The USS Bonita (SS-165), originally designated V-3 (SF-6), was a Barracuda-class submarine built for the United States Navy, with her keel laid at the Portsmouth Navy Yard. Launched on June 9, 1925, and commissioned on May 22, 1926, under the command of Lt. Cmdr. Charles A. Lockwood Jr., she was designed to achieve a surface speed of 21 knots, matching the fleet's requirements for operating alongside battleships. Her initial propulsion system comprised two Busch-Sulzer direct-drive 6-cylinder 2-cycle diesel engines, each producing 2,250 horsepower, complemented by auxiliary Busch-Sulzer diesels of 1,000 horsepower each, which primarily charged batteries and provided auxiliary power. In 1940, Bonita underwent modifications, replacing her auxiliary diesels with MAN-designed 6-cylinder 4-cycle diesel engines, enhancing her operational capabilities. However, in 1942-43, she was converted into a cargo submarine, during which her main engines were removed to expand cargo space. This conversion significantly diminished her speed, relying on auxiliary diesels for propulsion, which proved ineffective for practical cargo transport. Throughout her service, Bonita cruised along the East Coast, Caribbean, and Pacific waters, including Hawaii and the West Coast. She was part of Submarine Divisions 12, 15, and 20, and participated in routine patrols and training missions. Notably, in 1931, her armament was updated from a 5-inch/51 caliber deck gun to a 3-inch/50 caliber weapon. She was decommissioned briefly in 1937 but was recommissioned in 1940 during World War II, serving mainly in patrol and training roles off Panama and the Maine coast. Her conversion to a cargo submarine was an attempt to bolster unconventional operational roles, including support for guerilla operations in the Philippines, though this effort was ultimately deemed ineffective. Bonita was decommissioned on March 3, 1945, after serving through World War II, and was sold later that year. Her career reflects the evolving strategies and technological challenges faced by early 20th-century submarines in the U.S. Navy.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.