USS Viper, lead "boat" of a class of three 145-ton submarines, was built at Quincy, Massachusetts. Commissioned in October 1907, she operated along the U.S. East Coast for the next two years, and in 1910 became part of the Atlantic Fleet's Reserve Torpedo Group based at Charleston, South Carolina. Viper was renamed B-1 in November 1911 as part of a general renaming of the Navy's submarines. In early 1915 she was transported to the Far East on board the collier Hector, recommissioning for Asiatic Fleet service in April of that year. The rest of her career was spent in Philippine waters. B-1 received the hull number SS-10 in July 1920 and was decommissioned at the beginning of December 1921. Subsequently employed as a target, she was stricken from the list of U.S. Navy vessels in mid-January 1922.