GPS Interference Off California Offers Warning for Global Shipping

On January 29, 2026, a GPS spoofing/jamming event linked to a U.S. military test (PMSRCA 26-02) affected at least seven vessels approaching the Port of Long Beach, causing erratic AIS position data and temporary loss of navigation reliability over a 100-mile area. While all vessels entered port without incident, the event highlights significant navigational safety risks within the Los Angeles/Long Beach Traffic Separation Scheme and warns of a broader global threat to maritime GPS/GNSS systems.