USS Manatee (SP-51)
 The first USS Manatee (SP-51) was an armed motorboat that served as a United States Navy patrol vessel from 1917 until sometime shortly after World War I.Manatee was built in 1915 as a wooden-hulled gasoline-powered private motorboat of the same name by Brown Brothers Shipyard at Tottenville on Staten Island New York. The U.S. Navy acquired her for World War I service from her owner J. B.