USS SC-209
USS SC-209, prior to July 1920, known as USS Submarine Chaser No. 209 or USS S.C. 209, was an in commission in the United States Navy during 1918. She was the victim of the deadliest friendly fire incident involving the U.S. Navy during World War I. Construction and commissioning SC-209 was a wooden-hulled submarine chaser laid down by the Mathis Yacht Building Company at Camden, New Jersey, in 1917. She was commissioned in March 1918 as USS Submarine Chaser No. 209, abbreviated at the time as USS S.C. 209. Service history On 22 August 1918, the Patterson Group was created to perform patrol and antisubmarine warfare duties also the United States East Coast during World War I. It consisted of the destroyer , which served as its flagship, and 12 submarine chasers, including S.C. 209. During the predawn hours of 27 August 1918, S.C. 209 was part of a scouting line of 11 submarine chasers patrolling with Patterson in the Atlantic Ocean south of Long Island, New York, in search of Imperial German Navy submarines. The United States Army-chartered armed cargo ship SS Felix Taussig, with guns manned by U.S. Navy gunners, was passing through the area, nearing the end