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: Lunars: how to use the prop.log tables?
    From: David Pike
    Date: 2016 Sep 2, 00:44 -0700

    Oops!  I the cold light of day I spot a slight mix up in the As and Ts.  The sentence in my last message should have read:

    If T1/A1 = T2/A2, then A2/T2 = A1/T1, so A2 = (A1 x T2)/T1, and log A2 = (logA1 + logT2) - logT1, or in 1820s parlance, the log of the fourth term is equal to the log of the second term plus the log of the third term minus the log of the first term. DaveP

       
    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