This data set was acquired with a ship-based Ashtech ADU2 Navigation system, Navigation system, Trimble 20636-00SM Navigation system, Yokogawa Gyro Navigation system, and Seatex Seapath200 Navigation system during Nathaniel B. Palmer expedition NBP0402 conducted in 2004 (Chief Scientist: Dr. Martin Visbeck). 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): Cross-Slope Exchanges at the Antarctic Slope Front (AnSlope), Leg 2 and Collaborative Research: Cross-slope exchanges at the Antarctic Slope Front (ANSLOPE), and funding was provided by NSF grant(s): OPP01-25172.