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    US Navy and celestial...
    From: Alexandre Eremenko
    Date: 2017 Sep 14, 15:28 -0400

    This is frequently mentioned here:
    
    > In times when global navigation satellite systems may
    > be unavailable, due to natural interference, artificial interference, or a
    > failure or receivers, The Nautical Almanac remains an independent, primary
    > backup for determining the navigator's position at sea"
    
    Almanac remains. But the answers to these questions are unclear to me:
    How many USNavy officers are sufficiently trained to use CelNav?
    Do all Navy ships really carry sextants and almanacs? (I doubt it).
    
    Alex.
    

       
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