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
    or...
       
    Reply
    Re: Plotting Tools?
    From: David Pike
    Date: 2019 Apr 5, 14:48 -0700

    Maybe this Russian divider is also for the same purpose, although I can't read the Russian explanation on the cover. Best regards Juergen 

    The table in picture 2 is simple ratios. Left is for lines, middle is for areas, right is for volumes.  E.g.  1:1 is the same for all three.  With the pivot in the middle the marker ought to be found against 130.  For 1:2 for lines the pivot should be 1/3 from one end.  The points at the long end will be twice the distance apart than those at the short end.  For areas the pivot will be nearer the centre, because the longer end points only need to be 1.42 (root 2) times the distance apart of the smaller end points.  For volumes, the pivot would be even nearer the centre because the wider points would only need to be 1.26 (cube root 2) times the distance apart of the smaller end points.  E.g.  If you want to double the volume of a square cube, you only need to increase the length each edge by 1.26.  Understanding the table in photo 4 is beyond my pay grade, except to say n=6 corresponds to pivot in the middle.  DaveP

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    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:

    Email Settings

    Posting 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