WASHINGTON (DC News Now) — Following a man being recovered from the Anacostia River on Monday afternoon, DC Fire and EMS explained how they use Sonar for such searches and rescues. Sonar stands for sound navigation and ranging – or sonic navigation and ranging. It’s a technique that uses sound propagation to navigate, measure distances […]
layers and salinity layers. all that has to do with the propagation of sound in it. it may get caught in the layer and duct. these are present the atmosphere, as well. in the water, people who deal with sound propagation and water are acutely aware of salinity and temperature levels. even if this is a ping, or a click if you listen to it, finding the plane and wreckage could be a completely different challenge depending upon depths, right? and how did this thing hit the water? did it hit the water in a sully sullenberger hudson river thing where it floated a while and sank? if so it will be a tight debris