The USS Maumee (AO-2) was a significant fuel ship in the United States Navy, notable for being the first surface vessel powered by diesel engines in the U.S. Navy. Laid down on July 23, 1914, at the Mare Island Navy Yard and launched on April 17, 1915, she was commissioned on October 20, 1916. Originally designated Fuel Ship No. 14, she was later classified as AO-2 following the introduction of Navy ship classifications in 1920. The ship's propulsion system was groundbreaking, featuring two 3,600 horsepower diesel engines, which Lt. Chester W. Nimitz supervised during their installation—making her a pioneering vessel in mobile naval logistics. Maumee's early service saw her operating off the east coast of the United States and Cuba before the U.S. entered World War I. Following the declaration of war in April 1917, she played a vital role in refueling destroyers at sea during transit to Britain, operating approximately 300 miles south of Greenland. Her most notable contribution was pioneering underway refueling operations, which allowed U.S. naval forces to sustain extended operations at sea, a tactic that proved crucial during World War II. By mid-1919, she had refueled 34 destroyers bound for Ireland and participated in Atlantic crossings to support naval units attached to the American Expeditionary Force. After a period of reserve, Maumee was recommissioned in June 1942 during World War II, after an extensive overhaul that replaced her diesel engines with conventional steam propulsion. She served as a training vessel along the North Carolina coast before undertaking transatlantic operations, including refueling missions during the North African campaign and supporting the D-Day invasion by refueling tugboats. She also sank a German submarine with a single shot from her 5-inch gun. In 1945, Maumee was transferred to the Pacific Fleet, serving briefly off China before the end of the war. Postwar, she participated in lend-lease operations, supporting Chinese Nationalist forces before being transferred to the Republic of China in 1948, where she was renamed ROCS Omei (AO-309). Her service continued until her decommissioning and scrapping in 1967, marking a 30-year career that underscored her importance in naval logistics and fuel operations across two World Wars and beyond.

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