Radar: Target history
The GB40 stores the history of all the tracked targets for a period
of time (specified by the vector length setting) and can show this
history as a graphical representation.
You can switch the history On or Off. Off is the default.
¾
To show or hide the history of all tracked targets:
• Display the Radar screen and main menu.
• Select MARPA. If you can't see MARPA, select Return.
• The
Target History button shows the current setting. Select
it to change the setting.
8.16 Radar: Guard zones
Use either or both of the two radar guard zones to notify you when
a target enters or exits a specified area around your vessel.
When the radar guard zone is On, the specified area around your
vessel that is defined by the radar guard zone is highlighted on the
Radar screen.
The radar guard zones are different from the chart guard zone.
Use both types of guard zone to help ensure the safety of your
vessel.
Radar: Guard zones - on/off
Two radar guard zones are available, Guard Zone 1 and Guard
Zone 2. You can turn either OR both of the radar guard zones On
or Off.
If you turn a radar guard zone Off, it's immediately
removed from all the
Radar screens and any targets within
that radar guard zone are no longer monitored.
¾
To turn a radar guard zone on or off:
• Display the Radar screen and main menu. If you can't see the
Guard Zones button, select Return.
• Select
Guard Zones.
• The
Guard Zone 1 button shows the current setting for
guard zone 1. Select it to change the setting.
The
Guard Zone 2 button shows the current setting for
guard zone 2. Select it to change the setting.
The new setting is applied immediately and stays until you
change it again.
126 | Radar
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