FS2004 Inertial Navigation System flight2000it 14 years ago FS2004 Inertial Navigation System. Easy to use. Stores up to 99 waypoints. Waypoints are saved to a data file. Flight plans can be entered automatically. Displays position, heading, speed and times. Full instructions. By Julian Avisenis. 244 Kb FS2004 – Inertial Navigation SystemFSX/FS2004 – Inertial Navigation System– FS2004/FSX FSVNAV Vertical Navigation