I'm not sure of its name, but what I do know is that this ship, moored outside of the Table Bay hotel at the V&A Waterfront, belongs to the British Navy. I couldn't see a name on her side, nor were those entering the access-control area willing to speak of her. Perhaps they're on a super-secret mission!
For some reason ships have such beautiful lines in photos - which I'd argue is why in English we refer to them in the feminine. ;)