Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    Name or NavList Code:
    Email:
       
    Reply
    Re: HO 211 with Sadler method
    From: Gary LaPook
    Date: 2016 Jul 27, 02:55 -0700

    Back in December 2008 I made several posts comparing different methods of sight reduction. The sine-cosine method runs into problems with logs of negative trig values which is avoided with the haversine method. But it is suprising that it took until 2015 for Greg to find a way around this problem since other great minds had spent centuries working on the problem.

    http://fer3.com/arc/m2.aspx/Fw-Chichesters-Calculations-correction-LaPook-dec-2008-g6705

    http://fer3.com/arc/m2.aspx/Fw-Chichesters-Calculations-SineCosinemethod-LaPook-dec-2008-g6707

    http://fer3.com/arc/m2.aspx/Fw-Chichesters-Calculations-SineCosinemethod-LaPook-dec-2008-g6720

    http://fer3.com/arc/m2.aspx/Fw-Chichester-LaPook-dec-2008-g6721

    http://fer3.com/arc/m2.aspx/Fw-Chichesters-Calculations-SineCosinemethod-LaPook-dec-2008-g6744

    http://fer3.com/arc/m2.aspx/Fw-Chichesters-Calculations-SineCosinemethod-LaPook-dec-2008-g6745

    http://fer3.com/arc/m2.aspx/Fw-Chichesters-Calculations-comparisons-ofsight-reduction-LaPook-dec-2008-g6760

    http://fer3.com/arc/m2.aspx/Fw-Chichesters-Calculations-SineCosinemethod-LaPook-dec-2008-g6785

    gl

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

    Enter the email address associated with your NavList messages. Your NavList code will be emailed to you immediately.
    Email:

    Email Settings

    NavList ID Code:

    Custom Index

    Subject:
    Author:
    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