SIDE-SCAN SONAR is a method of surveying the bottom of the ocean
or other body of water to obtain detailed acoustic images,
frequently used to locate debris likely form aircraft accidents
or shipwrecks; the acoustic beam is directed perpendicularly to
the direction of travel.
Side-scan sonar (also sometimes called side scan sonar, sidescan sonar, side imaging sonar, side-imaging sonar and bottom classification sonar) is a category of sonar system that is used to efficiently create an image of large areas of the sea floor.
