This data set was acquired with a ship-based Trimble 20636-00SM Navigation system, Yokogawa Gyro Navigation system, and Seatex Seapath200 Navigation system during Nathaniel B. Palmer expedition NBP0506 conducted in 2005 (Chief Scientist: Dr. Miles McPhee). 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): Maud rise Non-linear Equation of State Study, and funding was provided by NSF grant(s): ANT03-37159.