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It's a relatively uncluttered airspace. Why have a TAC?

FAI Terminal Area Chart

Fairbanks, AK Terminal Area Chart depicting the Fairbanks TRSA and surrounding area

Arguably, Louisville, KY has at least the same complexity, and since it's UPS's hub it's far more active. Plus, it's a legit controlled airspace, instead of a terminal radar area.

SDF as shown on the St. Louis sectional

Portion of the St. Louis VFR sectional depicting the Louisville, KY Class C airspace and surrounding area

Are there historical reasons, reasons which aren't immediately obvious, or is it just some kind of cynical inflation of importance?

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    $\begingroup$ Fairbanks is just as much "legit controlled airspace" as Louisville is. Class E, by definition, is controlled airspace. $\endgroup$
    – randomhead
    Oct 27, 2021 at 16:57
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    $\begingroup$ Also note that the ICAO code for Fairbanks is not KFAI... which is yet another example of why pilots operating in the US should be in the habit of giving the three- or four-character FAA Location ID and NOT the four-letter ICAO code. $\endgroup$
    – randomhead
    Oct 27, 2021 at 17:11
  • $\begingroup$ I don't have an answer, but two differences are that PAFA has significant terrain close to the airport, and there's also a lot of military activity around it (at least, that's what some of the comments on the TAC imply). Neither of those things are an issue for KSDF. I used to fly out of KLOU, and I don't think anyone considers it "complex" airspace. The PAFA area looks a lot more complex to me, in fact. $\endgroup$
    – Pondlife
    Oct 27, 2021 at 17:16
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    $\begingroup$ @Pondlife I agree; KSDF is a pretty simple class C that I wouldn’t think twice about flying through. PAFA is part of a triple-primary TRSA with six non-towered airports in their surface areas, plus significant terrain and nearby SUA; I would appreciate the added detail of a TAC if I had to fly there VFR. $\endgroup$
    – StephenS
    Oct 27, 2021 at 19:24
  • $\begingroup$ Aside from the nearby military fields, PAFA has commercial aviation and a huge amount of GA traffic. In addition to the 'main' runway, there is a shorter paved runway as well as a gravel ski strip and a water runway. I count 6 visual reference points around the area. Much more variability than that organized stream of UPS traffic at SDF. $\endgroup$
    – Gerry
    Oct 27, 2021 at 22:40

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