What aural indication will you receive when passing the outer marker?

Passing the outer marker during an approach to an instrument landing system (ILS) provides a specific aural indication that is essential for pilots to recognize their position relative to the approach path. The accurate indication when passing the outer marker is a series of three short beeps, often represented by the sound pattern "Dash, Dash, Dash."

This audio cue is critical as it alerts the pilot that they are at a designated point along the approach path, typically around 4 to 7 miles from the runway, allowing for proper timing and execution of approach and landing procedures. This aural message serves as a confirmation of the aircraft's proximity to the runway and helps ensure situational awareness.

Understanding this indication reinforces the importance of staying alert to various auditory signals during IFR operations, especially under conditions that may reduce visibility, necessitating reliance on instruments and cues for safe navigation.