This data set was acquired with a ship-based Gravimeter and Subbottom Profiler during Nathaniel B. Palmer expedition NBP9208 conducted in 1992 (Chief Scientist: Dr. Carol Raymond). These data files are of MGD77 format and include Bathymetry, Gravity (Field and Free Air Anomaly) data that were processed during the cruise. Data were acquired as part of the project(s): Marie Byrd Margin: Early Seafloor Spreading History, and funding was provided by NSF grant(s): OPP90-18742