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: Question on currents and waves
    From: John Huth
    Date: 2009 Dec 18, 10:48 -0500
    Jeremy - 

    I, too, have been hammered by steep faced waves in current - not saying that you have to solve equations to appreciate it.   I'm just trying to understand the quotes I appended from underlying principles.

    Some of us actually like to "play" in tidal overfalls.   Near Anglesea (sp?) Wales, there's a very popular spot for us sea kayakers and like the wind-against-current conditions.   Of course, we're a bit crazy.

    On Fri, Dec 18, 2009 at 9:57 AM, <anabasis75---.com> wrote:
    Frank wrote:
     
    Here's an article that explores the refraction idea a little further:
    http://fer3.com/x.aspx/waves
    (links to the page at Ocean Navigator). This author also adds something that I didn't know which is that the NOAA offshore forecast -routinely- refers to higher waves in the Gulf Stream when the wind is out of the north. This author makes a pretty good case that waves travelling opposed to a current are focused by the gradient in velocity along the current boundary. I would love to see some calculational confirmation nevertheless.
     
    ---------------------------------
     
    I have no need for calculations of this.  I was heading up the gulf stream off the coast of Florida heading to Cape Canaveral on an empty ship.  The wind was from the north and the waves started getting VERY steep.  I started pounding so badly I had to cut my speed in half and still managed to snap the running light off of the foremast.  We ended up 2 hours late for arrival.
     
    Also, when you approach the gulf stream, you can certainly tell the boundary by both water color and by wave action at the interface.  I won't attempt to quantify it however.
     
    Jeremy

    --
    NavList message boards: www.fer3.com/arc
    Or post by email to: NavList@fer3.com
    To unsubscribe, email NavList+unsubscribe@fer3.com

    --
    NavList message boards: www.fer3.com/arc
    Or post by email to: NavList@fer3.com
    To unsubscribe, email NavList+unsubscribe@fer3.com
       
    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