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    R: Plath Sextant Button
    From: Federico Rossi
    Date: 2003 Nov 25, 17:45 +0100

    Hi,
    I'm not sure but if the orange button is coaxial with the micrometer
    knob, it should serve to null the index error so you don' have to take
    it into account when you reduce the sight since what you read is
    directly the sextant altitude (intrumental altitude +/- index error).
    Hope can help.
    Federico
    
    -----Messaggio originale-----
    Da: Navigation Mailing List [mailto:NAVIGATION-L{at}LISTSERV.WEBKAHUNA.COM]
    Per conto di 
    Inviato: marted? 25 novembre 2003 15.36
    A: NAVIGATION-L{at}LISTSERV.WEBKAHUNA.COM
    Oggetto: Plath Sextant Button
    
    
    Hi everyone, I'm new to this list.  I've just obtained a very nice Plath
    Navistar Professional sextant and have a dumb question.  On the back of
    the micrometer drum is an orange plastic button.  What does that do?  Is
    it for a light to reading the vernier?  If so, where and how does one
    change the batteries?  I didn't get a manual with the unit.  Tnx in
    advance, Phil
    
    
    

       
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