This data set was acquired with a ship-based Kongsberg EM120 Multibeam Sonar system during Nathaniel B. Palmer expedition NBP0502 conducted in 2005 (Chief Scientist: Dr. Julia Smith Wellner; Investigator(s): Dr. John Anderson). 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 while R/V Nathaniel B. Palmer was in transit, and funding was provided by NSF grant(s): ANT01-25922.