British Royal Navy's Astute. A thing of beauty that, like most things of beauty, is difficult to pay for. This sub very posh and quite brill indeed. “This is the best submarine in the world. It is virtually undetectable, has reinvented the periscope and sonar, and doubles as a floating GCHQ[.]… She could prowl . . . → Read More: Britain’s Unaffordable Defender of the Realm