The USS Manatee (AO-58) was a Cimarron-class fleet replenishment oiler constructed during World War II, featuring a Maritime Commission type (T3-S2-A3) tanker hull with a cargo capacity of 146,000 barrels. Laid down on August 28, 1943, by Bethlehem Sparrows Point Shipyard in Maryland, and launched on February 18, 1944, she was commissioned on April 6, 1944. The vessel was designed to support fleet operations by transporting and delivering vital fuel supplies. Physically, the Manatee was a large, liquid-carrying vessel capable of steaming extensive distances, with notable service distances exceeding 65,000 nautical miles in her first year alone. Her primary role was to replenish Allied naval forces across the Pacific theater, supporting major campaigns such as the invasions of Saipan, Tinian, Guam, and later the Battle of Okinawa. During her wartime service, the Manatee played an essential logistical role, fueling carrier groups, amphibious forces, and supporting fleet operations across the Pacific, including the Philippines, Palau, and Ulithi atolls. Her logistical efforts contributed significantly to the operational readiness of the Pacific fleet, discharging over 1.3 million barrels of black oil, nearly 40,000 barrels of diesel oil, and over 3.2 million gallons of gasoline during her first year at sea. After World War II, she continued service in the Pacific, supporting occupation efforts and later engaging in voyages between oil ports in the Persian Gulf, Japan, and the United States. She was reconfigured for different roles, including service as a Military Sea Transportation Service (MSTS) vessel, before returning to fleet support during the Korean War, where she made multiple deployments supporting United Nations operations off Korea. Her service extended into the Vietnam era, participating in operations in the South China Sea. Notably, on August 20, 1971, a valve left open caused a spill of approximately 230,000 gallons of heavy fuel oil off the California coast, resulting in environmental damage and leading to the relief of her commanding officer. The USS Manatee was decommissioned in July 1973 and struck from the Naval Vessel Register in August of that year, ultimately being sold for scrapping in December 1973. Her extensive service history underscores her vital role in naval logistics and fleet support over nearly three decades.

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