If proper interval cannot be maintained, what should be done?

In situations where the proper interval cannot be maintained, the appropriate action is to wave off. This procedure is crucial for ensuring safety and operational effectiveness in aviation. A waveoff allows aircraft to depart from their approach sequence and reposition, rather than risk a closer or potentially hazardous formation that may result from trying to maintain the interval at all costs.

Choosing to wave off ensures that each aircraft can safely gain the necessary separation to prevent collisions or unsafe flight conditions. It also allows for a reassessment of the situation and for pilots to regain control of their spacing. This procedure recognizes that sometimes it is better to prioritize safety and regroup rather than attempt to force a continuation of the approach under less-than-ideal conditions.

The other options, while they may seem viable in certain contexts, do not adequately address the urgency of maintaining safe intervals. Adjusting flight speed may not guarantee that the necessary separation will be achieved, simply creating further complications. Extending off the 180° position does not directly resolve the issue of interval confidence and can lead to additional challenges. Performing a tight turn could introduce unnecessary risks, especially if aircraft are already struggling with spacing. Thus, the choice to wave off appropriately prioritizes safety and operational integrity.