If you lose sight of the runway after descending below the DH, what action should you take?

In a situation where you lose sight of the runway after descending below the Decision Height (DH), the appropriate action is to execute the missed approach procedure immediately. This procedure is critical for ensuring safety, as it acknowledges that a safe landing cannot be accomplished without visual references to the runway.

When descending below the DH, the expectation is that the runway will be in sight, allowing for a continued landing approach. If visual contact is lost at this point, it indicates that one cannot safely continue the landing due to insufficient visual references. The missed approach procedure is specifically designed to handle this situation, providing a predefined course of action that includes climbing to a safe altitude and following established navigation instructions.

This action helps maintain safety for the aircraft and crew and aligns with aviation regulations and protocols, which prioritize safe landing over attempting to continue under conditions that may lead to an accident. Therefore, executing the missed approach is crucial in such scenarios.