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What is a submersible?
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A submersible is a small submarine. A large, manned submersible is usually called a bathyscaph. In the type shown here, the two crew members sit in a thick metal sphere beneath the craft. The sphere's air is at normal atmospheric pressure. To make the craft float, a tank in the upper part is partly filled with petrol, which is less dense than seawater. To make the vessel sink, water is let into the tank. Metal weights are released to make the bathyscaph rise again. | | Submersibles regularly go down to depths of 6,000 metres to explore the ocean bed. |
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Previous:
Back
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Book:
1001
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Section:
Science and Technology
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Chapter:
Undersea Exploration
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