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6 GMR 21/41 Owner’s Manual
basIc oPeratIon > radar Page
Target Expansion Off Target Expansion On
Trails
Trails allows you to select whether all returns on the screen leave a
history trail, and allows you to determine the length of the history
trail (Off, Short, Medium, or Long).
Trails On Trails Off
Guard Zone
A Guard Zone is a user-dened area of protection. If a target enters
the Guard Zone, an alarm sounds. You can dene two Guard Zones.
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
To Dene a Guard Zone:
1. Highlight Show Guard Zone 1 or 2, and press ENTER.
2. Highlight Adjust, and press ENTER.