It’s a bird, it’s a plane, it’s Super Sub! U-Boat Worx’s just-launched, ruby-red flagship may have more in common with the original 1950s Superman than the color of his cape. The Dutch submersible ...

Admittedly, though, when it comes to the ultimate superyacht toy, the mini-sub’s appeal is tough to beat. People have been fascinated by what lies below the surface of the ocean for millennia.

The design has the lithium batteries and thrusters at the rear so the pilot and passengers can enjoy the view. U-Boat Worx The three-person submersible has a “droplet-shaped hull,” according to U-Boat ...