The GPS Jamming-Spoofing Report is intended to be used to transmit an alert if the ship systems sense a GPS jamming (loss of GPS) or GPS spoofing (incorrect position) event. When this happens, the last known good position and time will be transmitted in this message. When the event is over the same message can be sent with the complete bit set, with the time and position that GPS was regained. This message has been reduced in size to less than a single slot to provide increased probability of detection via satellite.
All directions are relative to True North, all positions are WGS-84 Datum.
Dr. Gregory Johnson