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
    Sight Reduction Formula Question
    From: FS
    Date: 2005 Jan 7, 07:24 -0800

    In _Celestial for the Cruising Navigator_ by Merle
    Turner, the navigational triangle azimuth formula is
    given as:
    
    cos Z = (sin d - (sin L * sin H ))/(cos L * cos H)
    
    but Dutton's Navigation and Piloting gives the much
    simpler:
    
    sin Z = ( cos d * sin t ) / cos H
    
    They both seem to work.  But there must be some reason
     that the longer one is better, right? Works in more
    cases?  My goal is simplicity, using a basic
    scientific calculator.
    
    Thank you in advance for any help, Great Wizards.  The
    space navigation stuff is fascinating, albeit "over my
    head"!
    
    
    
    
    __________________________________
    Do you Yahoo!?
    Yahoo! Mail - now with 250MB free storage. Learn more.
    http://info.mail.yahoo.com/mail_250
    
    
    

       
    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