Welcome to the NavList Message Boards.

NavList:

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

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    Name or NavList Code:
    Email:
       
    Reply
    Re: Longhand Sight Reduction
    From: Francis Upchurch
    Date: 2014 Jun 13, 05:08 -0700

    Thanks Hanno,

    your language is perfectly clear! Just my maths are not, likewise my technical drawing with design details. (see attached).

    I have attached 2 PDFs of the original Fuller scales done by Wayne Harrison some years ago. I'm sure he wont mind you using them.They will need to re-sized for whatever size tubes you use. I tried to send the miniFuller condensed scales, but these were huge 60mb files, having been heavily edited in Photoshop 7. If you want those, may have to send on disk when I get out of hopsital. (few weeks)

    I've never measured the length if the scales, but I think the original fuller scale is 41feet long.

    I have found the main accuracy issue is to get the height of the scales exactly the same otherwise you get mis-alignement.

    Hopefully, I'll be back in action soon and be able to help more.

    Best wishes to All

    Francis



    File:



    File:

      

    File:

      

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

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

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

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

    Email Settings

    NavList ID Code:

    Custom Index

    Subject:
    Author:
    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