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: Elements of the navigation triangle
    From: David Pike
    Date: 2018 Oct 29, 02:01 -0700

    Steve Bryant You wrote:
    Is it true that the Co-latitude and the Co-latitude will always be less than 90°? Is it true that the Co-declination may be either less than or greater than 90°?

    I always though co meant 90° minus.  If you’re using co-lat in the PZX triangle, then P and Z must be in the same hemisphere.  If X is also in that hemisphere, then you need co-dec, which will be less than 90°.  If X is in the opposite hemisphere, why not keep it simple and call the third side 90° + dec (which will be more than 90°)?  Then you don’t have the problem, or am I way off beam?  Wrt altitude, let's not visit the case of X being below the observer's horizon. DaveP

    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