Raymarine E120W Reference Manual page 179

Chapter 7: Using the Radar
maintained. A guard zone only operates when the whole zone is displayed on the
screen. An audible alarm sounds to alert you when a target enters the zone.
Guard zones are inactive for 10 seconds after being placed or re-sized, to avoid
inappropriate alarms whilst they are being positioned.
You can set up guard zones to be either sector zones or 360° (circular) zones. Your
radar can be set up using one or two zones.
You can adjust the sensitivity of the guard zone via the Alarms Setup Menu described
page 267
on
To set up a guard zone:
1. Select the guard zone option:
2. Select Zone 1 or 2:
You can now select the guard zone to be either a sector or a circular zone.
Sector guard zones
6nm Head-Up
To set up a sector guard zone:
.
TARGET
TRACKING
ZONE 1
ON
ZONE 2
ON
Toggle to ON
Relative Motion
MONITOR IN
ZONES...
SET UP ZONE 1
Or
SET UP ZONE 2
Rings 1nm
163
Sector
Guard Zone