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    Re: ReedNavigation.com calculator app
    From: Alexandre Eremenko
    Date: 2026 Oct 17, 04:03 -0700

    I agree with Frank's evaluation of fx-260, except one thing: the older model fx-250D is even better for navigation. The main advantage is that it has sexagesimal input option. This feature they discontinued long ago. I even once had a conversation with Casio representative on some exhibition, and asked why. He said "Who needs that?"

    But fx-250 needs a battery (which works for many years). I have both of them.

    Alex.

       
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