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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