4. NAV / NAS / Patuxent River

38°16'48"N 76°25'14"W NAS Patuxent River http://www.cnic.navy.mil/regions/ndw/installations/nas_patuxent_river.html
Established 1942 and built up through the years to USN main aircraft testing & evaluating facility. Current units:
- Hq Naval Air Systems Command
- Commander Fleet Readiness Centers http://www.navair.navy.mil/comfrc/
- Naval Air Warfare Center Aircraft Division with Air Test and Evaluation Sq (VX) 1, Scientific Development Sq (VXS) 1
- Naval Test WIng Atlantic with Air Test and Evaluation Sq (VX) 20, 21 and 23
- Unmanned Aerial Systems Test Directorate
- US Naval Test Pilot School.

- USMC Aviation Detachment Patuxent River

- Navy Munitions Command Atlantic Detachment Patuxent River

- Naval Supply Systems Cmd Fleet Logistics Center Detachment Patuxent River

- 5th Coast Guard District

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