From the Howard Cannon Photograph Collection (PH-00192). Stamped on verso: "John J Nulty Photographer 230 Tahoe Drive Carson City, Nevada Tel. GR. 2-2603"
Description given with photo: "Radar Installed on Passenger Planes Culver City, Calif. -- Radar safety control system (cabinet, left, center) for passenger planes, demonstrated by Howard Hughes in a trans-world airline plane, at Culver City, May 1st. Radar, with 500 and 2,000 foot warning signals, tells the pilot when he is approaching obstacles. Equipment is being installed in planes flying routes from San Francisco eastward to Shanghai. Credit (ACME) 5/3/47."