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Go Back   SailNet Community > General Interest > General Discussion (sailing related)
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  #1  
Old 08-13-2012
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Reading the tides

My sailboat lives in a marina inside dock with a constant south wind. Here is a local tide table. I want to put my boat in the marina today at lunch. How can I tell when the tide will stop running? Is it like 30 min or an hour on either side of the daily prediction? Not sure how to tell when it will be still. any advise on this?
Tides for Beaufort starting with August 12, 2012.

Day High Tide Height
/Low Time Feet


M 13 Low 12:15 AM 1.4
13 High 6:25 AM 6.5
13 Low 12:21 PM 0.8
13 High 6:52 PM 7.7

T
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Old 08-13-2012
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Re: Reading the tides

Local tidal currents may be out of phase with predicted tide charts, but slack tidal current will extend either side of predicted high and low about one hour.

This is were you need local knowledge, at times slack may only last a few minutes, the larger the tidal range the greater potential for reduced slack time..
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Old 08-13-2012
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Re: Reading the tides

Tides and currents are not always the same. Takes a bit to imagine it, but it's true in many cases.

Imagine draining a tub, when its just about empty put in the drain plug and turn on the tap, the water will continue to travel for a few seconds towards the drain then get all confused before things reverse.

Now imagine a bathtub the size of your body of water. Now imagine the Atlantic Ocean and/or a river fighting to drain in or out.

Go to your local chandlery and thumb through a copy of Eldridges. If it cover your area, and I'm guessing it will, it will be a wise investment.
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Re: Reading the tides

Well thanks for the help. I was able to get her back into her slip. I bounced a little off the starboard side. Not bad. I was there right at the tide listed above at 12:21 It had already started to turn and come back in. The problem is that a tide puts a stern flow under the keel. Thatís why I hit it. So Next time I will plan 45: to an hour before the predicted outgoing. That will keep me some steerage and help stop the inertia. Thanks for your help. It is a tough thing and a challenge to be a sing hander type.
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Re: Reading the tides

Rainflow changes tides

Wind also
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