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French Tide Coefficients


If you ever paddled in France and wondered how to interpret the tides shown in the local Tide Tables. They are shown by a number varying from number 20 to 120; a coefficient, which is a simple way of indicating the tide.

 

Coeff

English

French

120 – 

Springs MHWS

Vive eau exceptionnelle

95 – 

Springs

Vive-eau moyenne

70 – 

Average

Marée moyenne

45 – 

Neaps

Morte-eau moyenne

20 - 

Neaps MLWS 

Morte-eau exceptionelle


In the example below the biggest Spring tides on 21-23rd August are Coefficients of 108, 111 & 107. The smallest Neaps on 29 & 30th.



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