This data set was acquired with a ship-based Navigation system during Nathaniel B. Palmer expedition NBP0305 conducted in 2003 (Chief Scientist: Dr. Patrick Neale). 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): Interactive Effects of UV Radiation and Vertical Mixing on Phytoplankton and Bacterioplankton in the Ross Sea, and funding was provided by NSF grant(s): ANT01-27037.