ifr navigationFAA-published sample question (IRA, Aug 2021)
If Receiver Autonomous Integrity Monitoring (RAIM) is not available prior to beginning a GPS approach, the pilot should
A
continue the approach, expecting to recapture the satellites before reaching the FAF.
B
use a navigation or approach system other than GPS for an approach.✓ Correct Answer
C
continue to the MAP and hold until the satellites are recaptured.
Explanation
AIM 1-1-17 says that if RAIM is not available before the approach, the pilot should use another type of navigation and approach system, pick another destination, or delay the trip. Without integrity monitoring there is no assurance the GPS position is good enough for an approach, so starting it hoping to recapture satellites, or continuing to the missed approach point to wait for them, both rely on an unverified position.
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