How Do Submarines Dive and Come Back Up? copertina

How Do Submarines Dive and Come Back Up?

How Do Submarines Dive and Come Back Up?

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Submarines are massive metal vessels, yet they can sink beneath the ocean's surface and rise back up at will—so how do they do it? The secret lies in ballast tanks, which fill with water to make the sub heavier and push it out to make it lighter, controlling whether it dives or floats. The episode also explains how periscopes let crews see above the waterline without surfacing and how special machines generate fresh air so everyone on board can breathe deep underwater.
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