This data set was acquired with a ship-based Navigation system during Nathaniel B. Palmer expedition NBP0601 conducted in 2005 (Chief Scientist: Dr. Giacomo DiTullio). 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): Interaction of iron, light and CO2 on phytoplankton community dynamics in the Ross Sea, and funding was provided by NSF grant(s): ANT03-38097, ANT03-38157, ANT03-38164, and ANT03-38350.