GNSS Jamming

GNSS jamming is the deliberate radio interference that overpowers weak satellite navigation signals (GPS, Galileo, GLONASS, BeiDou), denying a receiver a position fix. It is widespread around conflict zones and contested straits, degrading ECDIS positioning, AIS accuracy, and timing references on the bridge. Unlike spoofing, jamming denies rather than deceives; mitigation relies on multi-constellation, multi-frequency receivers and inertial aiding to hold a track through the outage.