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: Longhand Sight Reduction
    From: Greg Rudzinski
    Date: 2014 Nov 12, 19:27 -0800


    Highlighting every other line horizontally might be worth a look.



    From: Hanno Ix
    Date: 2014 Nov 12, 19:09 -0800

    thank you for your comparisons.
    I think longhand sight reductions will probably never pass the Chichester test but would love to be proved wrong. As I see it, the real advantage of a minimized longhand sight reduction method is that it does not depend on a mechanical device that can, and probably will, fail. Even a ripped and wrinkled haversine table however will do the job and do so in short order.
    It seems you like the 2 arcmin format. You realize of course the same trick works for all trig functions. In the attachment there is such a table for sin() and cos(). It is actually older than the haversine table and was certainly not optimized for size of fonts. If you like I will implement the changes to the typography as suggested by Greg for the haversine table. But before I embark on this let me know if you - and Greg, you, too! - if there are other suggestions you might have.
    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