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    Re: What do you do if horizon is not reliable?
    From: Tony Oz
    Date: 2019 May 20, 01:14 -0700

    Dear Igor,

    Yes, this is a convenient trick.

    Unfortunately not always one can find such an object in proper direction.

    Alas, once I saw a C&P with the bubble attachment on a flee market, but the price was beyond my budget. Now I sort of regret it...

    Warm regards,
    Tony

    60°N 30°E

       
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