When an aircraft is authorized to line up and wait, inform it of the closest traffic within how many flying miles requesting a full-stop, touch-and-go, stop-and-go, option, or unrestricted low approach to the same runway?

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When an aircraft is cleared to line up and wait, you need to give the pilot awareness of nearby traffic that could affect the upcoming approach. The requirement is to inform the pilot of the closest traffic within six flying miles that is requesting any of the specified approaches to the same runway. This six-mile window is chosen because it provides timely, relevant information about conflicts that could impact spacing on final or during a possible go-around, without overwhelming the pilot with traffic that’s farther away.

In this context, the other aircraft might be on final for a full-stop, or entering a touch-and-go, stop-and-go, option, or unrestricted low approach to the same runway, so knowing what’s within six miles helps the line-up aircraft anticipate and adjust as needed. Distances smaller than six miles could miss nearby traffic that still matters, while larger distances add noise without adding practical value for the immediate sequencing.