This data set was acquired with a ship-based Navigation system during Laurence M. Gould expedition LMG0402 conducted in 2004 (Chief Scientist: Dr. Christopher Measures). 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 funding was provided by NSF grant(s): ANT02-30445.