USS Ranger, later USS Rockport and USS Nantucket (PG-23/IX-18), was a gunboat of the United States Navy. A screw steamer with full-rig auxiliary sail, Ranger was destined for a very long 65-year career, serving first as a U.S. Navy gunboat from 1876 to 1920, and later as a training ship with the Massachusetts Maritime Academy from 1909 to 1941. Probably taken in the channel between Mare Island and Vallejo. [U.S.N. Cutter Ranger]