This data set was acquired with a ship-based Navigation system during Nathaniel B. Palmer expedition NBP9208 conducted in 1992 (Chief Scientist: Dr. Carol Raymond). These data files are of MGDS:Nav format and include Primary Navigation data and were processed after data collection. 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.