Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    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.
    ----- Original Message -----
    From: Jim Dullea 
    Date:         Thu, 20 Feb 2003 08:31:36 -0500
    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
    > 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
    > --
    > __________________________________________________________
    > Sign-up for your own FREE Personalized E-mail at Mail.com
    > http://www.mail.com/?sr=signup
    << How does a vernier work.pdf >>
    Sign-up for your own FREE Personalized E-mail at Mail.com

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.

    Email Settings

    Posting Code:

    Custom Index

    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site