Slide rules actually can be faster than entering digital information into an electronic calculator.

I used a circular slide rule for winds (crosswinds) almost to the very end until I got a great real time app that did it for me. I did not have to wait for the wind information to be transmitted; it was transmitted real time to the iPad and my phone. That circular rule was the gold standard in aviation for so many years. I can operate that in my sleep.

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