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    Re: Mark V sextant - instruction manual
    From: Paul Hirose
    Date: 2022 Aug 3, 14:22 -0700

    Answering my own question, yes the US Navy Mark V is the same as the AN
    5851:
    
    "The AN 5851 (Army designation A-14, Navy designation Mark V), which
    followed in 1942, had a successful mechanical device that averaged 60
    discrete altitude readings taken over a period of two minutes. The AN
    5851-1 (Army designation A-IS) was essentially similar, but could obtain
    average readings for any period of time up to two minutes. These
    instruments were heavy, and so were designed to be suspended from an arm
    installed in the centre of the astrodome. Many were still in use in the
    1960s. Production was begun by Pioneer/Bendix and continued by the
    Eclipse-Pioneer Division of the Bendix Aviation Corporation (as the firm
    then was)."
    
    Deborah Warner, "Celestial navigation aloft: aeronautical sextants in
    the US"
    
    
    http://www.artefactsconsortium.org/Publications/PDFfiles/Vol5Mil/5.07.Military-Warner,SextantsGr75ppiFFFWEBF%20-%20Copy.pdf
    
    Her paper includes an extensive list of references.
    
    --
    Paul Hirose
    sofajpl.com
    

       
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