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Offline ColinTTopic starter
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« on: March 02, 2011, 11:23:30 am »
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Can someone tell me if objects detected on the beach and within the surf line tend to move with the tide or currents?  I am asking this because I wanted to know the value of recording a gps position if stuff is subject to movement?  Thanks   ColinT

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Offline Homefire
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« Reply #1 on: March 02, 2011, 12:25:15 pm »
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I think this was pretty much covered in your other post.

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« Reply #2 on: March 06, 2011, 06:06:26 am »
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 This is a very interesting question.  Has any study been done to itemize the exact locations of ships gone down or wrecked off the N. C. coast and how far out they may have been at the time.  If testimony from crew states they had a certain light house in sight....or even "light ships" or boats going up and down the intercoastal channels.....and if we know the height of the light house, and the approximate height from water of the deck from the ship....is it possible to more exactly pin point the location of the capsized wreck?  The length of travel of an object on the floor of the ocean would, it seems to me, depend on how rough the current was...say in a hurricane.  There are also currents, depending on the structure of the sea bottom, that would tend to push the objects further out to sea, particularly following a hurricane.  The question arises as to when is the best time to hit the beaches for possible finds....is it immediately following a hurricane?  Then, if so, it would be important to know where "the closest" ships went down from the beach.  The other interesting parameter would have to consider the "lateral" displacement of objects on the sea floor.  Let us say that we find a coin on the beach that is definitely tagged to a wrecked ship that is miles to the left or right of our find....and if we know the number of "severe" hurricanes that have hit the area....can we not then grossly approximate the lateral influence a single hurricane can have on movement of the object.  It would be a wild guess...so what.  I think the biggest problem would be the amount of sand and debri that has accumulated on top of the objects.  What forces come to bare on moving this sand?  Hurricanes?  A very interesting topic....

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