Why my navigation app does not use my AIS transponder’s GPS position from PilotLink2?

Most Class A transponders are only mandated to output VDM and VDO sentences. The VDO sentence includes your ship’s “own” position, as reported by the AIS unit’s GPS and this can be used by ECDIS and ECS systems to validate the position received from the ship’s main GNSS positioning system. Unfortunately, the Navionics App only...