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: Calibrating a sextant scale
    From: Richard M Pisko
    Date: 2007 Nov 25, 23:37 -0700

    On Sat, 24 Nov 2007 09:25:33 -0700, Alexandre E Eremenko  
    > No degrees anywhere. It was simply called
    > "one angular division" or
    > "one thouthands" in literal translation from Russian.
    Similar to the USA: the "mil" is supposed to be an approximation of one  
    thousandths of a radian.  Actually, I think the French used the 1/6400  
    division in the late 19th century, and the USA borrowed it.  At least I  
    saw a French box compass with a translation descibing the units that way  
    some time ago.  It wasn't immediately obvious from the picture, because it  
    followed the points of the compass quite well, but was not the grad/gon  
    > The rule was that you see an object of size 1 meter
    > at 1 kilometer distance under the angle
    > "one division"=1/6000 part of the circle.
    > That is they assumed that pi=3 for mental calculations.
    > ("The Device", of course performed calculations exactly).
    How would that angular division of "one thousandths" be pronounced in  
    Russian?  I would have to see it as spelled phonetically by an English  
    speaker, unfortunately.  The US "mil" sounds just like "mill" in "Down by  
    the old, mill, stream."
    > The airforce and navy used degrees, so there were
    > communication problems when any interaction was required:-)
    Glad to hear interservice miscommunication is international.  :-)
    Taske care,
    Richard . . .
    Using Opera 9.2.4 after the "Dog" died
    To post to this group, send email to NavList@fer3.com
    To unsubscribe, send email to NavList-unsubscribe@fer3.com

    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