The Future is Unmanned

As far as submarines go... The evolution of future submarines for military use will be driven by the trend to use smaller, autonomous, and unmanned vehicles to perform missions both under and above the sea.

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Personal Subs
According to U.S. Submarines, "the Phoenix 1000 is a 65-meter (213') personal luxury submarine. The initial design was originally executed for a client and now awaits a buyer (if anyone buys this can I go for a test drive?). As proposed, the submarine would constitute the single largest private undersea vehicle ever built, and arguably, one of the most significant personal transportation devices of the century."

Any private sub owners out there? You might want to check out the Personal Submersibles website for private submarine owners. They also have a Open Source Submersible Project a collaborative effort to design a submersible. Photo: U.S. Navy