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 57 Navigational Stars (and Zuben'ubi)
    From: Fred Hebard
    Date: 2005 Apr 22, 10:40 -0400

    On Apr 21, 2005, at 9:42 PM, Herbert Prinz wrote:
    > It is true, since Polaris is always nearly on the meridian, a shot of
    > Polaris can give a very good latitude, if (!) one has local time; but
    > this feature is inherent in the geometry of the observation, not in the
    > method of reduction. Therefore, there is no need to make head stands
    > for
    > a special method of reduction. Besides, since Sumner's great discovery,
    > we have come to understand that latitude is just one specially named
    > line of position.
    Part of the attraction of Polaris may have been that it is a relatively
    easy calculation that a tired mariner could rely on more strongly than
    other lines of position.  Also, the Hs only differs from the colatitude
    by less than a degree, so there is an inherent check to the
    calculation.  And then there's tradition....

    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