what kind of operations are they used for?
Military uses include attacking enemy surface ships, aircraft carrier protection, blockade running; Civilian uses for submarines include marine science, salvage, exploration and facility inspection and maintenance
Submarine
Military uses include attacking enemy surface ships (merchant and military), or other submarines, aircraft carrier protection, blockade running, ballistic missile submarines as part of a nuclear strike force, reconnaissance, conventional land attack (for example using a cruise missile), and covert insertion of special forces. Civilian uses for submarines include marine science, salvage, exploration and facility inspection and maintenance. Submarines can also be modified to perform more specialized functions such as search-and-rescue missions or undersea cable repair. Submarines are also used in tourism and undersea archaeology.

when did raiders of the lost arc come out 1981 who was the protagonist of the film? Indiana Jones who played the character? Harrison Ford can you name some locations where the movie was shot? Filming took place on sets at Elstree Studios Studios, and on location in La Rochelle in France, Tunisia in North Africa and Hawaii. where is this city located? La Rochelle is a city in southwestern France and a seaport on the Bay of Biscay, a part of the Atlantic Ocean. when was it established? La Rochelle was founded during the 10th century how was it associated with the second world war? During the Second World War, Germany established a submarine naval base at La Pallice; the main port of La Rochelle can you explain in brief how these vehicles you just mentioned work? It is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability.
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Submarine [SEP] Introduction
In modern submarines, this structure is the "sail" in American usage and "fin" in European usage. A "conning tower" was a feature of earlier designs: a separate pressure hull above the main body of the boat that allowed the use of shorter periscopes. There is a propeller (or pump jet) at the rear, and various hydrodynamic control fins. Smaller, deep-diving and specialty submarines may deviate significantly from this traditional layout. Submarines use diving planes and also change the amount of water and air in ballast tanks to change buoyancy for submerging and surfacing.