no
They can submerge, remain submerged and resurface. They are water-tight so that when submerged they do not fill up with water and so lose their buoyancy. Also they have buoyancy tanks into which water is allowed to enter and so increase the mass of the submersible. This makes it submerge. But that water can be pumped out to increase the buoyancy when the submersible wishes to return to the surface.
Infinitely many. Infinitely many. Infinitely many. Infinitely many.
Infinitely many. Infinitely many. Infinitely many. Infinitely many.
so many hours
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.
alvin
no
Submersibles work on undersea oilwells, recover practice torpedoes, search for sunken ships or things that have fallen off ships and sunk.
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.
Submersibles are watercraft designed to operate underwater for scientific research, ocean exploration, and military purposes. They can reach depths that are not easily accessible by humans and are equipped with specialized instruments to study marine life, geological features, and underwater environments. Submersibles come in various sizes and shapes, from small remotely operated vehicles (ROVs) to large manned submersibles capable of carrying crew members to extreme depths.
Bathyscapes and submersibles have.
Submersibles are used for exploring underwater life fartherbeneath the surface then humans can go UNequipt. John Wikes Booth invented the submersible. Its is also a small nonmilitary nonnuclear submarine that is used for exploration.
There are many types of submersibles some of them are; ROV's (Remotely Operated Vehicles), AUV's (Autonomus Underwater Vehicles), MIR-1 and MIR-2 which are operatred by the Shirshov Institute of Oceanography, the Alvin model which is operated by Woods Hole Oceanographic Institute, the Johnson SeaLink submersible which is operated by the Harbor Branch Oceanographic Institute in Fort Pierce, Florida. That is just a few of the types of submersibles out there, if you need more go pick up a Marine Science text book.