How To Activate Or Deactivate The Guard Zone; How To Hide The Guard Zone; Guard Zone Menus; Echo Trails - Furuno TZT9 Operator's Manual

6. RADAR
6.12.2

How to activate or deactivate the guard zone

1. Select [Guard Zone] from the RotoKey menu.
2. Select [Alarm]. The dotted lines for the guard zone turn to solid lines.
If a target enters the zone, the alarm sounds. The audio alarm continues until the tar-
get leaves the guard zone or the guard alarm is deactivated. To deactivate the guard
zone, deselect [Alarm] at step 2.
You can mute the audio alarm by selecting [Off] in the [Alarm] - [Alarm Sound] menu
of the main menu (paragraph 2.10.6).
6.12.3

How to hide the guard zone

1. Select [Guard Zone] from the RotoKey menu.
2. Deselect [Visible]. The guard zone disappears from the screen.
Note: This operation is available when the guard zone is deactivated.
6.12.4

Guard zone menus

There are four sub menus in [Guard Zone]; [Visible], [Alarm], [Auto Acquire] (see
paragraph 6.24.3) and [Resize]. When the guard zone is visible, you can select these
sub menus from both the RotoKey menu and pop-up menu. To display the pop-up
menu, select anywhere on the lines of the guard zone.
6.13

Echo Trails

Echo trails show the movements of radar targets relative or true to your ship in imita-
tion afterglow. This function helps alert you to possible collision conditions.
6.13.1

How to show or hide echo trails

To show the echo trails, select [Echo Trail] from the RotoKey menu. To hide the echo
trails, deselect [Echo Trail].
6.13.2

How to clear echo trails to restart new echo trails

Select [Clear Trail] from the RotoKey menu to clear echo trails and restart with new
echo trails.
6.13.3

Echo trail time

You can set the trail time. Trails are shown on the screen until the end of the selected
trail time then the trails are erased and restarted.
1. Select [Menu] on the menu icon bar to open the main menu.
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