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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@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@LISTSERV.WEBKAHUNA.COM]
> On Behalf Of m m
> Sent: Thursday, February 20, 2003 2:12 AM
> To: NAVIGATION-L@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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<< How does a vernier work.pdf >>

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