Submarine

Submarine

A submarine is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term most commonly refers to a large, crewed vessel. It is also sometimes used historically or colloquially to refer to remotely operated vehicles and robots, as well as medium-sized or smaller vessels, such as the midget submarine and the wet sub.

History

The concept of underwater combat has roots deep in antiquity. There are images of men using hollow sticks to breathe underwater for hunting at the temples at Thebes, but the first known military use occurred during the siege of Syracuse (415 - 413 BC), where divers cleared obstructions, according to the History of the Peloponnesian War. At the siege of Tyre (332 BC), Alexander the Great used divers, according to Aristotle. Later legends from Alexandria, Egypt from the 12th century AD suggest that Alexander conducted submarine exploration.

Design

A submarine is a sealed container that houses people and a method of moving them underwater. The people and their equipment need to stay dry and maintain a normal atmospheric pressure, despite the water pressure outside.

Types of Submarines

There are several types of submarines, including military submarines, research submarines, and tourist submarines.

See Also

• Submersible
• Midget submarine
• Wet sub

References

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