Curlew was purchased for $44,000 by the
U.S. Navy in 1861 during the
American Civil War for the South Atlantic Blockading Squadron. She was outfitted as a
gunboat with armament consisting of a 30-pounder rifled gun on the foredeck and six 32-pounder smoothbores on the main deck.
Curlew participated in the expedition to
Port Royal, South Carolina under the command of Acting Lieutenant P.G. Watmough. When her machinery proved to be inadequate she was towed to New York by the transport
Baltic arriving on 21 November 1861 to be returned to her owners before the sixty-day trial period expired.
Curlew was chartered by the Quartermaster's Department in October 1862 and voyaged as far as
New Orleans, Louisiana under Captain H.N. Parrish. In the panic over the commerce raider ,
Curlew was again chartered in June 1863 for use as a gunboat, this time by the Navy Department. She was returned in October of that year. ==Final voyage==