Although the Nemo personal submarine is billed as "the lightest manned submersible ever built," it's still typically hefted into the water via a crane on a superyacht. The Beachlauncher offers an ...

The Super Sub can achieve a top speed of 10 knots (11.5 mph). This is considerably faster than the average personal submersible, which typically operates at speeds around 3 knots. For comparison, this ...