1.1K views · 61 reactions | Sonar, short for Sound Navigation and Ranging, is helpful for exploring and mapping the ocean because sound waves travel farther in the water than do radar and light waves. NOAA scientists primarily use sonar to develop nautical charts, locate underwater hazards to navigation, search for and map objects on the seafloor such as shipwrecks, and map the seafloor itself. https://oceanservice.noaa.gov/facts/sonar.html | National Ocean Service | Facebook

Sonar technology has changed the way we understand history. By using sound waves, we are able to "see" underwater, develop nautical charts, and map objects below the surface. 🗺️📍 In the search for the sunken SS City of Chester, this team of maritime investigators is scanning the seafloor of the San Francisco Oakland Bay to uncover fascinating remnants of the shipwreck, regarded as the worst ever maritime tragedy at the Golden Gate. Using this data, researchers are able to determine what caused