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
    Index Card for Trig/Log Table
    From: Greg Rudzinski
    Date: 2009 Sep 8, 13:22 -0700

    An index card is handy when performing sight reduction with a trig/log table. 
    I set my card up with pre computed entries that are good for a few hours of 
    Sun celestial. The highlighted portions of the attached index card photos 
    show what can be pre calculated before an observation is performed. The 
    remaining computations can be performed at a leisurely pace in less than four 
    minutes. The result is accurate to four places even when the the SIN product 
    is calculated by slide rule. I like the trig/log tables because they are 
    compact enough to fit into my sextant case along with a K&E 4070-3 slide rule 
    .  
    
    
          
    --~--~---------~--~----~------------~-------~--~----~
    NavList message boards: www.fer3.com/arc
    Or post by email to: NavList@fer3.com
    To , email NavList-@fer3.com
    -~----------~----~----~----~------~----~------~--~---
    
    

    File:


    File:


       
    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