{"thcode":61,"term":{"code":738,"name":"marine geophysics","parent":734,"scope":"used for geophysical and related studies of ocean basins and margins."},"uf":[],"bt":[{"code":734,"name":"geophysics","parent":639,"scope":"physics applied to the study of the Earth."},{"code":639,"name":"discipline","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":402,"name":"multibeam echo sounder","parent":401,"scope":"acoustic technique for determining sea-floor depths in a wide swath centered below the instrument platform."},{"code":403,"name":"sidescan sonar","parent":401,"scope":"acoustic technique for producing oblique imagery of the sea floor."},{"code":404,"name":"single-beam echo sounder","parent":401,"scope":"acoustic technique for determining sea-floor depth directly below the instrument platform."}]}