What must be maintained during RNAV approach operations?

What must be maintained during RNAV approach operations?

• A. GNSS integrity
• B. Radar coverage
• C. Visual references
• D. Fuel on board

Answer: (A)

RNAV approaches rely on GNSS to provide precise, continuous position information. The essential requirement is GNSS integrity—the ability to trust the navigation solution within known error bounds, with fault-detection (RAIM or equivalent) to catch any satellite or receiver faults. If GNSS integrity can’t be assured, the published path can’t be relied upon, and you’d need to discontinue the approach or switch to an alternate navigation method. Radar coverage isn’t a requirement for RNAV approaches, and visual references aren’t a prerequisite for the instrument segment—they may be used only if conditions permit. Fuel on board is a planning parameter, not something you must actively maintain as part of the RNAV navigation integrity.

RNAV approaches rely on GNSS to provide precise, continuous position information. The essential requirement is GNSS integrity—the ability to trust the navigation solution within known error bounds, with fault-detection (RAIM or equivalent) to catch any satellite or receiver faults. If GNSS integrity can’t be assured, the published path can’t be relied upon, and you’d need to discontinue the approach or switch to an alternate navigation method. Radar coverage isn’t a requirement for RNAV approaches, and visual references aren’t a prerequisite for the instrument segment—they may be used only if conditions permit. Fuel on board is a planning parameter, not something you must actively maintain as part of the RNAV navigation integrity.