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: Double vial horizon prototype
    From: Paul Saffo
    Date: 2012 Jan 9, 19:00 -0800

    Very elegant work! A question and a thought:
    -consider using a used surveyor's tribrach for your leveling base. They are usu available on eBay for under $50 and will give you very precise control over the leveling screws. Then you can attach your plate/mirror to an adaptor that locks into the tribrach (seco -www.surveying.com makes one, but they can be had for less on eBay). I did this with some schott black glass and was pretty happy with the result, but you will def need bubble levels that rest atop the glass directly.

    -- and a question. Where are you getting the front-silvered glass? I've hunted around and can't find any that doesn't cost a fortune!

    (Paul Saffo paul@saffo.com)
    NavList message boards and member settings: www.fer3.com/NavList
    Members may optionally receive posts by email.
    To cancel email delivery, send a message to NoMail[at]fer3.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