Oceanography for Long Range Sonar in Atlantic Area B for May. Open PDF Document Details Document Type Technical Report Publication Date Apr 01, 1963 Accession Number ADA071229 Entities Organizations Naval Oceanographic Office Tags DTIC Thesaurus Topics Acoustic Impedance Bottom Bounce Bottom Loss Convergence Convergence Zones (Sonar) Detection Figure Of Merit Frequency Grazing Angles Losses Low Density Reflectivity Seabed Sediments Silt Sonar Turbidity Currents