Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Position-Finding

Compose Your Message

Add Images & Files
    Re: Full moon sights and lifeboat sextant accuracy
    From: Greg Rudzinski
    Date: 2017 Oct 7, 11:13 -0700

    Attached are Moon and Sun observation sets for C&P vs. Davis MK 3 using a H2O liquid artificial horizon. Results are about what was expected. 

    Greg Rudzinski

    From: Greg Rudzinski
    Date: 2017 Oct 6, 17:53 -0700


    The liquid artificial horizon cuts the systematic errors in half so that the actual natural horizon intercepts due to systematic errors are going to be double that observed in the artificial horizon. I have three metal sextants (Tamaya Jupiter, C&P, and US Navy M,Low) that will all be at 1' intercepts or better using a x4 scope on the liquid artificial horizon. Making observations on a natural horizon from a sailboat cockpit will be a different story. 3' intercepts would then be concidered good if using a metal sextant.

    Greg Rudzinski

    PS I'll do a set of 10 observations each for you tomorrow. C&P with x4 scope vs. Davis MK 3 with sight tube (using a liquid artificial horizon).




    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