Editing Fort Blockhouse (section)

====SETT training facility (1998-2020)====
[[File:Submarine Escape Training, Gosport. MOD 45143837.jpg|thumb|right|The SETT viewed from above (2004).]]
The Royal Navy Submarine School (RNSMS) remained at Fort Blockhouse until 23 December 1999, whereupon it moved to [[HMS Raleigh (shore establishment)|HMS ''Raleigh'']] in Cornwall. Nevertheless, the RNSMS still continued to make use of the Submarine Escape Training Tank (SETT) at Fort Blockhouse for a further twenty years:<ref name="auto">{{Cite web|url=https://www.portsmouth.co.uk/news/defence/iconic-gosport-tower-used-submariners-final-time-1359757|title=Iconic Gosport tower is used by submariners for the final time|website=www.portsmouth.co.uk}}</ref> the SETT was used for pressurised training up until 2012, and then continued to be used for non-pressurised drills and teaching until it was finally decommissioned in January 2020.<ref>{{cite news |title=End of era for Gosport's iconic submarine escape tower |url=https://www.royalnavy.mod.uk/news/2020/january/09/200109-end-of-gosport-escape-tower |access-date=11 September 2024 |work=Royal Navy News |publisher=Royal Navy |date=9 January 2020}}</ref> 

Subsequently a new submarine training facility was opened in [[HMNB Clyde]].<ref>{{cite news |title=HRH Prince William opens £34m submarine training facility in Clyde |url=https://www.royalnavy.mod.uk/news/2021/june/29/210629-new-submarine-training-facility |access-date=11 September 2024 |work=Royal Navy News |publisher=Royal Navy |date=29 June 2021}}</ref>