FE Civil Engineering Exam Prep

Answer: A - Sidescan sonar is a system that is used for detecting objects on the seafloor. Side scan transmits sound energy in the shape of a fan that sweeps the seafloor. The returned signal that has bounced off objects on the ocean bottom is analyzed to create an image of the sea floor. Side scan sonar is typically used with single or multibeam sonar systems to conduct hydrographic surveys.