This data set was acquired with a ship-based Navigation system during Nathaniel B. Palmer expedition NBP0606 conducted in 2006 (Chief Scientist: Dr. B. Gregory Mitchell). 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): Plankton community structure and iron distribution in the southern Drake Passage and Scotia Sea, and funding was provided by NSF grant(s): ANT04-44134.