The Underwater Demolition Team (UDT), or frogmen, were amphibious units created by the United States Navy during World War II with specialized missions. They were predecessors of the Navy's current SEAL teams.

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L51-03.07.01 Underwater Demolition Team (UDT) Two; L51-03.07.02 Members of UDT-21; USN 1139365 Underwater Demolition Team (UDT) trainees ; USN 1139460 Underwater Demolition Team (UDT) members waiting in the mud; USN 1140049 Underwater Demolition Team (UDT) recruits; USN 1140065 Underwater Demolition Team (UDT) recruits eating lunch in the mud

UDT-21, SEAL Team ONE, and SEAL Team TWO detachments were deployed aboard two submarines for contingency operations. UDT-21 and SEAL Team TWO operators embarked USS Chopper (SS-342) in Mayport, Florida.

UDT 21 was a mixture of all types of men who had seen all types of duty; men from the battlewagons, cruisers and destroyers of the fleet; men from the amphibious forces and its multitude of different craft; men from the armed guard of the merchant marine fleet of tankers and freighters; men who had fought in all corners of the globe and men who ...

In 1954, the teams were redesignated: UDTs 1, 3, and 5 became UDTs 11, 12 and 13; and UDTs 2 and 4 became UDTs 21 and 22. Shortly thereafter, UDT 13 was decommissioned, because of personnel shortage, and split between UDT 11 and UDT 12. UDT 22 was decommissioned in June 1956 for the same reason with the personnel being assigned to UDT 21.

UDT 21 was the first US military unit to deploy to Japan and accept the surrender of a Japanese unit in the home islands. UDT continued to operate through the Korean War and into the 1960s and the Vietnam War.

Find Underwater Demolition Team (UDT) 21 unit information, patches, operation history, veteran photos and more on TogetherWeServed.com. TWS is the largest online community of Veterans existing today and is a powerful Veteran locator. If you served in Underwater Demolition Team (UDT) 21, Join TWS for free to reconnect with service friends.

2011年12月28日 · UDT-1 and UDT-3 were homeported in Coronado, Calif., and organized under Amphibious Forces Pacific, and UDT-2 and UDT-4 were sent to ATB Little Creek, and organized under Amphibious Forces Atlantic. These commands, which became UDT-11, UDT-12, UDT-21, and UDT-22 after Korea, were converted to SEAL Teams in 1983 and still serve at …

2022年8月17日 · 最后，水下爆破队 (UDT) 可能是最典型的原始海豹突击队单位。 它们于 1943 年底成立，以应对在塔拉瓦登陆失败，登陆艇卡在不明珊瑚礁上，给海军陆战队造成重大损失。 结果，形成了UDT。 他们的主要任务是对登陆区进行侦察并摧毁任何障碍物，为海滩袭击做准备。 这些 UDT 单位由最初的侦察兵和袭击者、OSS 海事单位和 Seabees 的成员组成。 在游泳作业中，UDT操作员会穿着浅褐色的泳裤，为他们赢得了“裸体勇士”的绰号。 作为一项传统，今天在 …