This data set was acquired with a Echosounder, Navigation System and Gravimeter during R/V Nathaniel B. Palmer expedition NBP1802 conducted in 2018 (Chief Scientist: Dr. Alison Macdonald, Investigator: Dr. Alison Macdonald). These data files are of MGD77 format and include Bathymetry, Gravity Field, Gravity Free Air Anomaly and Navigation data that have not been processed. Data were acquired as part of the project(s): Collaborative Research: Global Ocean Repeat Hydrography, Carbon, and Tracer Measurements, 2015-2020. Funding was provided by NSF award(s): OCE14-37015.