USS AFDM-3
USS "AFDM-3, (former YFD-6"), was the lead ship of the "AFDM-3"-class floating dry dock built in 1943 and operated by the United States Navy. Construction and career. "YFD-6" was built at the Chicago Bridge and Iron Shipyard, in Chicago, Illinois in January 1943. She was commissioned on 9 December 1943. From 24 to 26 June 1944, USS Larch (YN-16) was dry-docked inside "YFD-6". In late December 1944, USS Arikara (AT-98) voyaged to Trinidad where she took "YFD-6" in tow before continuing on to the Panama Canal. On 26 June 1945, "YFD-6" was prepared transiting the Panama Canal , circa 1945. "YFD-6"'s center section fully turned 90 degrees, floating on its side with the support of a thousand Navy pontoons installed atop the wing wall. This work, done by Navy SeaBees, was necessary to allow the drydock section to fit through the canal's locks. USS YT-355, USS Alarka (YTB-229) and USS Umpqua (ATA-209) guided and towed the dry dock through the canal. In AUgust 1946, the dry dock was re-designated as "AFDM-3". USS Gauger (YO-55) towed "AFDM-3" and steaming in company with USS Bluebird (ASR-19), USS Cahuilla (ATF-152) and USS Tawakoni (ATF-114), she reached Pearl Harbor  on 12 October 1946. In latter 1948, "AFDM-3" and USS AFDM-7 arrived at the Balboa yard to be prepared to transit the Panama Canal similarly to the USS AFDM-1. Throughout 1950, The US Navy done heavy workload on "AFDM-3", USS AFDM-7 and USS AFDM-9. In 1986, "AFDM-3", USS ARD-10 and USS ARD-16 were all laid up in Mobile, Alabama. In 1999, the dry dock was leased to the Bender Shipbuilding and Repair Company. The "AFDM-6" was struck from the Naval Register on 15 November 2000. On 1 April 2002, it was sold to the company in Mobile. In 2010, the  Bender Shipbuilding Company was declared bankrupt thus all systems were acquired by the Signal International. After 2018, the shipyard was sold to World Marine of Alabama.