This data set was acquired with a ship-based SeaBeam 2112 Multibeam Sonar system during Nathaniel B. Palmer expedition NBP9903 conducted in 1999 (Chief Scientist: Dr. Eugene Domack). 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 as part of the project(s): Palmer Deep, Andvord Bay and Lallemand Fjord Geology and Geophysics Studies, and funding was provided by NSF grant(s): OPP94-18153.