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: Great Circle Course via calculator & HO 208
    From: David Fleming
    Date: 2016 Oct 4, 23:47 -0700

    Bill B,

    While it is true that the small latitude circle representing 41 N is quite different from a great circle, the part of the great circle that connects two points located at 41 N and 1 degree of longitude apart (the short way not the long way) is for all practical considerations identical to the part of a constant latitude small circle connecting the same points again the short way.

    While I know nothing about how you made the path, and though you think it is part of a constant latitude circle there is not a chance in hell that Google Earth didn't draw a great circle to connect the points.  And for that part of the great circle .7576 degrees is the arc length.


    PS I'll not communicate further on this topic.

    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