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
    Latitude from date and length of daylight?
    From: Jared Sherman
    Date: 2005 Feb 13, 15:45 -0500

    I was in warmer climes recently and noticed "again" that traveling
    north/south, there's a big change in the amount of daylight at this time of
    year. And for some reason I thought, this should be a way that one can
    determine their latitude, no?
    If one times the length of the day at any given location (using whichever
    version of "sunrise" and sunset you prefer), and one knows the date relative
    to the equinox or solstice day, one should be able to calculate the latitude
    one is at, no? It seemed interesting, that with just a watch and calendar
    one should be able to get latitude this way. Since most modern watches run
    to better than a second a day, this would seem to be a reasonable navigation
    Has anyone seen a formula for this, or does anyone want to give it a try?

    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