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: Gyro sextant
    From: Alexandre Eremenko
    Date: 2019 Jan 25, 20:11 +0000

    I want to mention two papers related to gyro-sextants.
    1. Mary R. Hunt, The German gyro-sextant, Inst of Navigation, June 1947, vol. 1, N 6 p. 138-141.
    The paper reports the results of testing in the US (two months after the VE 
    day) of these sextants found in German submarines.
    I cite the conclusions:
    "It appears to this writer, on the basis of these early tests, that the 
    instrument might have some usefulness as a
    supplement to the Endless Tangent Screw Sextant although it could not be 
    recommended to replace that instrument.
    One intriquing inference can be drawn from the existence of the gyro-sextant, 
    namely that the Germans must also have had difficulty in using the bubble 
    sextant for marine navigation!
    2. In 18th century (long before the invention of gyroscope!) some artificial 
    horizon called "marine top" was tested by John Serson on board of HMS 
    A complete description of this device was published in the Transactions of Royal Society:
    An Account of an Horizontal Top, Invented by Mr. Serson, by Mr. James Short, F. R. S.
    Authors: Mr. Serson and James Short
    Source: Philosophical Transactions (1683-1775), Vol. 47 (1751 - 1752), pp. 352-353.
    Apparently available free on JSTOR. I have not read it yet.
    This Serson died when HMS Victory sank in 1744 (Wikipedia has entries on Serson and HMS Victory).

    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