Furuno GD-280, Руководство оператора

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12-16
12.13.2 Confirming lost target
When the system detects a lost target, tracking on the target is discontinued and the target
symbol becomes a flashing diamond ( ). The normal plotting symbol is restored to the target
when the target is manually acquired. If the target is not reacquired the flashing diamond will be
erased from the screen. To confirm a target as a lost target do the following:
1. Place the +cursor on target.
2. Press the [CANCEL] key.
12.13.3 Guard zone alarm
When a target comes in the guard zone, the buzzer sounds and the indication GUARD ZONE
appears. The intruding target is denoted by an inverted triangle mark. The mark disappears
when the target exits the zone. This function is only available with the GP/GD-380/680.
You can set the guard zone as follows:
1. Press the [MENU], [9], [3], [5] to display the ARP menu, and select Page 2.
2. Press
[↑]
or
[↓]
to select Guard Zone.
3. Press
[→]
to select Set.
4. Set the +cursor on one boundary of the guard ring and press the [ENT] key.
5. Set the +cursor on the other boundary and press the [ENT] key.
A
B
0.5 mile
6. Press the [MENU] key several times to close the menu.
Note 1: The range of the alarm is fixed at 0.5 nm. The bearing may be set as desired.
Note 2: The [CLR] key silences the audio alarm.
Note 3 : To disable the guard ring, select Off at step 3 in the above procedure.
12.13.4 Enabling/disabling the audio alarm
The default audio alarm status is "ON." If you do not require the audio alarm you may turn it off
as follows:
1. Press the [MENU], [9], [3], [5] to display the ARP menu, and select Page 1.
2. Press
[↓]
to select Audio Alarm.
3. Select On or Off as appropriate.
4. Press the [MENU] key several times to close the menu.