Because FMS derived position is not dependent on ground based navaids, FMS navigation is usable in remote areas.

• A. True
• B. False
• C. Sometimes
• D. Not applicable

Answer: (A)

FMS navigation relies on onboard position sources rather than ground-based beacons. The Flight Management System determines its position from sensors like GPS and the inertial reference system (INS) and uses a navigation database to compute routes. With GPS available, the aircraft can navigate accurately without needing VORs, DMEs, or NDBs, which makes remote areas workable for navigation. If GPS were unavailable, INS could maintain flight path for a while, but position accuracy would drift over time. So, the statement is true: FMS-derived position does not depend on ground-based navaids, enabling navigation in remote areas.