High Quality Content by WIKIPEDIA articles! Laid down in 1914 as the SS Henry M. Flagler by William Cramp & Sons, Philadelphia, Pennsylvania, and renamed SS Columbia Heights in 1940, she was acquired by the U.S. Navy on 28 July 1941 for conversion to a Coastal Minelayer, CMc-6. Reclassified as a Net Layer, AN-5, and named USS Keokuk on 15 August 1941, she was commissioned on 28 February 1942. Reclassified as a Minelayer, CM-8, on 18 May 1942, and again as a Net Cargo Ship, AKN-4, in November 1943.