The USS K-2 (SS-33), originally named Cachalot, was a K-class submarine constructed for the United States Navy, with her keel laid down on February 20, 1912, by the Fore River Shipbuilding Company in Quincy, Massachusetts. She was launched on October 4, 1913, and commissioned on January 31, 1914. The vessel measured approximately 153 feet 7 inches (46.8 meters) in length, with a beam of 16 feet 8 inches (5.1 meters) and a mean draft of 13 feet 1 inch (4.0 meters). Her displacement was 451 long tons (458 metric tons) on the surface and 527 long tons (535 metric tons) submerged. She was designed for a maximum diving depth of 200 feet (61 meters). Powered by two 475 brake-horsepower NELSECO diesel engines for surface propulsion and electric motors for submerged operation, K-2 could reach speeds of 14 knots on the surface and 10.5 knots underwater. Her range was approximately 3,150 nautical miles at 11 knots when surfaced, and she carried four 18-inch torpedo tubes in her bow, with four reloads for a total of eight torpedoes. The crew consisted of 2 officers and 26 enlisted men. K-2's service history included patrols off the Azores during World War I, becoming the first U.S. submarine to patrol in European waters during the conflict. She participated in training and operational exercises along the U.S. East Coast, notably operating from Key West, Pensacola, Newport, and New London. During her deployment in European waters, she operated from Ponta Delgada in the Azores, conducting patrols to protect Allied shipping and deny U-boat access to the Portuguese archipelago. After the war, K-2 continued training and reserve duties along the U.S. coast, undergoing multiple overhauls and reassignments. In 1917, she was selected for wartime duty in European waters, arriving in the Azores in October 1917, conducting patrols until the Armistice in November 1918. She remained active in peacetime operations until her decommissioning on March 9, 1923. Stricken from the Naval Vessel Register in 1930, she was sold for scrap in 1931. Throughout her service, USS K-2 played a significant role in early U.S. submarine operations and wartime patrols, contributing to the development of American submarine tactics and presence during World War I.

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