This data set was acquired with a ship-based Ashtech ADU2 Navigation system, Yokogawa Gyro Navigation system, Trimble 20636-00SM Navigation system, and Navigation system during Nathaniel B. Palmer expedition NBP0301 conducted in 2003 (Chief Scientist: Dr. Lou Bartek). These data files are of SHP format and include Primary Navigation data and were processed after data collection. Data were acquired as part of the project(s): Transit, and funding was provided by NSF grant(s): OPP00-87392.