A view of the first passenger plane equipped with radar that Howard Hughes is flying in Culver City, California.

Photograph of Grover Whalen, Howard Hughes, and Al Lodwick during a parade procession for the completion of Hughes' Round-the-World flight. Typed onto a piece of paper attached to the image: "Howard Hughes riding up Broadway - waving to throngs. 7/15/38."

The black and white view of Howard Hughes, surrounded by crowds, after landing his Lockheed 14 aircraft for the Around the World flight at Floyd Bennett Airfield in New York. Description printed on photograph's accompanying sheet of paper: "Howard Hughes at Floyd Bennett Field after his round the world flight, 7-14-38. (Press Association)"

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."

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

A view of Grover Whalen, Howard Hughes, and Al Lodwick riding in the back of an automobile during a parade procession.