HMS Ocelot is a British submarine that was launched in 1960 and served in the Royal Navy until 1991. It is a part of the Ocelot-class submarines, designed for anti-submarine warfare and reconnaissance missions. The submarine is notable for its diesel-electric propulsion system, which allows it to operate quietly underwater. Today, HMS Ocelot is preserved as a museum ship at the Royal Navy Submarine Museum in Gosport, England. Visitors can explore its interior and learn about life aboard a submarine during the Cold War era. The vessel provides insight into naval history and submarine technology.