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SESK: Stuff Everyone Should Know · sesk.info/pilot-anti-ice-versus-deice

What is the basic difference between anti-icing and deicing equipment?

Anti-icing prevents ice, while deicing removes ice.

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  1. Both only detect ice
  2. Prevention versus removal ✔
  3. Heating versus navigation

Why: Anti-icing systems are intended to stop ice from forming. Deicing systems remove ice that has already accumulated.

Huh, didn't know that: Protected areas may include wings, tail surfaces, pitot openings, propellers, and windshields.

The dad joke
Anti-ice arrived early, but deice handled the leftovers.
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References

Answer: Prevention versus removal. Anti-icing systems are intended to stop ice from forming. Deicing systems remove ice that has already accumulated.

  1. FAA Pilot's Handbook of Aeronautical Knowledge, Chapter 7 www.faa.gov/sites/faa.gov/files/09_phak_ch7.pdf
    Anti-icing equipment is designed to prevent the formation of ice, while deicing equipment is designed to remove ice
    Checked 2026-10-09.

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