Sonar. Chapter 9. History. Sound Navigation And Ranging (SONAR) developed during WW II Sound pulses emitted reflected off metal objects with characteristic ping Like radar and lidar time of flight is measured to determine distance Early sonar gave only distance and direction to target
Acoustic data points collected along intertwining transects in Rehoboth Bay, Delaware. The points are classified as algae (green) or no algae (light blue). The points were processed and used to derive a coarse map of the algae distribution (dark green squares).