# How is the tide calculated?

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### How is the tide calculated?

Let’s take an example: D-day: 1:47 p.m. = low sea of 0.70m and at 7:30 p.m. = high sea of 5.93m. Then divide by 6 to get the hour-**tide**i.e.: * 343 / 6 = approximately 57 minutes.

### What are the tidal coefficients?

A **tide** of **coefficient** greater than 70 **is** qualified **tidal** spring tides. A **tide** of **coefficient** less than 70 **is** qualified **tidal** neap tides. A **tide** of **coefficient** 95 **is** a **tide** medium spring tides. A **tide** of **coefficient** 45 **is** a **tide** average neap waters.

### When does the sea rise?

Some scientists warn us. According to them, the level of **seas** and oceans could rise one to three meters by 2100 due to ongoing global warming. The melting of continental glaciers and the thermal expansion of the oceans are the two main contributors to this rise.

### What is Tidal Calculation?

Tide calculation. The tide calculation is the method used in maritime navigation to estimate the height of water, in a place and at a given time, from the tide predictions made by the hydrographic services for reference points, and recorded in directories. .

### What are the tidal coefficients?

The tidal coefficients The tidal coefficients vary between . A tidal coefficient close to 20 corresponds to a small tide: the difference in water level between low tide (BM) and high tide (PM) is low. On the contrary, a coefficient close to 120 corresponds to high tides.

https://www.youtube.com/watch?v=Lba6nnWrsII

### What are tidal heights?

The tide heights are indicated in France in relation to the hydrographic zero which is close to the lowest level that the sea can theoretically reach, i.e. the sea level at the time of low tide of a tide of coefficient 120 (coefficient of highest tide).

### How to define a tide?

A tide, in a given place and on a given date, is defined by: its tidal range, ie the difference in water height between high tide and low tide expressed in meters; high tide time (abbreviated as PM) and low tide time (abbreviated as BM). The tidal coefficient