HMS Dolphin (shore establishment)

[1] The navy set about expanding the site by added new blocks and accommodation for various ranks, and the base became an independent command in August 1912.

[3] Heavy bombing during the Second World War on Gosport and Portsmouth, saw the submarine training school moved to Blyth in Northumberland as HMS Elfin.

[8] The Royal Navy Submarine School (RNSMS) remained at Dolphin until 23 December 1999 when it closed prior to relocation to HMS Raleigh at Torpoint in Cornwall.

The RNSMS staff marched into HMS Raleigh and were welcomed on board by Commodore Lockwood on 31 January 2000.

The RNSMS is located in the Dolphin and Astute blocks at Raleigh, although the Submarine Escape Training Tank (SETT), a 30-metre (98 ft) deep tank of water used to instruct all RN submariners in pressurised escape, remained active at the same site, now renamed Fort Blockhouse, until early 2020, when it was replaced with a newer training facility at HM Naval Base Clyde.