SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/ifr-odp-no-clearance

Can you fly an Obstacle Departure Procedure without an ATC clearance?

Yes, unless ATC assigns a different departure.

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  1. No, ATC must always approve it
  2. Yes, unless ATC has assigned a different departure ✔
  3. Only at night in IMC

Why: The AIM says an ODP may be flown without an ATC clearance unless ATC assigns an alternate departure. ODPs provide obstacle clearance by the least onerous route to the en route structure.

Huh, didn't know that: A SID, by contrast, requires an ATC clearance before you fly it.

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References

Answer: Yes, unless ATC has assigned a different departure. The AIM says an ODP may be flown without an ATC clearance unless ATC assigns an alternate departure. ODPs provide obstacle clearance by the least onerous route to the en route structure.

  1. AIM 5-2 Departure Procedures www.faa.gov/air_traffic/publications/atpubs/aim_html/chap5_section_2.html
    may be flown without ATC clearance unless an alternate departure procedure
    Checked 2026-10-10.

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FlyingStandard departure obstacle clearance assumes a minimum climb gradient of what?FlyingATC says 'cleared to the airport as filed.' What does that not include?FlyingATC says 'hold for release.' What does that mean?

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