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I splurged on the metal E6B for my private training: https://asa2fly.com/metal-e6b-flight-computer/

A beautiful device... though I have to admit after getting the certificate I exclusively use Foreflight.

I have a couple of EB6s to show to my students but ever since scientific calculators were allowed in written tests, I have never used one myself. Law of cosines is good enough for wind triangles :). Worked for a commercial test as well as the ATP. It is a beautiful device though ...

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