If visibility falls below prescribed limits inside the FAF, what is allowed?

When visibility falls below prescribed limits inside the Final Approach Fix (FAF), the appropriate action is to ensure safety and compliance with regulations. Continuing the approach and landing under such conditions is not permitted, as it compromises safety standards set by aviation authorities.

Executing a go-around or diverting to an alternate airport, while they may be valid procedures in response to certain in-flight situations, do not align with the context of continuing an approach once specified visibility criteria have not been met. A missed approach might be a valid maneuver during an approach, but in this case, it is not directly related to the condition of visibility being below limits.

Therefore, the correct approach when visibility is below the prescribed limits is to execute a missed approach, ensuring that the aircraft safely retracts from the approach path until conditions improve, or a decision is made to pursue alternative routing.