When should you use the IDENT mode on your transponder?

The IDENT mode on a transponder is specifically designed to assist air traffic control (ATC) in identifying a particular aircraft on their radar screens. You should use the IDENT mode when requested by ATC because it provides a visual confirmation of your aircraft's position, especially in busy airspace or during critical communication exchanges. This request often comes during moments when ATC needs to clarify your position or when they are providing instructions that require enhanced situational awareness.

Using IDENT only upon ATC's request helps ensure that it is employed only when necessary, thus reducing the risk of misidentification or excessive clutter on radar displays. This practice allows both pilots and ATC to maintain clear communication and operational efficiency, particularly in crowded airspace.