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: telegraphic longitude article
    From: Jan Kalivoda
    Date: 2003 Dec 27, 12:44 +0100

    If I understood George Huxtable well, both places A and B worked with time 
    pulses sent through the line only by the chronometer in A and marked their 
    meridian passages against A-pulses (obtained by telegraph in B). The shift of 
    the time of a meridian passage of the same star from A to B against A-pulses 
    gave the longitude difference between A and B without any need of knowing the 
    real signal delay in the wire.
    
    After the accurate longitude difference of B to Greenwich (or any other place 
    A) had been known, one could compare his chronometers in B with the time in A 
    by meridian passages at B without blocking the telegraph line.
    
    Thank you, George.
    
    
    Jan Kalivoda
    
    
    

       
    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