Communities surrounding the NAS Patuxent River airfield are advised that helicopter nighttime testing events are scheduled to take place Aug. 12 through Aug. 16, 2019 from 8 p.m. to 12:30 a.m.
As with all operations, NAS Patuxent River takes precautions to lessen the impact of testing activities on the community. For more information call the toll free Pax River Noise Hotline at 1-866-819-9028.

I guess TPS has a graduating class
Last fiscal quarter; can’t have money left over so they spend it on fuel, etc.
Besides, NAS Pax is an Air Test Center and rumor has it the Navy must be able to fly at night, so there is that.