Effect of Change in Moons Declination

When the moon is on the equator the two successive high tides are of nearly the same height. When the moon is north or south of the equator the two differ in height, as is shown in Fig. 82. At point B under the moon it is high water, and the depth is greater than the average. At B\ where it will again be high water about i2h later, the depth is less than the average. This is known as the diurnal inequality. At the points E and Q, on the equator, the two tides are equal.

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