Schematic diagram of a sidescan sonar towed instrument insonifying the seafloor (top) and the sidescan data record created (bottom). The intensity of sound reflected back from rocks, sediment and other features provides information on the distribution and characteristics of the seafloor morphology. Strong reflections (high backscatter) from boulders, gravel and positive topographic features facing the instrument are white, and weak reflections (low backscatter) from finer sediments and shadows are in black. (U.S. Geological Survey) Image courtesy of Submarine Ring of Fire 2002, NOAA/OER.
Related Links
Submarine Ring of Fire 2002: Seafloor Mapping
