Maps
cannot be calibrated across the 180 degree longitude line. Maps
cannot be calibrated across the 180 degree longitude line.
If there are Map Features on the Map - After sending waypoints the GPS and then bringing them back a Waypoint will be created on top of the Map Feature. The work around is to delete them manually. The Registered only feature "Merge Waypoints" does fix the problem provide the Map Feature waypoint names start with "MF".