HMS Trafalgar was the first British submarine to travel around the globe and is the fifth Royal Navy vessel to bear the name.
The Devonport-based Trafalgar is the lead ship of seven Trafalgar Class nuclear-powered hunter-killer submarines. It will become the ninth decommissioned submarine to be stored in Plymouth.
The 85.4m-long and 9.8m-wide submarine has a dived displacement of 5,200t and can accommodate a crew of up to 130. Trafalgar sails at a maximum submerged speed of 32kt.
The submarine was launched in July 1981 after being built at the Barrow-in-Furness yard of Vickers Shipbuilding and Engineering.