Santa Rosa Island Range Complex

The Santa Rosa Island Range Complex is a component of the Eglin AFB testing range, located 17.5 miles west-southwest of the main base, on Santa Rosa Island, sitting between the communities of Navarre and Okaloosa Island. == Overview == The complex is part of the Eglin AFB overwater range that provides 86,500 square miles of overwater airspace that is jointly used for a variety of test and evaluation activities and training exercises.

Source: Wikipedia — Santa Rosa Island Range Complex (CC BY-SA 4.0)