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    Re: Long-range airplane navigation
    From: Frank Reed CT
    Date: 2004 Dec 1, 00:26 EST
    Alex E wrote:
    "Today, while exploring a new search engine
    from Google, I found several indications
    that CelNav with real sextants and real
    horizon (!) was used in at least two space missions:
    Skylab and Soyuz-17."
    There were some experiments with sextants aboard spacecraft in both manned space programs in the 60s and 70s, but they were never used for navigation in practice. Nevertheless, the devices refered to as "sextants" aboard spacecraft did have other uses. The primary function was to double-check spacecraft orientation. Also onboard "sextants" served as sighting telescopes on several moon missions.
    Frank R
    [ ] Mystic, Connecticut
    [X] Chicago, Illinois
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