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
    DR Plotting
    From: Lu Abel
    Date: 2009 Aug 04, 16:29 -0700

    Does anyone know when constant plotting of courses and dead reckoning
    positions became commonplace in near-shore navigation?
    
    I have both 1914 and 1925 editions of Bowditch.    Both contain lots of
    information about fixing position, not only by bearings and running
    fixes, but by vertical angles, circles of position, bow-and-beam
    bearings, etc -- but nothing about keeping a DR plot.   The nearest they
    have to DR positioning is comments on "adding up courses run" to get an
    estimate of position -- but it's pencil-and-paper calculations, not
    plotting the way Bowditch teaches today.
    
    I'm going to guess that the transition was made in the 1930s because I
    believe DR plotting was well established by the time of WW II.
    
    
    
    --~--~---------~--~----~------------~-------~--~----~
    NavList message boards: www.fer3.com/arc
    Or post by email to: NavList@fer3.com
    To unsubscribe, email NavList-unsubscribe@fer3.com
    -~----------~----~----~----~------~----~------~--~---
    
    

       
    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