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Experiment with Sonar How can you "see" a lake bottom or sea floor if the water is too muddy, too dark, or too deep? You can't, right? Well, not with your eyes. But you can "see" with sound waves. See how it works below, then find out what sonar is used for.  Fantastic Creatures | Birth of a Legend Eyewitness Accounts | Experimenting with Sonar Resources | Transcript | Site Map | Loch Ness Home Editor's Picks | Previous Sites | Join Us/E-mail | TV/Web Schedule About NOVA | Teachers | Site Map | Shop | Jobs | Search | To print PBS Online | NOVA Online | WGBH © | Updated November 2000 |