If the approach RAIM is not available, what action should be taken regarding GPS approaches?

When RAIM (Receiver Autonomous Integrity Monitoring) is unavailable, it indicates a lack of confidence in the integrity of the GPS signals being received. RAIM is crucial for ensuring that the GPS system is providing accurate and reliable positional information. Without this integrity check, there is an increased risk of navigation errors, which can lead to safety concerns while conducting GPS approaches.

Therefore, the appropriate course of action when RAIM is not available is to refrain from performing those GPS approaches. Utilizing GPS without RAIM compromises the reliability of the navigation system, which is essential for maintaining safety during approaches, particularly in critical phases of flight. It's important to utilize alternative navigation methods or hold off on the approach until the RAIM is available again, ensuring that the aircraft operates within a safe environment.