JMA-9172-SA Instruction Manual > 5.OPERATION OF TARGET TRACKING AND AIS > 5.3  AIS OPERATION
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5.3 AIS OPERATION
5.3.1 Restrictions
The following restrictions are placed on use of the AIS function.
The AIS function is unavailable in the following cases:
•    or   is selected for the speed sensor.
• The current offset (Set/Drift Setting) is set while   or   is selected 
for the speed sensor.
• The GPS geodetic system is used except WGS-84.
 or   cannot be selected for the speed sensor in the following case:
• The AIS function is turned on and the current offset (Set/Drift Setting) is 
selected.
 cannot be selected for the speed sensor in the following case:
• The AIS function is On.
Current offset (Set/Drift Setting) cannot be turned On in the following case:
•  or   is selected for the speed sensor while the AIS function is on.
5.3.2 Setting AIS Display Function (AIS Function)
        
1) Press the [AIS/TT] key. Alternatively, left-click the   button 
in the Target Information located at the upper right of the display.
The received AIS information will be shown on the radar display. 
• When the AIS function is set to Off, the AIS display 
function is turned off and AIS symbols are no longer 
displayed.
• Once the AIS display function is set to Off, it is not 
automatically switched to On even if a dangerous 
target exists.