HMS Oberon was the first of the Oberon-class submarine

Submarine

A submarine is a watercraft capable of independent operation below the surface of the water. It differs from a submersible, which has more limited underwater capability...

s. She was built by HM Dockyard, Chatham

Chatham Dockyard

Chatham Dockyard, located on the River Medway and of which two-thirds is in Gillingham and one third in Chatham, Kent, England, came into existence at the time when, following the Reformation, relations with the Catholic countries of Europe had worsened, leading to a requirement for additional...

 and was laid down on 28 November 1957. She was commissioned on 24 February 1961.

Oberon cost £2.43 million. She was the first of the class to have a deeper casing installed to house the equipment for initial training of SSN crews.

Oberon was paid off in 1986. She was sold in 1987 to the Seaforth Group to be refitted for resale to Egypt, but was broken up at Grimsby

Grimsby

Grimsby is a seaport on the Humber Estuary in Lincolnshire, England. It has been the administrative centre of the unitary authority area of North East Lincolnshire since 1996...

in 1991.