NASA AIS plots reversed

[andybussell]

I've had a NASA AIS since 2005 and it worked well for years, great bit of kit. Recently it has started to systematically plot vessels in the opposite quadrant of the screen compared with positions observed from the cockpit.

Any ideas anyone? The guy at NASA had never heard of this happening before.

 

[crossbones]

Check that you'r not using the stored position for the gps reference. If the centre reference is wrong then everything will look out of place.