The Argonaut was a class of submarines built by engineer Simon Lake. When used without clarification generally refers to the second built and larger one launched in 1900 at Baltimore. She was 36-foot (11 m) long, cigar shaped and built of steel. She had a gas engine and propeller, dynamo, searchlight, and pumps for air and water. Her main attribute like that of the older sibling and predecessor Argonaut Junior (1894); was a wet diving chamber that allowed a diver to leave and re-enter the submarine. The "Argonaut No 1", and "Argonaut No 2" are used as the name of this vessel.
"Argonaut No 1" was built in 1897 and is 36 feet (11 m) in length. In September 1898 it made an open-ocean passage from Norfolk, Virginia, to Sandy Hook, New Jersey, becoming the first submarine to operate successfully in the open sea.  
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