Over the next several days, we're going to explore how seafloor mapping truly is the foundation for healthy oceans and a healthy planet. We'll start by looking at how we use sonar systems to map the seafloor, one "ping" at a time: http://oceanexplorer.noaa.gov/world-oceans-day-2015/mapping-the-seafloor-one-ping-at-a-time.html | NOAA Ocean Exploration