Civilian S-43 amphibian was smaller version of 4-engine S-42 flying boat used by Pan American to make survey flights across the Pacific. Pan American Airways used S-43 over its Caribbean and South American routes. Also operated by other airlines in Norway, West Africa, Russia, China, and in Hawaiian and Philippine Islands. 14 Apr 36, Boris Sergievsky, Chief Test Pilot for Sikorsky Aircraft, piloted S-43 to altitude record for Class C3 amphibians of 27,950 ft. Also made world's first single-engine takeoff in multi-engine amphibian becoming airborne after losing fuel pressure in right engine during takeoff run. 15 JRS-1 used primarily by Navy as utility transport; some also assigned to Army and Marines. NASM's aircraft was 13th production model. Initially assigned to NAS San Diego, was reassigned to Pearl Harbor June 1940 and was 1 of 10 JRS-1 aircraft which all survived attack on 7 Dec 41. Museum's aircraft was first to be launched after attack to hunt for Japanese fleet with bombs and depth charges fitted to wings.