Chapter 4, page 7.
4.7 4.1 Representing the ocean tides.
4.2 Two ways of explaining the ocean tides.
4.3 Values of attraction.
4.4 The direction of the tide waves.
4.5 The continents and the flowing of the tide waves.
4.6 Number of the tide waves.
4.7 Tide waves and sublunar points.
4.8 The physical equation for the ocean tides.
4.9 When Earth, Moon and Sun are aligned.
4.10 Tide cadences.
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#10 - Tide waves and sublunar points.
.1

(current approach) ... the two bulges (tide waves) tend to keep themselves in the same relation with the position of the Moon.
.2 (inductive approach) The tide waves develop within a basin, independently from what occurs in the other basins.
.3 The tide waves have a direct relation with the passage of the Moon on the meridian only on a limited section of each basin, as one can see on the film made by NASA.
.4 The same occurs in the case of semi-diurnal basins, when the passage of the Moon takes place above the opposite meridian.
fig.
1
.5

In the eastern basin of the North Atlantic, where tides occur twice a day, the cotidal lines (in red) show roughly the average delay given in hours of the first tide after the passage of the moon on the meridian, as well the average delay of the second tide after the passage of the moon above the opposite meridian.
.6
The time difference between the tide wave, and the passage of the Moon on the meridian (or on the opposing one in the case of a semidiurnal basin), is witnessed by the locution used by sailors “lunitidal interval”, which stands as an implicit denial of the theory of the sublunar points.
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