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The U.S. Navy submarine Triton (pictured) completed the first submerged circumnavigation of the world.

Historical image related to The U.S. Navy submarine Triton (pictured) completed the first submerged circumnavigation of the world. from April 25, 1960

United States Navy

Maritime service branch of the U.S. military

The United States Navy (USN) is the maritime service branch of the United States Department of Defense. It is the world's most powerful navy with the largest displacement, at 4.5 million tons in 2021. It has the world's largest aircraft carrier fleet, with eleven in service, one…
Source: Wikipedia (CC BY-SA)

USS Triton (SSRN-586)

US Navy radar picket submarine

USS Triton (SSRN/SSN-586), the only member of her class, was a nuclear powered radar picket submarine in the United States Navy. She was the only Western submarine powered by two nuclear reactors. Triton was the second submarine and the fourth vessel of the United States Navy to…
Source: Wikipedia (CC BY-SA)

Operation Sandblast

1960 US Navy and world's first submerged circumnavigation

Operation Sandblast was the code name for the first submarine circumnavigation of the world. It was executed by the United States Navy nuclear-powered radar picket submarine USS Triton (SSRN-586) in 1960 under the command of Captain Edward L. Beach Jr.
Source: Wikipedia (CC BY-SA)