Description given with photo: "Hughes Pilots Radar-Equipped Plane Culver City, Calif. -- First passenger plane equipped with radar is flown in demonstration May 1st by Howard Hughes (left) and co-pilot R.C. Loomis over Culver City. Pilots using this equipment will be warned of approaching obstacles by lights flashing on radar panel. Two lights (lefts) with 2,000-foot range, are used to guarantee clearance over mountains; two lights (right) with 500-foot range, are a safety device for approaches and landings. Either set of lights warns against approaching aircraft. Trans-World Airline plans to install radar on its passenger planes. Credit (ACME) 5-3-47."

First test flight of the XF-11 at the Hughes Airport in Culver City, California in 1946.

Howard Hughes (left) and Clifford Adams at microphone of Station WINS in New York City.

A section of Howard Hughes' "Spruce Goose" or "Flying Boat" being moved (with a police escort) from the Hughes Aircraft plant in Culver City, California to Terminal Island in the Los Angeles Harbor where the plane was assembled in June of 1946.

A section of Howard Hughes' "Spruce Goose" or "Flying Boat" being moved (with a police escort) from the Hughes Aircraft plant in Culver City, California to Terminal Island in the Los Angeles Harbor where the plane was assembled in June of 1946.

A view of Howard Hughes installing a radar safety system for passenger planes in Culver City, California.

A view of Howard Hughes installing a radar safety system for passenger planes in Culver City, California.