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: Flying to Antarctica
    From: Brad Morris
    Date: 2019 Jan 21, 11:12 -0500
    Hello Kermit

    Thank you for the referenced post!  That did a much better job of reviewing the topic, by an actual pilot, then I could ever do.  

    I did encounter the grid referenced to meridian lines in the 1949 text.  They indicated that the grid was made by drawing a line parallel to the 0 to 180th meridian.  The direction away from the North Pole along the 180th meridian is "grid north".   

    The arithmetic is then (for north polar region) True direction plus west longitude equals grid direction.  True direction minus east longitude equals grid direction.  I am not quite sure what they mean by "true direction".  Is that the instantaneous course on the standard latitude/longitude globe?   I think so. 

    Your detailed post also described the weather.  My reference states that the grid system simplifies in that the wind direction remains constant.  


    On Jan 21, 2019 10:32 AM, "Antoine Couëtte" <NoReply_Couette@fer3.com> wrote:

    RE: Flying-Antarctica-Morris-jan-2019-g44042

    Hello to all,

    Let us not forget either about this accident when a DC10 hit Mount Erebus:


    This accident has been extensily studied in avaiiton Accidents, pointing out "latent errors" due to the false coordinates of Mount Erebus printed to the Flight Crew.

    Let them all rest in Heavenly Peace.

    And, as regards High Latitudes Air Grid-Navigation, it has been treated earlier, re:


    Best Regards to all,

    Antoine M. "Kermit" Couëtte

    My former company also flew once a direct Buenos Aires - Perth ferry flight on the A340 heading to the West due to the very strong prevailing Westwards Jets.

    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