American UH-34D Choctaw - The Sikorsky H-34 Choctaw was a helicopter originally designed for the US Navy for service in the anti-submarine warfare (ASW) role. It was developed from the Sikorsky UH-19 Chickasaw. Powered by a single Wright R-1820-84 radial engine, it could carry 12 to 16 troops or eight stretcher cases if utilized in a MedEvac role. It is a utility transport helicopter, with no armament on board. The aircraft first flew on March 8, 1954. It was initially designated HSS Seabat by the Navy and HUS Seahorse by the US Marines and US Coast Guard.
In 1962, all services adopted the US Army designation. The H-34 Choctaw, under the new unified system, the Seabat was redetermined the SH-34