This data set was acquired with a ship-based Kongsberg EM120 Multibeam Sonar system during R/V Nathaniel B. Palmer expedition NBP0908 conducted in 2009 (Chief Scientist: Dr. Teresa Chereskin). These data files are of PDF format and include Bathymetry images and were processed after data collection. Data were acquired as part of the project: Collaborative Research: Dynamics and transport of the Antarctic Circumpolar Current in Drake Passage, and funding was provided by NSF grant: ANT06-36493.