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4. AIS OPERATION
4-4
Note 1: The equipment continues to process AIS targets when the AIS feature is
switched off. When the AIS is again turned on, symbols are immediately displayed.
Note 2: AIS symbols are momentarily erased after the screen is redrawn when the
heading is changed from the head-up mode.
Note 3: When no AIS data is received, the Alert 380 "AIS Receive Error" appears in
the [Alert] box. Check the AIS transponder.
Note 4: An AIS target is declared a lost target if it is not detected in five consecutive
reporting periods.
4.4 How to Filter AIS Targets
If the screen becomes cluttered with AIS targets, you can filter out unnecessary AIS
targets, from the [DISP FILTER] menu.
1. Right-click the AIS mode indication then click [AIS Menu] to show that menu.
2. Open the [5 DISP FILTER] menu.
3. At [1] - [3], disable or enable tracking of respective item as appropriate.
4. Select [4 MAX RANGE] and set the maximum range to display an AIS target. An
AIS target not within the range set here is not displayed.
5. Set the minimum ship speed for AIS targets, with [5 MIN SHIP SPEED]. Any AIS
target whose speed is slower than that set here will not be displayed.
6. Close the menu.