Instrument Rating Exam · Mock exam

A NOTAMed GPS outage for satellite PRN 14 is published. How should a pilot assess the impact on a planned GNSS LNAV approach?

• A.Run a RAIM prediction (e.g. NAIPS) for the approach time and location to confirm the remaining constellation gives adequate RAIM
• B.Assume GNSS will be completely unavailable for the whole flight and plan only for a ground-based ILS approach
• C.Ignore it entirely, since the loss of a single satellite can never affect RAIM availability predictions
• D.Manually exclude PRN 14 from the FMS solution and then continue with no further assessment being required