AhaBulbStuff Everyone Should Know
AhaBulb: Stuff Everyone Should Know · ahabulb.com/pilot-class-c-two-way-radio

Approaching Class C, the controller replies with your call sign and 'standby.' May you enter?

Yes. Hearing your call sign means two-way communication is established.

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  1. Yes, communication is established ✔
  2. No, you need an explicit clearance
  3. No, you must squawk 7600 first

Why: Class C entry needs two-way radio communication, not a clearance. If the controller uses your call sign, even with 'standby,' you may enter. Without your call sign, communication is not established.

Huh, didn't know that: Class D works the same way: a reply using your call sign, even with 'standby,' means you may enter.

The dad joke
What letter of the alphabet has the most water? C.
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References

Answer: Yes, communication is established. Class C entry needs two-way radio communication, not a clearance. If the controller uses your call sign, even with 'standby,' you may enter. Without your call sign, communication is not established.

  1. AIM 3-2 Controlled Airspace (Class C) www.faa.gov/air_traffic/publications/atpubs/aim_html/chap3_section_2.html
    radio communications have been established and the pilot can enter the Class C airspace.
    Checked 2026-10-07.

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