Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    Re: Tides by bearing of the moon
    From: Brad Morris
    Date: 2009 Apr 7, 09:35 -0400

    I found it as well in Bowditch, 1849.  Being the curious type, I went through 
    the exercise of calculating the time of high tide for my location.  Needless 
    to say, it did not yield a correct answer.  I recall that it was off by 
    hours.  Not even close to a correct answer.
    This is probably the reason it was dropped.  Just useless in practice.
    Best Regards
    -----Original Message-----
    From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Wolfgang K�berer
    Sent: Tuesday, April 07, 2009 2:04 AM
    To: NavList@fer3.com
    Subject: [NavList 7864] AW: [NavList 7862] Tides by bearing of the moon
    This is the oldest method of determining the time of High (and Low) Tide; it
    was in use at least since the 15th century. One can find descriptions in the
    "Quatri Partitu" of Alonso de Chaves (ca. 1545) and in English in two
    versions of Chaucer's treatise on the astrolabe (which may be later
    additions), not to forget the French booklets by Guillaume Brouscon. A table
    giving the moon's bearings for the main ports at high and low tide was
    included in practically every textbook on navigation well into the 19th
    If you want to read more about it, see: Howse, Some Early Tidal Diagrams,
    in: Mariner's Mirror, Vol. 79 (1993), 27 - 43. The booklets by Brouscon are
    dealt with by Dujardin - Troadec, Les Cartographes Bretons du Conquet. La
    Navigation en Images 1543 - 1650, Brest 1966.
    Regards, Wolfgang
    "Confidentiality and Privilege Notice
    The information transmitted by this electronic mail (and any attachments) is 
    being sent by or on behalf of Tactronics; it is intended for the exclusive 
    use of the addressee named above and may constitute information that is 
    privileged or confidential or otherwise legally exempt from disclosure. If 
    you are not the addressee or an employee or agent responsible for delivering 
    this message to same, you are not authorized to retain, read, copy or 
    disseminate this electronic mail (or any attachments) or any part thereof. If 
    you have received this electronic mail (and any attachments) in error, please 
    call us immediately and send written confirmation that same has been deleted 
    from your system. Thank you."
    Navigation List archive: www.fer3.com/arc
    To post, email NavList@fer3.com
    To unsubscribe, email NavList-unsubscribe@fer3.com

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    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 Settings

    Posting Code:

    Custom Index

    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