During what time period must clearance for LUAW be requested?

Clearance for LUAW, which stands for "Line Up And Wait," must be requested at all times but with certain restrictions. This procedure is used to enhance efficiency at busy airports while ensuring safety.

The requirement for requesting clearance at all times means that pilots must follow this protocol regardless of the time of day or the weather conditions, ensuring consistent safety and communication with air traffic control. The restrictions mentioned typically depend on factors such as traffic volume, runway configuration, and weather conditions, which may impose specific procedures or additional requirements.

This practice enhances operational safety as it assists controllers in managing arrivals and departures effectively, especially during busy periods or in complex traffic conditions. Therefore, it’s crucial for pilots to be aware of and adhere to this standard anytime they are cleared to use the runway.