owner’s Manual
GMR 21/41 O
PERATION
> T
HE
R
ADAR
A
DJUSTMENT
M
ENU
To Define a Guard Zone:
1. Use th e Rocker to highlight Show Guard Zone 1 or 2, and
press ENTER .
2. Use the Rocker to highlight Adjust and press ENTER .
3. Using the Rocker, define the area on the Radar Page.
4. Press ENTER to accept the change.
With a Guard Zone selected on the Radar Page, soft key options may
be available.
VRM/EBL
The VRM (Variable Range Marker) and EBL (Electronic Bearing
Line) tools measure range and bearing to a target. The center point
of the VRM can be moved, allowing measurement from one target to
another. Two V/E tools can be active at the same time.
The VRM/EBL Menu has two areas, “VRM/EBL 1” and “VRM/EBL
2.” Each area has two settings, Show/Hide and Adjust .
To activate VRM/EBL 1 or 2:
Use the Rocker to highlight Show VRM/EBL 1 or 2 and press
ENTER .
The diameter of the VRM and the angle of the EBL are adjustable.
To adjust the VRM/EBL:
1. Use the Rocker to highlight Adjust and press ENTER .
2. Press the Rocker right or left to rotate the Electronic Bearing
Line around the center point of the VRM.
3. Press the Rocker up or down to increase or decrease the size
of the Variable Range Marker.
4. Press ENTER to accept the changes.
Variable Range Marker
(VRM)
Electronic Bearing Line
(EBL)