Submersibles work on undersea oilwells, recover practice torpedoes, search for sunken ships or things that have fallen off ships and sunk.
YES, most true submersibles have a 'pilot' and a systems operator. The submersibles that do not carry people are usually called ROV's or AUV's
Very small, if it even exists. Most submersibles do not carry cargo
Deep sea submersibles help get research from the ocean floor.
Well, around 300. Some are out of order, and only a few can still work.
alvin
july 21, 1856
John Wilkes Booth did
no
They come in different shapes and sizes
Submersibles are commonly used by researchers and security forces such as the navy and the coast guard. The coast guard can use them to inspect the underside of ships for any smuggled items.
One of the major advantage of personal submersibles over scuba gear is you can't feel the changing pressure while ascending and descending.
Narrowboats are one example.Nissan is a car maker.Nuclear submarines are military submersibles.