Keokuk Class Mine Layer; Laid down, 1914 as SS Henry M. Flagler at William Cramp & Sons, Philadelphia, PA.; Renamed Columbia Heights, 1940; Acquired by the Navy, 28 July 1941 classified as a Net Layer AN-5 and named Keokuk; Commissioned, USS Keokuk (AN-5), 28 February 1942; Reclassified Mine Layer CM-8, 18 May 1942; Reclassified, Net Cargo Ship AKN-4, November 1943; Decommissioned; 5 December 1945 at San Francisco, CA.; Struck from the Naval Register, (date unknown); Transferred to the War Shipping Administration, 1 July 1946 for disposal; Sold into merchantile service, 7 March 1947 to the West India Fruit & Steam Ship Co. Fate unknown. Keokuk received five battle stars for World War II service.
Specifications: Displacement 6,150 t.; Length 353' 6"; Beam 57'; Draft 17'; Speed 12kts.; Complement 278; Armament two 3"/50s, two twin 20 mm, four .50 cal. machine guns, and two .30 cal. machine guns; Propulsion Cramp Type vt 3 boilers, 2,700 shp, two shafts.