This data set was acquired with a ship-based Ashtech ADU2 Navigation system, Seatex Seapath200 Navigation system, Yokogawa Gyro Navigation system, and Trimble 20636-00SM Navigation system during Nathaniel B. Palmer expedition NBP0408 conducted in 2004 (Chief Scientist: Dr. Stan Jacobs). 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 3 and Collaborative Research: Cross-slope exchanges at the Antarctic Slope Front (ANSLOPE), and funding was provided by NSF grant(s): OPP01-25172.