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: Jack Aubrey's fixing of longitude
    From: Michael Dorl
    Date: 2011 Jun 19, 11:01 -0500

    > Yes perhaps, but from the description of, "the moon, with Venus clear
    > above her," it sounds as though Venus was conjunct the moon - or very
    > nearly so. So what does the measurement, "Two seven four," signify?
    >
    > It might have been an occultation of Venus. As the Surprise was at a
    > latitude of about 15 degrees South at the time, the moon may well
    > appear to be travelling vertically up to an occultation with Venus.
    > But again, what does the measurement, "Two seven four," signify?
    
    What year are we talking about?
    
    There was a venus occultation 12 april 1785.
    
    1805 would be a better year; Lewis & Clark tried to establish longitude
    from a lunar eclipse that year Jan 14/15.
    
    
    
    
    

       
    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