This data set was acquired with a ship-based Navigation system during Nathaniel B. Palmer expedition NBP9506 conducted in 1995 (Chief Scientist: Dr. Ken L. 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): Seasonal Ice Cover and its Impact on Epipelagic Community in the Northwestern Ross Sea: Long Time-Series Monitoring, and funding was provided by NSF grant(s): OPP93-15029.