The Rule of Twelfths

The Rule of Twelfths

The rule of twelfths is a rule of thumb for estimating the height of the tide at any time, given only the time and height of high and low water. This is important when navigating a boat or a ship in shallow water, and when launching and retrieving boats on slipways on a tidal shore. 

 
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Boston, 2016

“The Rule of Twelfths” project was realized with great support of Save the Harbor / Save the Bay, a non-profit public interest harbor advocacy organization, on Carson Beach.

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