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: Ageton Classic SR Table PDF
    From: Francis Upchurch
    Date: 2015 Oct 28, 02:55 -0700

    Our esteemed friend Hanno Ix showed me how to do lunar clearance with Hv-Doniol  (with Lars modification?)  a few months ago before he unfortunately left us.

    The same Karl page 93 example.


    LDsd =  52 deg 23';

     Hsd  =  38 deg 40';

     hsd  =  30 deg 36'

        Lars                  with  lunar variables                       value

    Set:      PD           =      LDsd;                                        52deg 23'

                 N            =       hav ( Hsd - hsd )                         0.0049

                 P            =       hav( Hsd + hsd )                         0.3230

                 Q            =       P + N                                        0.3279  

    then   RBA          = arc hav [  (hav ( PD ) - N / (1 - Q) ]  =  64deg 12.9'



    RBA   =  64deg 12.9'

      Ho    =  38deg 38.7

       ho   =   31deg 21.4'

             hav - Doniol         with lunar variables              value

    Set:         n             =        hav ( Ho - ho )                        0.0040        

                   p             =        hav ( Ho +ho )                         0.3290      

                   q             =        p + q                                      0.3330       

    then  LDo              = arc hav [ n + ( 1 - q ) * hav (RBA) =  52deg 2.55'

    I have never tried Ageton, but may do some comparisons in the next few months,if I find time.(I find semi reitirement very busy!). I shall compare calculator, Fuller slide rule, BN, Hv Doniol and probably now Ageton.

    All good fun.

    Really miss Hanno in these fascinating discussions.

    Best wishes all,


    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