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    Re: thank you Jim
    From: M M
    Date: 2003 Feb 20, 09:19 -0500

    Jim - thank you for your advice and pdf too, I can read it fine... though 
    understanding details will take atleast this evening :-)!
    
    Joined just sextant group as you adviced, thanks.
    
    Now, I'll need some time for further investigations!
    
    Hoping to get back here to other navigation topics.
    
    Mika
    
    ----- Original Message -----
    From: Jim Dullea 
    Date:         Thu, 20 Feb 2003 08:31:36 -0500
    To: NAVIGATION-L{at}LISTSERV.WEBKAHUNA.COM
    Subject:      Re: Help needed on using C.Plath sextant from 1928
    
    > Mika,
    >
    > I hope this isn't a copy of the multiple sources for using a vernier you are
    > going to get.  Attached is a pdf file (which I hope you can open) from the
    > sextant group on Yahoo.com at  http://groups.yahoo.com/group/sextants/
    > Which you can join.  There are lots of files, manuals etc  on sextant use,
    > history and other items of interest.
    >
    > Best source I have seen is Peter Ifland's book...Taking the Stars which you
    > might look for.
    >
    > Hope this helps..
    >
    > Jim Dullea
    > Tech Marine Business, Inc
    >
    > -----Original Message-----
    > From: Navigation Mailing List [mailto:NAVIGATION-L{at}LISTSERV.WEBKAHUNA.COM]
    > On Behalf Of m m
    > Sent: Thursday, February 20, 2003 2:12 AM
    > To: NAVIGATION-L{at}LISTSERV.WEBKAHUNA.COM
    > Subject: Help needed on using C.Plath sextant from 1928
    >
    > Hi,
    >
    > I have borrowed a C Plath sextant (year model 1928) in order to test whether
    > if it is still accurate and functional or not.
    >
    > It's in pretty good shape and You can see a colour shot of it at address:
    > http://www.geocities.com/jr_seaman/untitled-1.jpg
    >
    > Now, I would like to ask you how to read the exact angle value.
    >
    > There is an magnifying glass at the end of the moving arm. This view's lower
    > part is pointed to a little scale from 0 to 10 while each one of these
    > number gaps is divided further to six sub gaps. So 60 sub gabs plus 3 more
    > before 0 and 3 more after 10. The views upper part sees the angle scale. So
    > in a way this view's value must be a combination of upper and lower
    > scales...
    >
    > You can move the magnifying glass over and around that scale area and lock
    > it with a screw.
    >
    > Do you have a clue what is the correct way to use these parts and read the
    > values in order to obtain the very exact angle value?
    >
    > I would appreciate any help on this. Link to some manual would be as great
    > help!
    >
    > I would also like to hear your opinion about repairing this sextant abroad
    > in case it needs fixing - or should it be fixed at all?
    >
    > Thank you in any case!
    > Kind regards Mika
    > UT+2
    >
    >
    > --
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    > http://www.mail.com/?sr=signup
    << How does a vernier work.pdf >>
    
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