The USS San Diego (AFS-6) was a Mars-class combat stores ship acquired by the U.S. Navy in 1968 and commissioned in 1969. Constructed by the National Steel and Shipbuilding Company in San Diego, California, she was launched on 13 April 1968 and entered service on 24 May 1969. The ship was designed to serve as a vital logistical support vessel, primarily providing underway replenishment of supplies to U.S. Navy fleet units. The vessel measured approximately 518 feet in length, with a beam of about 73 feet and a displacement around 20,600 tons when fully loaded. Her design enabled her to operate in high-demand environments, supporting aircraft carriers, amphibious groups, and other naval task forces across the Atlantic and Mediterranean theaters. She was equipped to carry a variety of supplies, including dry stores, refrigerated goods, and spare parts, and was capable of vertical replenishment using her embarked helicopters. Throughout her service, USS San Diego conducted multiple deployments to the Mediterranean with the Sixth Fleet, often visiting ports such as Lisbon, Corfu, Athens, Palma de Mallorca, Naples, and Tunis. She supported major fleet operations, including servicing aircraft carriers like USS Franklin D. Roosevelt, USS John F. Kennedy, and USS Nimitz, as well as amphibious task groups. Notably, she earned the Supply Efficiency "E" during one of her Mediterranean tours and participated in rescue operations, such as saving sailors from a burning Greek freighter. In 1989, San Diego was involved in a minor collision with the submarine USS Norfolk in the Thimble Shoal channel, sustaining minor damage with no injuries. She continued active service until her decommissioning on 11 August 1993, after which she was transferred to the Military Sealift Command as USNS San Diego (T-AFS-6), serving with a civilian crew until 1997. The vessel was ultimately laid up in Philadelphia and sold for scrapping in 2006, marking the end of her nearly three decades of logistical support to the U.S. Navy.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.