Proximity Alarm; Lost Target - Furuno 1835 Operator's Manual

4.13

Proximity Alarm

The proximity alarm alerts you when an AIS target is within the range you set. The au-
dio alarm sounds and the alarm message "PROXIMITY" appears. The target symbol
changes to a dangerous target symbol (red) and flashes with its vector. Press any key
to stop the audio alarm and flashing. The dangerous target symbol is displayed until
the target is not within the range set, the alarm range is changed to exclude the target,
or the proximity alarm is deactivated.
1. Press the MENU key to open the menu.
2. Use the Cursorpad ( or ) to select [Target] and press the ENTER key.
3. Use the Cursorpad ( or ) to select [Proximity] and press the ENTER key.
4. Use the Cursorpad ( or ) to select the range and press the ENTER key.
5. Press the MENU key to close the menu.
4.14

Lost Target

When AIS data is not received from a target at fixed interval (3-5* report intervals), the
target symbol changes to the lost target symbol (flashing). No audio or visual alarm is
given for a lost target.
* The interval at which AIS data is sent depends on speed of the AIS transponder. For
detailed information, refer to the Operator's Manual for the AIS transponder.
You can remove all lost AIS targets from the display as follows:
1. Press the MENU key to open the menu.
2. Use the Cursorpad ( or ) to select [AIS] and press the ENTER key.
3. Use the Cursorpad ( or ) to select [ACK Lost Targets] and press the ENTER
key.
Proximity options
Lost target symbol
ACK Lost Targets options
4. AIS OPERATION
4-9