This data set was acquired with a ship-based Navigation system during Nathaniel B. Palmer expedition NBP9604A conducted in 1996 (Chief Scientist: Dr. Walker Smith). 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): JGOFS Process I, and funding was provided by NSF grant(s): OPP95-30382 and OPP98-96290.