Tag Archives: #hydrography

Tides and Water Levels

Posted on September 10, 2023 by kelvin

Tides are the rise and fall of sea levels caused by gravitational forces exerted by the Moon and Sun, by Earth’s rotation and by centrifugal force caused by Earth’s progression around the Earth-Moon barycenter. Tidal range is the difference in height between high tide and low tide. Tidal range variation depends on time … Continue reading →

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Tidal Analysis & Predictions

Posted on August 15, 2023 by kelvin

Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon (and to a much lesser extent, the Sun) and are also caused by the  Earth and Moon orbiting one another. Tidal phenomena … Continue reading →

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Lighthouse Day – August 7th

Posted on August 7, 2023 by kelvin

Happy Lighthouse day! The main purpose of a lighthouse is as a navigation aid notifying mariners of dangerous shallows, rocky coast, and important locations by using bright lights and/or fog horns. The messages are simple: “STAY AWAY”, “DANGER”, “BEWARE!”, or … Continue reading →

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