The USS Otus (AS-20) was a distinctive submarine tender serving the United States Navy from 1941 to 1946. Originally laid down under a U.S. Maritime Commission contract on June 3, 1940, by the Federal Shipbuilding and Drydock Company of Kearny, New Jersey, she was launched as the Fred Morris on November 2, 1940. Built to a length overall of approximately 417 feet 9 inches (127.3 meters), she featured a beam of 60 feet (18.3 meters) and a loaded draft of 27 feet 6 inches (8.4 meters). Her propulsion system was powered by a De Laval steam turbine driving a large bronze, variable-pitch, three-bladed propeller 17.5 feet (5.3 meters) in diameter, supplemented by two 250 kW De Laval steam turbine generators providing electrical power. Initially, Fred Morris was designed for service between U.S. Gulf ports and destinations in the United Kingdom and Mediterranean, with modifications made for river and canal navigation. She was intended to accommodate a crew of 43, including deck, engine, and steward departments, and featured amenities such as two staterooms akin to liner cabins. Acquired by the Navy on March 1, 1941, and commissioned as USS Otus (AS-20) on March 19, 1941, she was the only vessel in her class, named after the mythological son of Iphimedia and Poseidon. As a submarine tender assigned to the Asiatic Fleet, she was stationed in the Philippines and nearby regions during the early days of World War II. She sustained minor damage during the Japanese air raid on the Cavite Navy Yard in December 1941 and was subsequently ordered to leave the Philippines, arriving in Australia in late December 1941. Throughout early 1942, she operated across Australia, Java, and Ceylon, tending submarines and supporting Allied operations in the Pacific. In 1943, she underwent an extensive overhaul at Mare Island Naval Shipyard, after which she resumed service in the Pacific theater, including locations such as Fremantle, Hollandia, and Leyte Gulf. Her role expanded to include providing routine repairs and emergency services for ships of the Southwest Pacific Area. In June 1945, her classification was changed to ARG-20, reflecting her role as an internal combustion engine repair ship. She continued her service until her deactivation in 1946, after which she was decommissioned on August 20, 1946, and sold the following day. Final scrapping occurred in 1970, with her earning one battle star for her World War II service.

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