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: mechanical chronometers
    From: Alexandre Eremenko
    Date: 2006 May 15, 20:18 -0500

    To get an idea of what a chronometer is,
    go to e-bay and type "marine chronometer"
    in search. Ignore all wristwatches that are
    called chronometers: they just usurped the name:-)
    Also ignore "ships clocks" and "deck clocks" which are
    sometimes listed in this category.
    It is a clock, suspended on gimballs
    ("Cardan suspension") in a wooden box.
    Approximately 10 by 10 by 10 inches.
    The design almost did not change since the middle of XIX century.
    The average chronometer "goes" about a second per day,
    and the best ones about 0.2 of a second.
    "Going" of a chronometer is the technical term which describes
    non-uniformity of its rate.


    On Mon, 15 May 2006, Red wrote:

    > Geoffrey-
    >  "It must be understood that a chronometer is not a "clock"."
    > I'm afraid I only know the modern use of the term, i.e. that a wristwatch having
    > passed certain ratings is now "certified" as a chronometer, as Rolex does. Can
    > you tell me what makes a chronometer not just a clock, in the larger sense? And
    > what accuracy you expect from a true chronometer?
    > >

    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