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Graphic showing geophysical and sampling systems used to define the seafloor topography, surface sediments, and underlying geology. Sidescan-sonar systems acquire information about the surface of the seafloor, swath bathymetric systems measure the depth, or seafloor topography, seismic sources map the underlying geologic structure, single-beam echosounders map the depth at a point beneath the vessel, and sampling systems collect samples of the seafloor and can be equipped with digital camers and video systems to collect optical images of the seafloor.
Public Domain.
