If only RNAV approaches are available at destination and GPS fails, what should be considered?

If only RNAV approaches are available at destination and GPS fails, what should be considered?

• A. Diversion
• B. Continue approach using RNAV without GPS
• C. Switch to VOR approach
• D. Hold until GPS returns

Answer: (A)

RNAV approaches depend on GNSS to provide the lateral navigation guidance needed to fly the procedure. When GPS fails, you lose the primary means to conduct an RNAV approach to the destination. If the destination only offers RNAV approaches and no published non-GNSS instrument approach is available, there is no safe way to continue the landing. The correct action is to divert to an alternate aerodrome where a non-GNSS approach (such as VOR, NDB, or ILS) is available and suitable for landing. Holding for GPS to return isn’t practical, and continuing the approach using RNAV without GPS isn’t possible because the required navigation guidance is unavailable. Diversion is the prudent and required course of action.

RNAV approaches depend on GNSS to provide the lateral navigation guidance needed to fly the procedure. When GPS fails, you lose the primary means to conduct an RNAV approach to the destination. If the destination only offers RNAV approaches and no published non-GNSS instrument approach is available, there is no safe way to continue the landing. The correct action is to divert to an alternate aerodrome where a non-GNSS approach (such as VOR, NDB, or ILS) is available and suitable for landing. Holding for GPS to return isn’t practical, and continuing the approach using RNAV without GPS isn’t possible because the required navigation guidance is unavailable. Diversion is the prudent and required course of action.