What action is required when you are aware of a holding pattern before the aircraft reaches a fix?

When an aircraft is approaching a fix where a holding pattern is expected, it is essential to prepare for the situation by getting ready to provide holding instructions if no clearance has been issued. This proactive approach is crucial because it ensures that the aircraft is safely managed in accordance with air traffic control procedures and maintains separation from other aircraft.

Being prepared allows the controller to efficiently communicate the necessary holding pattern details—such as the defined entry procedure, expected altitude, and the amount of time to hold—thus minimizing any potential confusion or delays for the pilot. This is especially important in busy airspace where timely and clear instructions can prevent disruptions in the flow of air traffic.

The other options would not adequately address the situation. Allowing the aircraft to proceed without interruptions may lead to further complications if holding is indeed required. Diverting the aircraft to a nearby airport might be unnecessary and could divert from the original plan unless it is imperative for safety. Contacting maintenance is unrelated to the operational needs of managing the aircraft in a holding situation. Therefore, being prepared to give holding instructions is the most appropriate course of action.