This data set was acquired with a ship-based Navigation system during Laurence M. Gould expedition LMG0413A conducted in 2004 (Chief Scientist: Dr. Ronald Naveen). 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): Long-Term Data Collection at Select Antarctic Peninsula Visitor Sites and Cape Shirreff Field Camp Opening, and funding was provided by NSF grant(s): ANT02-30069.