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
    Re: Time Ball
    From: Gary LaPook
    Date: 2012 Sep 29, 22:28 -0700
    Note that the guy doing the explaining twice said that the time was based on Sidney's "latitude" when he should have said "longitude."

    gl

    --- On Sat, 9/29/12, Greg Rudzinski <gregrudzinski@yahoo.com> wrote:

    From: Greg Rudzinski <gregrudzinski@yahoo.com>
    Subject: [NavList] Time Ball
    To: NavList@fer3.com
    Date: Saturday, September 29, 2012, 8:17 PM

    See this YouTube video showing the historical Sydney Harbor time ball used for setting marine chronometers since 1858.

    http://www.youtube.com/watch?v=PMH4J9AtbXU&feature=related

    I'm not so sure being one second off in time would be enough error to endanger a vessel as the astronomer implies.


    Greg Rudzinski

    ----------------------------------------------------------------
    NavList message boards and member settings: www.fer3.com/NavList
    Members may optionally receive posts by email.
    To cancel email delivery, send a message to NoMail[at]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