Navy Underwater Demolitions Teams “UDT” Fins – Circa post WWII throughout the 50’s-early 60’s During the inception of the U.S. Naval underwater warfare units, Strong swimmer, Frogmen, OSS-UDT and finally SEALs teams, the earliest days utilized Churchill style fins but shortly after WWII the Navy began looking for a more military grade “hardier-use” fin to stand up to the rigors of
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