The Naval Air Systems Command (or NAVAIR) is a United States Navy command headquartered in Patuxent River, MD with military and civilian personnel stationed at eight principal continental United States sites and one site overseas.

NAVAIR provides engineering, development, testing, evaluation, in-service support, and program management capabilities to deliver airborne weapons systems.

NAVAIR is the principal provider for the Naval Aviation Enterprise?, but contributes to every warfare enterprise in the interest of national security.

NAVAIR is working on jet biofuels procurement for Navy aircraft and are testing JP-5? from bio-based materials for use in aircraft such as the F/A-18 Super Hornet on board aircraft carriers.