{"thcode":61,"term":{"code":404,"name":"single-beam echo sounder","parent":401,"scope":"acoustic technique for determining sea-floor depth directly below the instrument platform."},"uf":[{"name":"fathometer","usewith":false},{"name":"single beam echo sounder","usewith":false},{"name":"single beam echosounder","usewith":false},{"name":"single-beam echosounder","usewith":false}],"bt":[{"code":401,"name":"acoustic methods","parent":400,"scope":" measurement of sound propagation in a given medium (such as water) for ranging or acoustical studies."},{"code":400,"name":"field observation","parent":398,"scope":"scientific investigation of physical or biological features and processes in a natural setting."},{"code":398,"name":"research method","parent":1,"scope":null},{"code":1,"name":"Marine Realms Information Bank (MRIB) keyword categories","parent":null,"scope":null}],"nt":[],"rt":[{"code":719,"name":"marine geology","parent":711,"scope":"used for geological and related studies of ocean basins and margins."},{"code":738,"name":"marine geophysics","parent":734,"scope":"used for geophysical and related studies of ocean basins and margins."}]}