In theory, it should be much easier for ships to swim under the waves Sailing ships make good use of winds, harnessing the gusts of air to make a very effective form of propulsion.ĭiesel-powered ships stay on the surface for a different reason: their engines needĪ steady supply of oxygen to burn fuel. Ships battle and lurch across tough seas where no fish-worth its salt-would ever swim. Racing from one side of the planet to the other. The sea are a sign of energy, originally transmitted by the Sun and whipped up into winds, Oceans are most turbulent where wind meets water: on their surface. Photo of USS City of Corpus Christi at Pearl Harbor Naval Shipyard by Dustan Longhini courtesy of In this very unusual picture of a submarine in dry dock for maintenance, you can clearly see how big a submarine really is-and that it really is almost a perfect cylinder. It's hard to imagine how big they really are: like icebergs, virtually all of a floating sub is underwater. Photo: Submarine ahoy! When we see photos of submarines floating on the surface,
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