This data set was acquired with a ship-based Trimble 20636-00SM Navigation system, Yokogawa Gyro Navigation system, Ashtech ADU2 Navigation system, and Navigation system during Nathaniel B. Palmer expedition NBP0301A conducted in 2003 (Chief Scientist: Dr. Philip Bart). These data files are of SHP format and include Primary Navigation data and were processed after data collection. Funding was provided by NSF grant(s): OPP00-94078.