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: Hp by Doniol for Aircraft
    From: Gary LaPook
    Date: 2014 Dec 2, 00:30 -0800
    See for illustration of precomputations:


    From: Greg Rudzinski <NoReply_Rudzinski@fer3.com>
    To: garylapook@pacbell.net
    Sent: Monday, December 1, 2014 6:41 PM
    Subject: [NavList] Re: Hp by Doniol for Aircraft

    Hv Doniol passes the Chichester test by doing the Hp and azimuth precalculations the day before so that all that is done during the flight are octant observations that are directly compared to Hp for an intercept. The plot goes down on the chart immediately. No inflight sight reduction calculating. Other methods of reduction can be used the same way to pass the Chichester test. Doing inflight sight reduction and flying a plane without an autopilot at the same time seems impossible but this is what Chichester did with the Bygrave over 80 years ago.
    Greg Rudzinski

    From: Hanno Ix
    Date: 2014 Dec 1, 17:13 -0800
    Thanks for those Hx - much more than I expected.
    You did not make those calculations / drawings during flight, did you?
    If you did, Does your exercise demonstrate the havDoniol is practical during flight?
    Did you do the calculations by hand?
    What changes would you make now that you have this experience ?
    Would you have preferred Bygrave or not? 
    In other words, do you think the havDoniol passes the Chichester test?

    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