This is the real risk of GNSS spoofing.
AIS, ECDIS, and radar overlays can all align around a false reference.
There is no alarm for misplaced confidence.
Inertial Navigation Systems (INS) provide an independent position reference, allowing detection of compromised signals and maintaining continuity when GNSS cannot be trusted.
This is no longer about accuracy.
It is about credibility of position.
DeepDraft Analysis by a serving Master Mariner
Maritime navigation | GNSS interfere
