This data set was acquired with a Echosounder, Navigation System and Gravimeter during R/V Nathaniel B. Palmer expedition NBP1709 conducted in 2017 (Chief Scientist: Dr. Paul Matthias, Investigator: Dr. Paul Matthias). These data files are of MGD77 format and include Bathymetry, Gravity Field, Gravity Free Air Anomaly and Navigation data that were processed after acquisition.