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Enroute domestic areas

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Airspace, General Aviation

I've been reading what I can find about enroute domestic areas but I'm still a bit confused as to exactly what it is and where to find it.  In reference to the only other question I could find about it on this site (http://www.askacfi.com/27343/class-e-enroute-domestic-areas.htm), looking at Ruth Airport (T42) that John mentioned in the answers, I don't see anything around the airport that appears to be anything other than class E-1200AGL airspace.  The original question writer mentions a zippered area where the class E airspace runs from 9500 to 18,000 MSL, but the only zippered area I see is out over the ocean where it separates the 1200 AGL class E along the coast from the 5500 AGL class E farther out over the water.  Is that what's being referred to?  Because from what I can see that shows class E-1200AGL over Ruth which would put the floor at roughly 3981 MSL.  I'm not seeing anything that refers to class E starting at 9500 MSL whether on the Klamath Falls or the San Fransisco sectionals.

 

Secondly, does that zippered airspace boundary over the water indicate an enroute domestic area?  If so, then in reference to the airspace on the Houghton (CMX) VOR-DME 332° radial around 39NM, just south of Isle Royale, is that other-altitude class E airspace with a 2600MSL base along V133 correctly called an enroute domestic area?  Or is that called something else?

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1 Answers



  1. Russ Roslewski on Nov 28, 2016

    For the first question, around Ruth T42, the airspace has presumably changed since that other post was written almost 2 years ago. It would be interesting to see a chart from back then to compare, but I do not have one.

    You will notice that a lot of the “lesser known” airspace has disappeared in the past few years. Literally the past very few years. There used to be a very noticeable Blue shaded line dividing Class E 14,500 MSL floor airspace from Class E 1200 AGL floor airspace starting in North Dakota and working it’s way over to the mountain states and down toward Mexico. Now it is no longer there, it’s all Class E 1200 AGL floor like most of the rest of the U.S. There are still some of these areas, little wedges and cutouts around – I still see some in North and South Dakota.

    If someone reads this post in another 2 years, these areas may also no longer exist.

    For your second question, according to the legend the zippered airspace boundary is just where the floor of the Class E changes. The offshore instances of this, according to the Aeronautical Chart User’s Guide, is called an Offshore Control Area.

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