Which statement best describes RNAV and RNP concepts in avionics operations?

Which statement best describes RNAV and RNP concepts in avionics operations?

• A. RNAV uses onboard navigation to fly routes; RNP adds performance requirements and monitoring for accuracy and containment.
• B. RNAV requires ground-based beacons; RNP eliminates monitoring.
• C. RNAV uses external beacons only; RNP increases system weight and reduces reliability.
• D. RNAV and RNP are the same concept; RNP is just a newer term.

Answer: (A)

The main idea here is that RNAV provides the aircraft’s onboard navigation capability to fly defined routes, while RNP adds a quantified performance requirement with ongoing monitoring to ensure the path is followed within a specified tolerance and containment area. RNAV uses the aircraft’s own sensors—such as GNSS and inertial systems—to navigate a route without relying on ground-based navaids. RNP builds on that by prescribing a navigation performance value (the required accuracy) and requiring real-time monitoring to confirm the aircraft remains inside the designated containment. This monitoring and the performance standard are what make RNP more stringent than RNAV alone. So the best description is that RNAV uses onboard navigation to fly routes, and RNP adds performance requirements and monitoring for accuracy and containment. It’s not about requiring ground beacons, nor about eliminating monitoring, nor are RNAV and RNP the same concept.

The main idea here is that RNAV provides the aircraft’s onboard navigation capability to fly defined routes, while RNP adds a quantified performance requirement with ongoing monitoring to ensure the path is followed within a specified tolerance and containment area. RNAV uses the aircraft’s own sensors—such as GNSS and inertial systems—to navigate a route without relying on ground-based navaids. RNP builds on that by prescribing a navigation performance value (the required accuracy) and requiring real-time monitoring to confirm the aircraft remains inside the designated containment. This monitoring and the performance standard are what make RNP more stringent than RNAV alone.

So the best description is that RNAV uses onboard navigation to fly routes, and RNP adds performance requirements and monitoring for accuracy and containment. It’s not about requiring ground beacons, nor about eliminating monitoring, nor are RNAV and RNP the same concept.