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."
Scale [ca. 1:3,231,360. 1 in. to approx. 51 miles] (W 125°00--W 103°30/N 42°00--N 31°45) ; 1 map : hand col. ; 40 x 60 cm., on sheet 46 x 68 cm ; Relief indicated by hachures and spot heights ; Prime meridians: Greenwich and Washington, D.C ; Decorative border ; Hand colored ; Atlas p. numbers in upper margin: 58-59 ; Date est. from territorial borders and county configuration ; Shows natural features, locations of Indian tribes, proposed railroad routes, routes of explorers, trails, county boundaries and populated places ; Johnson and Ward