This data set was acquired with a ship-based Kongsberg EM120 Multibeam Sonar system during Nathaniel B. Palmer expedition NBP0603 conducted in 2006 (Chief Scientist: Dr. Eugene Domack). These data files are of NetCDF Grid format and include gridded Swath Bathymetry data and were processed after data collection. Data were acquired as part of the project(s): Paleohistory of the Larsen Ice Shelf System, and funding was provided by NSF grant(s): ANT03-38101, ANT03-38109, ANT03-38142, ANT03-38163, and ANT03-38220.