Garmin gmr 21 User Manual
GMR 21/41 Owner’s Manual
9
GMR 21/41 O
PERATION
>
T
HE
R
ADAR
A
DJUSTMENT
M
ENU
Trails
When the Trails function is on, all returns on the display leave a
history trail. The Trails setting determines the length of the history
trail. The Trails setting has four presets: Off, Short, Medium, and
Long.
To change the Trails setting:
1. Use the
Rocker to select a new setting.
2. Press
ENTER to accept the change.
Trails Off
Trails On (medium)
To clear the Trails, select Clear Trails on the Adjustment Menu, or
press the Clear Trails soft key.
Guard Zone
A Guard Zone is a user-defined area of protection. If a target enters
the defined Guard Zone, an alarm is sounded. Two Guard Zones can
be defined at any given time.
The Guard Zone Menu has two areas, “Guard Zone 1” and “Guard
The Guard Zone Menu has two areas, “Guard Zone 1” and “Guard
Zone 2.” Each area has two settings, Show/Hide and Adjust.
Guard Zone
continued