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    Re: Bubble Sextant
    From: Gary LaPook
    Date: 2008 Aug 19, 12:29 -0700
    I have to correct my perevious post, the sextant available on ebay was misidentified as an MA-2 bubble sextant but looking at the picture clearly shows that it is the much rarer and desirable MA-1 pendulous mirror type. You can see that there is no bubble chamber that would be mounted on top of an MA-2. Look at :

      http://home.earthlink.net/%7Es543t-24dst/airnav/index.html
    
    to see for yourself. This is a desirable sextant bcause there is no bubble chamber so this eliminates the common problem of the bubble chamber losing its fluid and becoming useless. It is also desirable because you get a clear line to use for the reference point rather than the less precise middle of the bubble.
    
    Ebay link:
    
    http://cgi.ebay.com/Kollsman-Handheld-Aircraft-Sextant-Bubble-Type-1972_W0QQitemZ150284713834QQcmdZViewItem?hash=item150284713834&_trkparms=72%3A1011%7C39%3A1%7C66%3A1%7C65%3A12%7C240%3A1318&_trksid=p3286.c0.m14
    
    
    gl


    glapook@pacbell.net wrote:
    There is an MA-2 for sale on ebay now and these don't come along
    often. The MA-2 was the penultimate developement of the handheld
    bubble sextant. It is the Kollsman periscopic sextant without the
    periscope and it has the same averager. See here for more
    information:  http://home.earthlink.net/%7Es543t-24dst/airnav/index.html
    
    Ebay link:
    
    http://cgi.ebay.com/Kollsman-Handheld-Aircraft-Sextant-Bubble-Type-1972_W0QQitemZ150284713834QQcmdZViewItem?hash=item150284713834&_trkparms=72%3A1011%7C39%3A1%7C66%3A1%7C65%3A12%7C240%3A1318&_trksid=p3286.c0.m14
    
    
    gl
    
    On Jul 10, 6:54 pm, "Gary J. LaPook" <glap...@pacbell.net> wrote:
      
    My fravorite is my MA-1 which isn't a bubble sextant but a pendulous
    mirror type and my second favorite is the MA-2 with a bubble. If you
    want a light, simple sextant get a Bendix A-7, it is the lightest bubble
    sextant I have.
    
    gl
    
    glap...@pacbell.net wrote:
        
    Here is a link to a site with discriptions of many types of bubble
    sextants:
          
    http://home.earthlink.net/%7Es543t-24dst/airnav/index.html
          
    gl
          
    On Jul 5, 3:19 am, glap...@pacbell.net wrote:
          
    You should also check the files section of the Yahoo sextant group for
    more information on sextants.
            
    http://groups.yahoo.com/group/Sextants/files/
            
    gl
            
    On Jul 3, 5:14 pm, bubi352 <benjaminriec...@hotmail.com> wrote:
            
    I am new to this group and new to celestial navigation. I currently
    work as an airline pilot and fly extensively over water at night. I
    have developed a keen interest in determining my position the old
    fashion way.
              
    Could someone tell me which bubble sextant I should buy?
    What should I be looking on a bubble sextant?
    Where can I buy one?
              
    Thank you in advance.
              
    Bubi
              
    
    
      


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