SESK: Stuff Everyone Should Know · sesk.info/ifr-alternate-precision
A precision approach alternate with no special alternate minimums needs what forecast ceiling and visibility at your ETA?
600 feet and 2 statute miles.
- 600 feet and 2 statute miles ✔
- 800 feet and 2 statute miles
- 400 feet and 1 statute mile
Why: 91.169(c) sets standard alternate minimums at 600-2 for a precision approach alternate. If the approach procedure lists its own alternate minimums, those apply instead.
Huh, didn't know that: For a nonprecision approach alternate, the standard is 800 feet and 2 statute miles.
"Fog is controlled by the airlines and is used to delay flights."
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References
Answer: 600 feet and 2 statute miles. 91.169(c) sets standard alternate minimums at 600-2 for a precision approach alternate. If the approach procedure lists its own alternate minimums, those apply instead.
- 14 CFR 91.169 IFR flight plan: information required www.law.cornell.edu/cfr/text/14/91.169
Ceiling 600 feet and visibility 2 statute miles.
Checked 2026-10-10.
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