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: Custom Polaris Table SHA / Dec 2020-2030
    From: Geoffrey Kolbe
    Date: 2019 Oct 21, 10:49 -0700

    Greg Rudzinski wrote:

    "I was not satisfied with the precision of annual corrections to the Polaris SHA and declination mean value as shown on page 256 of out of date Nautical Almanacs so I constructed a more precise custom Polaris SHA/dec table to be kept with out of date NAs. "

    Given that at a declination of 89.3°, a degree of SHA (longitude) is only about 2/3 of a nautical mile, why are you stating SHA to 0.1 minutes, or about two metres on the ground...? For the usual CelNav purposes, just stating SHA to the nearest degree would be good enough.

    Geoffrey Kolbe

    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