okeanos explorer okeanos scientific computing system SCS noaa fleet R337 multibeam multibeam sonar telepresence sub-bottom profile mapping survey multibeam backscatter water column backscatter singlebeam sonar single beam sonar single-beam sonar deep-sea exploration high-definition underwater video underwater video exploration vessel Ocean Exploration and Research (OER) Okeanos Explorer Discovery Keywords This is a list of static and vetted keywords to assist in search and discovery of Ocean Exploration and Research (OER) Okeanos Explorer related records.