Tide graph display
The tides refer to the periodic rise and fall of water in oceans, seas, bays and other bodies of water. This is caused mainly by the gravitation between earth, the moon and the sun. The tides rise and fall approximately every six hours. The tide graph shows the movement of the tides based on the course of the moon over a meridian and the lunitidal interval.
The watch can show the low and high tide phases for any given location or date. This can be quite useful, for example if you want to know the patterns of the tides at your destination in advance.