This data set was acquired with a ship-based Navigation system during Nathaniel B. Palmer expedition NBP9606 conducted in 1996 (Chief Scientist: Dr. Robert Dunbar). 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): ROAVERS (Research on Ocean-Atmosphere Variability and Ecosystem Response in the Ross Sea), and funding was provided by NSF grant(s): OPP94-19605.