This data set was acquired with a Echosounder, Navigation System and Gravimeter during R/V Nathaniel B. Palmer expedition NBP1704 conducted in 2017 (Chief Scientist: Dr. Stephen Ackley, Investigator: Dr. Stephen Ackley). These data files are of MGD77 format and include Bathymetry, Gravity Field, Gravity Free Air Anomaly and Navigation data that have not been processed. Funding was provided by NSF award(s): OPP13-41717, OPP15-43483.