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18. TT AND AIS DISPLAYS
18-5
18.1.5 How to set the TT lost target alarm filter
If you are in a congested area the lost target alarm may sound against many AIS tar-
gets. In this case, you can prevent the alarm from sounding against TT that are be-
yond a certain range and/or smaller than a specific length.
1. Open the MENU and select [TT/AIS] and [Setting] then click the [Setting.2] tab.
2. In the [TT Lost Target Filter] window, set the maximum range to track a target and
the minimum ship speed to track.
Max Range: The maximum range at which to track a lost target. A tracked target
not within this range is not tracked.
Min Ship Speed: A tracked target whose speed is slower than set here does not
trigger the lost target alarm.
3. Click the [ON/OFF] button to show ON or OFF as appropriate.
18.1.6 TT recording functions
Tracked target information is saved to the [Danger Targets] log. See section 18.5.