Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    Re: "Dalton Dead Reckoning Computor" Type E-6B
    From: David Pike
    Date: 2016 Feb 19, 14:34 -0800

    Gary said:  You can use theE6B on your boat for time speed distance and correction for current just divide by 10.

    And if you’ve got a scrap outer you no longer need, you can use typists whiteout to obliterate 360, 030, 060 etc and write in the hours 12, 1, 2 etc (or 12, 11, 10).  Then, if you use the squared bit of the slide marked with the tidal range, and assuming a sinusoidal tidal height pattern, you can use it like ‘tide poles’ to work out the height of the tide at any time in the next few hours.  Swing the face until the time of high water is at the top against zero drift; place the ‘mean level’ under the dot; and mark half the ‘range’ on the face in pencil above the dot.  Swing the face to the required time to get the height of tide.  However, this does rather muck up the front of the Douglas for anything else, so only modify a scrap one in case you decide to take up flying again. The white stuff takes a lot of rubbing off. DaveP   

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    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 Settings

    Posting Code:

    Custom Index

    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