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: Astra Micrometer Dial Calibration
    From: Greg Rudzinski
    Date: 2011 Jul 21, 11:41 -0700

    Bill S ,

    Most sextants have a micrometer drum set screw on the end of the drum which connects the drum to the worm gear shaft. My best guess on the Astra from the YouTube video (http://www.youtube.com/watch?v=kJyDDbQXBE4) is that there is a cap or cover over the set screw on the end of the micrometer drum. If this is the case then 1. Align the index arm mark to any whole degree 2. Loosen micrometer drum set screw 3. Rotate the micrometer drum to the zero mark and tighten but not too tight since there are plastic parts involved. Check your manual to see if there is a parts diagram. Good luck.

    Greg Rudzinski
    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