SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/pilot-transponder-ident

When should a pilot press the transponder IDENT button?

Only when ATC asks for it.

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  1. Only when ATC requests it ✔
  2. Each time you check in with a new controller
  3. Every 10 minutes in busy airspace

Why: IDENT makes your target stand out on the controller's screen. Pressing it when not asked can confuse the controller, so use it only on request.

Huh, didn't know that: The AIM also says to avoid passing through codes 7500, 7600 or 7700 when changing codes, since they trigger alarms.

The dad joke
I pressed IDENT without being asked. Now the controller wants to know who I really am.
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References

Answer: Only when ATC requests it. IDENT makes your target stand out on the controller's screen. Pressing it when not asked can confuse the controller, so use it only on request.

  1. AIM Chapter 4 Section 1, Services Available to Pilots www.faa.gov/air_traffic/publications/atpubs/aim_html/chap4_section_1.html
    Activate the “IDENT” feature only when requested by ATC.
    Checked 2026-10-09.

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