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: L'Hermione en route to America next summer
    From: Jackson McDonald
    Date: 2014 Nov 25, 16:02 +0000
    Monsieur,

    You wrote:  By the way, a contribution will be published about Hermione and Latouche navigation in "Navigation" IFN (Institut Francais de Navigation), N°246, T1 2015.

    Please share this article with NavList when it is published.  

    En vous remerciant d'avance,

    JMcDonald


    From: NoReply_Robin-Jouan@fer3.com
    To: jacksonmcdonald---.com
    Date: Sat, 22 Nov 2014 10:16:03 -0800
    Subject: [NavList] Re: L'Hermione en route to America next summer

    In France, Lunar Distance method is said to have been introduced on 1759, using a graphical pattern invented by Abbe Lacaille.
    I know that J-J. de Lalande described Lunar Distance method and Maskelyne table use in Connaissance_des_Temps of 1774.
    Moreover, in France, marine chronometers of Le Roy then of Berthou were qualified through the scientific voyages of Aurore, Isis and Flore frigates (before 1772).
    Nethertheless on 1780, Captain de Latouche did not used Lunar distances for Hermione Atlantic crossing. Indeed, neither Lunar Distances, nor marine chronometers !
    Captain de Latouche used only dead reckoning and sun meridian latitude. At last, he knew that his longitude was false (due to a problem with his loch or log) and he maintained the latitude of Boston bay during several days. His longitude error was 295 NM when arriving at Cape Ann !
    It was much better during the Hermione return voyage on 1782.
    By the way, a contribution will be published about Hermione and Latouche navigation in "Navigation" IFN (Institut Francais de Navigation), N°246, T1 2015.
    As for me, I proposed to new-Hermione French Association to do some celestial navigation on-board. But I was not accepted (because too much old !).
    New-Hermione has every modern navigation instruments on board. No doubt about that.
    Yves Robin-Jouan
     
     
     
    View and reply to this message
       
    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