Two On A Big Ocean The Story of the First Circumnavigation
of the Pacific Basin
in a Small Sailing Ship


      

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Re: C.Plath on Ebay

From: Courtney Thomas (no email)
Date: Fri Jun 10 2005 - 10:44:51 EDT

  • Next message: George Huxtable: "Re: Plastic sextants and prejudice. was: GPS shortcomings."

    Then the SNO-M does not have the collimation error adjustment ?

    Thank you,
    C.Thomas

    On Fri, 2005-06-10 at 02:05, Alexandre Eremenko wrote:
    > Yes, of course.
    > This picture could be used in a beginner's
    > textbook to explain what is "collimation error":-)
    > Modern sextant scopes (for the reasons that excape me)
    > do not have collimation error adjustment,
    > with one exception: the inverting scope of SNO-T.
    > Once Bill suggested to adjust collimation error
    > with a hammer...
    >
    > This is apparently what the owner of this sextant did,
    > and after he failed, he sells the sextant:-)
    >
    > Alex.
    >
    > On Thu, 9 Jun 2005, Robert Eno wrote:
    >
    > > Have a look at this sextant on e-bay.
    > >
    > > Are my eyes deceiving me or is the rising piece on the scope bent out of shape?
    > >
    > > http://cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&category=37971&item=7328115519&rd=1
    > >


  • Next message: George Huxtable: "Re: Plastic sextants and prejudice. was: GPS shortcomings."



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