page_title: Oberon-class submarine
section_title: Chilean service
hierarchical_section_title: Oberon-class submarine / Service / Chilean service
caption_attribution_description: English: Chilean Navy Official Photo of Oberon class submarine "Hyatt"
context_page_description: The Oberon class was a ship class of 27 British-designed submarines operated by five different nations. They were designed as a direct follow-on from the Porpoise class: physical dimensions were the same, but stronger materials were used in hull construction, and updated equipment was fitted.
  The submarines were built between 1957 and 1978 by four shipyards: Cammell Laird, Chatham Dockyard, Scotts Shipbuilding and Engineering Company and Vickers-Armstrongs. Thirteen of the submarines were operated by the Royal Navy, six by the Royal Australian Navy, three by the Brazilian Navy, three by the Royal Canadian Navy/Canadian Forces Maritime Command, and two by the Chilean Navy.
  The Oberons operated during the height of the Cold War, with duties including surveillance, tracking of other ships and submarines, delivery and retrieval of special forces personnel, and serving as targets for anti-submarine training. Submarines of the class were in service until 2000. As of 2015, eight of the submarines are preserved intact as museum vessels, another three are partially preserved, and one is in private ownership and awaiting conversion for display.
context_section_description: The Chilean government required two Oberon-class submarines to be built by Scott's Shipbuilders Engineering Co., Ltd. The first  was built in 1971 and launched on 22 December 1972 and given the name O'Brien, arriving at Punta Arenas on 10 August 1976. The second submarine, built in 1972, launched on 26 September 1973, was given the name Hyatt. The submarine arrived at Punta Arenas on 10 February 1977. These two submarines were able to achieve a speed of 12 knots surfaced and 17 knots submerged. With a length of 90 meters and a displacement of 2,030 tons surfaced and 2,410 tons submerged, the submarines had a 6,000 bhp engine to power them. The submarines were fitted with eight 21-inch torpedo tubes. Both submarines remained in service until 31  December 2001 where they were replaced by Scòrpene-class submarines.
caption: Oberon-class submarine Hyatt, picture by the Chilean Navy
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