GPS reception may be unavailable or unreliable over a large portion of the southeastern states and the Caribbean during offshore military exercises scheduled between January 16 and 24.
The FAA has posted a flight advisory for the exercises that will require jamming of GPS signals for periods of several hours each day of the event. Navigation guidance, ADS-B, and other services associated with GPS could be affected for up to 400 nautical miles at Flight Level 400, down to a radius of 180 nm at 50 feet above the ground.
The flight advisory encourages pilots to report any GPS anomalies they encounter. Reports may be submitted using this online form.
Similar exercises have generated hundreds of reports of interference to aircraft during, and concerns have been raised about the safety impact of testing.
The upcoming dates for the exercise will be as follows:
- Saturday, Jan. 18, 2020 from 12 p.m. to 7 p.m.
- Thursday, Jan. 23 from 7 a.m. to 7 p.m.
- Friday, Jan. 24 from 6:30 a.m. to 7 p.m.