The minimum navigation equipment for RNPC operation is

The minimum navigation equipment for RNPC operation is

• A. dual short range navigation systems
• B. two long range RNAV systems or one navigation system using the inputs from one or more sensor systems, plus one short range navigation system
• C. one certified long range RNAV system, plus a short range navigation system
• D. two short range navigation systems

Answer: (C)

The key idea is that RNPC relies on a primary, capable navigation source, with a reliable backup from a different type of navigation. For minimum equipment, you need one certified long-range RNAV system to define the RNPC route with the required performance, plus a short-range navigation system to provide a backup and cross-check if the primary source becomes degraded or unavailable. The long-range RNAV solves navigation over significant distances and can meet the RNPC performance criteria, while the short-range system (using conventional ground-based navaids or similar inputs) ensures you still have independent navigation information to maintain situational awareness and continuity. Having two long-range RNAV systems isn’t required for the minimum, and relying on two short-range navs wouldn’t satisfy the RNPC need for a robust, long-range RNAV capability.

The key idea is that RNPC relies on a primary, capable navigation source, with a reliable backup from a different type of navigation. For minimum equipment, you need one certified long-range RNAV system to define the RNPC route with the required performance, plus a short-range navigation system to provide a backup and cross-check if the primary source becomes degraded or unavailable. The long-range RNAV solves navigation over significant distances and can meet the RNPC performance criteria, while the short-range system (using conventional ground-based navaids or similar inputs) ensures you still have independent navigation information to maintain situational awareness and continuity. Having two long-range RNAV systems isn’t required for the minimum, and relying on two short-range navs wouldn’t satisfy the RNPC need for a robust, long-range RNAV capability.