Reference Manual Part 2

151 Chapter 11: Radar
Target tracking functions are used to help avoid collisions.
• Guard zones sound an alarm when an object comes within a
specified range.
• MARPA displays information about tracked objects.
• AIS displays the identity and voyage information of other AIS-
enabled vessels.
To track a target
1. Press the TARGET TRACKING softkey.
2. Highlight the object you wish to track.
3. Press the ACQUIRE TARGET softkey.
The ‘target being acquired’ icon is displayed, followed by the appro-
priate MARPA status icon.
Guard zones
A guard zone is a ‘protected’ area around your vessel: as soon as
an object (like another vessel) enters the zone, it triggers an alarm
on your Nav Station. Guard zones are managed from the Monitor in
Zones toolbar.
Guard zones can be either circular- or sector-guards, and you can
define up to two of them on your system.
You can adjust the sensitivity of guard zones on the Alarms Setup
Menu. For more information, see Alarm Setup Menu on page 194.
Guard zones only operate when the whole zone is displayed on the
screen. To avoid inappropriate alarms, they become active ten sec-
onds after being placed or edited.
To place a guard zone
1. Press the TARGET TRACKING softkey.
2. Press the MONITOR IN ZONES softkey.
3. Toggle ZONE 1 or ZONE 2 to ON, as appropriate.
4. Press the corresponding SET UP ZONE softkey.
5. Choose your zone shape.
6. Set the limits of the guard zone using the rotary controller.
7. Press OK.
6nm Head
-
Up
D6832-2
Circular
Guard Zone
6nm Head-Up Relative Motion
Rings 1nm
D6815_3
Sector
Guard Zone