The third USS Mohican (SP-117), later USS SP-117, was an armed yacht that served in the United States Navy as a patrol vessel from 1917 to 1919. Mohican was designed by St Clare John Byrne, built as the civilian steam yacht SS Norseman and launched in 1890 by Laird Brothers in Birkenhead, Wirral, for Engineer Samuel Radcliffe Platt. When sold by Platt, she was renamed SS Lady Godiva and later when purchased by New Yorker Tracy Dows he named her Mohican. Oliver and J. Borden Harriman purchased her from Tracy Dows in October 1905. The U.S. Navy acquired Mohican on a free lease from her next owner, Robert Perkins of New York City, on 19 April 1917 for use as a patrol boat during World War I. She was commissioned at New York City on 7 June 1917 as USS Mohican (SP-117) with Lieutenant Peter P.