Hopestill, an 83-ton motor yacht, was built in 1916 at City Island, New York. Acquired by the Navy in May 1917 and commissioned the following July as USS Hopestill (SP-191), she was employed as a Third Naval District harbor patrol craft and New York Naval Hospital medical transport boat during World War I and into 1919. Hopestill was sold to a private owner in September 1919.