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3. What are tides?

What are tides?

A tide is the periodic rise and fall of the water of oceans, seas, bays and so on caused by the gravitational interactions between the earth, moon and sun (Australian Hydrographic Service glossary).

• What makes the tides.
• History of tidal analysis and prediction.
• Tide predicting machines.
• How do you measure water levels.
• Why do you measure water levels.
• The challenge of measuring water currents.

• An explanation of tidal terminology.

• Tidal glossary – an explanation of tidal terminology.

• Tidal research and predictions.