An unusual feature is the periscope from the submarine HMS Excalibur.
She is the only ship to be named as such, and was named in honour of the sword of King Arthur of the Arthurian legend.
HMS Beagle | Excalibur | HMS Victory | HMS M31 | HMS Bounty | HMS M23 | HMS ''Humber'' | HMS ''Bounty'' | HMS M27 | HMS M25 | HMS Investigator | HMS M33 | HMS ''Beagle'' | HMS Plumper (1848) | HMS Endeavour | HMS ''Victory'' | HMS Royal Charles | HMS Queen Mary | HMS ''Plumper'' | HMS Britannia | HMS ''Investigator'' | HMS ''Express'' | HMS Duke of Wellington | HMS ''Britannia'' | HMS Ark Royal | Yangtse Incident: The Story of HMS Amethyst | HMS ''Winchelsea'' | HMS Volage | HMS ''Trincomalee'' | HMS Trincomalee |