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: Mid XIX century Nav
    From: Alexandre Eremenko
    Date: 2005 Nov 14, 22:19 -0500

    Meridian observations
    (with a meridian circle or teodolite)
    need a firm base. But what about time
    sights?
    
    Alex.
    
    On Mon, 14 Nov 2005, Fred Hebard wrote:
    
    > Alex,
    >
    > I would expect they wanted to do some time sights to rate the
    > chronometers.  In addition, (although I'm less sure on this) they may
    > have done some transits to find absolute time.
    >
    > There's a great account of repairing cables in the late 19th century
    > where the fellows go ashore to rate their chronometers.  I can't
    > recall the name nor find the book, but it was mentioned here a few
    > years ago.
    >
    > Fred
    >
    > On Nov 14, 2005, at 7:36 PM, Alexandre E Eremenko wrote:
    >
    > > I am reading a book by a famous Russian XiX century
    > > author, Goncharov, on his voyage to Japan in 1853/4.
    > >
    > > (The Russians were trying to "open" Japan for trade
    > > at that time, the same thing did the Americans (at exactly the same
    > > time).
    > > Japan was "closed to foreigners"; no one could land
    > > etc. I don't want to describe all details.
    > > Anyway, the Russians were negotiating with the Japanese
    > > authorities for a permission to land. The following episode
    > > in this long and complicated negotiation, which lasted several
    > > months, attracted my attention. The Russians asked for a
    > > permission to land on some rock between their ship place
    > > and the land. Apparently a small uninhabited island.
    > > The reason they clamed for this permission was the
    > > "Necessity to check chronometers".
    > > Apparently they thought that this was a good reason
    > > for landing on a rock).
    > >
    > > Unfortunately the author of the book was not interested
    > > in navigation and did not want to explain to the readers
    > > this point. WHY did the Russians think that this was a
    > > legitimate reason?
    > >
    > > Why exactly did they need land to check their chronometers?
    > > Or, more precisely, why did they think that "checking chronometers"
    > > is a legitimate reason for a landing?
    > >
    > > What was the proper procedure of "checking chronometers" they had
    > > in mind?
    > > Was this by the Lunars?
    > > Did they mean that a firm ground
    > > is needed for the Lunars? Or Jupiter satellites? to install a powerful
    > > telescope?
    > >
    > > (They were at ancor in the Nagasaki harbor at that time. Nagasaki
    > > was one of the few cities where foreigners were permitted to stay
    > > on ancor
    > > at that time). To finish this part of the story I just say that
    > > they were
    > > not permitted. The Japanese quickly built some structure on the rock,
    > > as an evidence that this rock was "land", rather than some "rock in
    > > the
    > > sea"
    > > or "uninhabited (and unclaimed?) island" where anyone can land. Before
    > > arriving
    > > to Nagasaki, the Russians signed the paper that they will not land
    > > without
    > > the permission of the authorities.)
    > >
    > > But I only wanted to discuss the CelNav part of the story.
    > > Why did the Russians think that "checking chronometers" was a
    > > legitimate
    > > purpose of landing on a rock?
    > >
    > > Alex.
    > >
    > > P.S. I am well aware that the first underwater transoceanic cable
    > > layings
    > > were made at about the same time. So the Lunars were doomed,
    > > already then,
    > > even as a
    > > mean
    > > of checking chronometers:-(
    >
    
    
    

       
    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