Locations on earth's surface. TIDES are periodic primarily because of the cyclical influence of the Sarah's rotation.
The timing of tidal events is related to the earth' s rotation and the revolution of the moon around the earth. If the moon was stationary in space, the tidal cycle would be 24 hours long. However the moon is in motion revolving around the earth.
One revolution takes about 27 days and adds about 50 minutes to the tidal cycle. So as a result the tidal period is 24 hours and 50 minutes in length.
The pull exerted by moon and to a lesser extent by the sun causes water to pile up on diametrically opposites sides of the globe the earth and the sun acting in conjunction causing exceptionally high
And low TIDES as the earth rotates each meridian must be in the positions twice in a day. The moon is moving orbit in the direction of the earth's
rotation so that the two high and two low TIDES are experienced in the lunar day 24 hours 52 minutes.
The force of moon and sun pulling at right angles causes little difference between the height of high and low TIDES.
The tidal range is small in open ocean.......