If you receive a RAIM error while on the RNAV(GPS) RWY 30 approach, what should you do?

In the case of a RAIM error during the RNAV(GPS) RWY 30 approach, the best course of action is to continue to the missed approach point and execute the missed approach instructions. RAIM stands for Receiver Autonomous Integrity Monitoring, which is a system that ensures the integrity of GPS signals used for navigation. If a RAIM error is indicated, it suggests that the integrity of the GPS navigation data may not be reliable.

Continuing to the missed approach point means you are still following the procedures outlined for the approach until you reach the point where a decision must be made—whether to continue landing or execute a missed approach. The missed approach instructions are specifically designed to ensure safe navigation away from the runway. This approach respects the integrity of the flight operation, adhering to established protocols even in the face of a potential navigation issue.

Choosing to abort the approach and circle around, descend to minimum safe altitude, or switch to an alternative navigation system could introduce additional risks or complicate the situation further, particularly if you are in a low visibility environment or have limited options for navigation at that moment. Therefore, following the missed approach procedures is the safest and most prudent action to take when a RAIM error occurs.