USS Patrol No. 8 (SP-56)
 USS Patrol No. 8 (SP-56) often rendered as USS Patrol #8 was an armed motorboat that served in the United States Navy as a patrol vessel from 1917 to 1919.Patrol No. 8 was built as a private motorboat of the same name in 1916 by Murray and Tregurthe at Boston Massachusetts. The U.S. Navy leased Patrol No. 8 from her owner millionaire Harold Stirling Vanderbilt of New York City on 10 May 1917 and commissioned her for service in World War I as USS Patrol No. 8 (SP-56) on 11 May 1917.