Remote controlled cars are easy, and RC tanks can even shoot their guns. One type of vehicle has eluded remote control hobbyists to a large extent; building a remote control submarine is hard.

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 ...

It's this engine-making Rolls-Royce company we're interested in now, as it just announced it is entering the submarine solution provider market with not one, but two different solutions.