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: The circumnavigator's paradox. was: Benetnasch and Alkaid revisited
    From: Bill B
    Date: 2005 Apr 6, 16:45 -0500

    > Thanks to Bill for a really interesting posting about "the
    > circumnavigator's paradox".
    I think I liked this article as it was the one that caused the little bulb
    over my head to light up.  I had read a half dozen articles on the date
    line, from grade school level up, complete with colorful diagrams, but never
    really grasped the concept. Just plug and chug based on a set of rules.
    My problem, as usual, frame of reference. I kept thinking of it in 20th
    century terms, calendar and watch.  With this article, the frame of
    reference shifted to Sun time.  Bingo, unification theory for the terminally
    slow.  I hop on an aircraft at LAN, head west and circle the globe at 15d
    per hour, and I arrive back at LAN.  Sun time, no time passed.  Digital
    watch shows the same time as when I left, but a day later despite the fact
    it had been LAN for me the whole flight.   Going west, I would see two "Sun
    days," but only one would pass on my watch.
    Now I don't need to remember any rules, I understand the concept.

    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