Normally the members of frogman club join Frogman Course. He became a Underwater Demolition Team (UDT) Frogman in 1951, serving on two UDT Teams. Italy started World War II with a commando frogman force already trained. The term "frogman" is occasionally used to refer to a civilian scuba diver. It stars Lloyd Bridges as former United States Navy frogman, Mike Nelson. Opening acts were the Bill Black Combo, The Exciters, Clarence "Frogman" Henry, and Jackie DeShannon. Stewart's version incorporated a vocal refrain from "Ain't Got No Home" by Clarence "Frogman" Henry. Elliott arranged for Crabb, an experienced ex-naval frogman, to investigate. For the maritime reconnaissance, Headley received assistance from a frogman in the Pakistan Navy. These operations were part of a longer series of frogman operations; see human torpedo. The Soviet Union started frogman operations during World War II. The first frogman from aircraft carrier arrived 43 minutes after splashdown. The body of one North Korean frogman was found. It represents the fifth generation of the Frogman series. He accepted and returned to duty as a frogman.