including mini submarines, exploration vehicles, and working boats, it said. Although at times it's described in the company marketing materials as a "private submersible superyacht" the M5 would ...

And 82 years ago this month, it was a star attraction in Inland Empire cities. The 81-foot-long mini-submarine, hauled around the nation on a flat-bed truck, drew huge crowds in Pomona ...

But Russian media reported the ship was a top-secret nuclear-powered mini-submarine. Putin's spokesman Dmitry Peskov explained the secrecy surrounding the tragedy by saying the information was a ...

We often think of submarines as fairly complex pieces of machinery, and for good reason. Keeping the electronics watertight can naturally be quite difficult, and maintaining neutral buoyancy while ...