This data set was acquired with a ship-based Navigation system during Robert D. Conrad expedition RC1209 conducted in 1968 (Chief Scientist: Dr. John Ewing). These data files are of Text File (ASCII)
This data set was acquired with a ship-based Navigation system during Thomas G. Thompson expedition TN224 conducted in 2008 (Chief Scientist: Dr. Steven Emerson). These data files are of Text File (AS
This data set was acquired with a ship-based Navigation system during Nathaniel B. Palmer expedition NBP0104 conducted in 2001 (Chief Scientist: Dr. Peter Wiebe). These data files are of MGDS:Nav form