This data set was acquired with a ship-based Kongsberg EM120 Multibeam Sonar system during Nathaniel B. Palmer expedition NBP1004 conducted in 2010 (Chief Scientist: Dr. Teresa Chereskin). These data files are of MBSystem Compatible format and include Swath Bathymetry, Sidescan, and Acoustic Backscatter data that have not been processed. Data were acquired as part of the project(s): Drake Passage Current and Pressure Recording Inverted Echo Sounders (CPIES), and funding was provided by NSF grant(s): ANT06-36493.