This data set was acquired with a ship-based Kongsberg EM120 Multibeam Sonar system during Nathaniel B. Palmer expedition NBP0402 conducted in 2004 (Chief Scientist: Dr. Martin Visbeck). These data files are of MBSystem Compatible format and include Acoustic Backscatter, Swath Bathymetry, and Sidescan data that have not been processed. Data were acquired as part of the project(s): Cross-Slope Exchanges at the Antarctic Slope Front (AnSlope), Leg 2 and Collaborative Research: Cross-slope exchanges at the Antarctic Slope Front (ANSLOPE), and funding was provided by NSF grant(s): OPP01-25172.