This data set was acquired with a ship-based Kongsberg EM120 Multibeam Sonar system during Nathaniel B. Palmer expedition NBP1302 conducted in 2013 (Chief Scientist: Dr. Dennis Hansell). These data files are of MBSystem Compatible format and include Swath Bathymetry data that have not been processed. Data were acquired as part of the project(s): TRACERS, and funding was provided by NSF grant(s): ANT10-43454 and ANT11-42117.