Take charge of marine vessels on the high seas.
Operates airplane equipped with special radio, radar, and other electronic equipment to conduct in-flight testing of air navigational aids, air traffic controls, and communications equipment, and to evaluate sites of proposed equipment installation: Plans flight activities in accordance with test schedule. Plots flight pattern and files flight plan. Informs crewmembers of flight and test procedures. Coordinates flight activities with ground-support crews and air-traffic control. Operates aircraft over designated area at specified altitudes in all types of weather to determine receptivity and other characteristics of airport-control signal and navigation and communications equipment and systems, such as racon, tacan, scater, and atis. Prepares evaluation reports of each flight. Conducts periodic preflight checks of aircraft to ensure proper maintenance and safe operation.