This data set was acquired with a ship-based Navigation system during Nathaniel B. Palmer expedition NBP9401 conducted in 1994 (Chief Scientist: Dr. John Anderson). These data files are of SHP format and include Primary Navigation data and were processed after data collection. Data were acquired as part of the project(s): Geologic Record of Late Wisconsin/Holocene Ice Sheet Advance and Retreat from Ross Sea, and funding was provided by NSF grant(s): OPP91-19683.