This data set was acquired with a ship-based Navigation system during Nathaniel B. Palmer expedition NBP9301 conducted in 1993 (Chief Scientist: Dr. Lawrence Lawver). 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): Marine Heat Flow Around West Antarctica, and funding was provided by NSF grant(s): OPP90-19247.