This data set was acquired with a ship-based Kongsberg EM120 Multibeam Sonar system during Nathaniel B. Palmer expedition NBP1107 conducted in 2011 (Chief Scientist: Dr. Teresa Chereskin). These data files are of ASCII format and include Swath Bathymetry data and were processed after data collection. Data were acquired as part of the project(s): Collaborative Research: Dynamics and Transport of the Antarctic Circumpolar Current in Drake Passage, and funding was provided by NSF grant(s): ANT06-36493.