HMS Excalibur
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HMS Excalibur was an Script error: No such module "WPSHIPS utilities"., the sister ship of Script error: No such module "WPSHIPS utilities"., the two submarines being the only high-test peroxide (HTP) powered submarines to be constructed for the Royal Navy. She is the only commissioned ship in the Royal Navy to be named as such, in honour of the sword of Arthurian legend. In 2025, the Royal Navy christened a non-commissioned uncrewed submarine of the same name into service for the purpose of testing unmanned underwater systems.[1]
Operation
Both Excalibur and Explorer were assigned to the 3rd Submarine Squadron although due to their experimental nature, they tended to operate independently, accompanied by their depot ship HMS Kingfisher and a fuel carrier, RFA Spabeck. They later acted as high-speed underwater targets for the Royal Navy's prototype nuclear-powered submarine Script error: No such module "WPSHIPS utilities"..
Periscope
The submarine's periscope survives. It was installed in the starter's hut at the Golf House Club, the golf club at Elie and Earlsferry, Scotland; players and visitors may use it to view the golf course.[2]
References
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Bibliography
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