Following trials by the Royal Air Force of rocket-propelled, air-launched weapons for anti-submarine warfare during 1942, the United States Navy launched a high-priority project during the summer of 1943 for the development of an anti-submarine rocket of its own [REF].
The resulting rocket was a simple design with four tail fins for stabilization at the rear,[REF] powered by a rocket motor that had been under development by Caltech since 1943 [REF].