A typical IFR clearance from a non-towered airport will usually go something like this: “N12345 is cleared to Podunk Airport via runway heading to 2000 then as filed. Climb and maintain 5000; expect 10,000 one-zero minutes after departure. Contact center on 123.45; squawk 1234. Time now:1620. Clearance void if not off by 1630. If not off by 1630, advise intentions by 1640. You’re released.” That gives you 10 minutes to get airborne. Is that enough? What does “off” mean? What if it takes you 12 minutes to take off after being released? What will ATC do?
Is Busting a Void Time A BIG Deal?
A typical IFR clearance from a non-towered airport will usually go something like this: N12345 is cleared to Podunk Airport via runway heading to 2000 then as filed. Climb and maintain 5000; expect 10,000 one-zero minutes after departure. Contact center on 123.45; squawk 1234. Time now:1620. Clearance void if not off by 1630. If not off by 1630, advise intentions by 1640. Youre released. That gives you 10 minutes to get airborne. Is that enough? What does off mean? What if it takes you 12 minutes to take off after being released? What will ATC do?
Key Takeaways:
- An IFR clearance from a non-towered airport includes a "clearance void if not off by" time and an "advise intentions by" time, which serves as a buffer for pilots to report airborne.
- ATC expects pilots to report airborne within the "advise intentions by" buffer, acknowledging they don't know the exact takeoff time from non-towered fields and allow for post-takeoff contact.
- Pilots should only request clearance when ready to depart within the typical 10-minute void window; if not, they should ask for a later void time or consider departing VFR.
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