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