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Radius of class E airspace?

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Airspace, FAA Regulations, General Aviation

Can anyone point me to an FAA publication that defines the typical radius, or acceptable range of radius, of class E surface based and 700 AGL airspace around an airport?  When measuring the radius of class E airspace around several airports using Skyvector.com, I've found surface based class E anywhere from 4 to 6 NM (with some spot on at 4.4 NM just like class D), and the 700 AGL class E around surface based class G airports to be anywhere from 4.3 to 10+ NM radius.  I'm just wondering if there's any description in any sort of official FAA publication on how the radius is defined, or if it's purely on a case by case basis with no official boundaries on the size.  (I see that in FAA Order 7400.9Z each airport has its own specific dimensions defined, including any applicable radius, but it doesn't seem to give any sort of regulation on how that radius is established.)

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2 Answers

  1. Best Answer

    Russ Roslewski on Apr 26, 2016

    What you’re looking for is FAAO 8260.19G, Chapter 5, starting on page 5-2 and going for 40+ more pages.


    Warning, it’s very involved. Class E is determined on a case-by-case basis for each airport depending on the instrument approaches in use at that airport.

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  2. Skyfox on Apr 27, 2016

    Thanks for the info, Russ! I’ll dig into that and see what I can find.

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