This data set was acquired with a Kongsberg Maritime EM122 Multibeam Sonar during R/V Nathaniel B. Palmer expedition NBP1801 conducted in 2017 (Chief Scientist: Dr. Grace Saba, Investigators: Dr. Grace Saba, Dr. Giacomo DiTullio, Dr. Robert Dunbar). These data files are of MBSystem-compatible format and include Acoustic Backscatter and Swath Bathymetry data that have not been processed. Data were acquired as part of the project(s): Estimation of Antarctic Ice Melt using Stable Isotopic Analyses of Seawater; Collaborative Research: Cobalamin and Iron Co-Limitation Of Phytoplankton Species in Terra Nova Bay; Using Bio-acoustics on an Autonomous Surveying Platform for the Examination of Phytoplankton-zooplankton and Fish Interactions in the Western Ross Sea. Funding was provided by NSF award(s): OPP16-44073, OPP16-44118, OPP17-43035.