The FAA has issued a flight advisory for potentially unreliable GPS signals in the vicinity of Patuxent River, Md., between May 30 and July 8.
During testing GPS signals may be unreliable or unavailable within a 15-nautical-mile radius centered at 81542N/0762602W or the PXT VOR 225.3-degree radial at 2.2 nm at and below Flight Level 400.
Pilots are encouraged to report anomalies to the appropriate air route traffic control center to help determine the extent of signal degradation. Please share your reports with AOPA.
Notams will be published at least 24 hours in advance of tests, but may change with little or no notice. Pilots are encouraged to check notams frequently for changes to operations in the area. Tests will be during any period within the stated times, the FAA said.
The testing schedule is set for 1300Z to 2200Z daily from May 30 to June 3, June 6 to 10, June 13 to 17, June 20 to 24, June 27 to July 1, and from July 5 to 8.