USS Arcadia (SP-856)
 The first USS Arcadia (SP-856) was a motorboat that may have seen brief service as a United States Navy patrol vessel in late 1918.Arcadia was built as a private wooden motorboat of the same name in 1915 by Frank S. Terry at Brooklyn New York. In 1917 the U.S. Navy chartered her from her owner for use as a section patrol boat during World War I and took delivery of her on 8 October 1918.