- Roadmap to Resources
- Tutorial PDF
- Subject Review
- Video - Storm Surge
- Tides and Currents (audio podcast)
- What are Tides?
- What Causes Tides?
- Gravity, Inertia, and Bulges
- Changing Angles and Tides
- The Frequency of Tides
- Tidal Variations
- Types and Causes of Tidal Cycles
- What Else Affects Tides?
- Monitoring the Tides
- Old System
- New System
How are Tides Measured?
Tides and Water Levels
Maritime activities throughout the world depend on accurate tidal and current information for safe operation. NOAA's National Ocean Service collects, studies and provides access to thousands of historical and real-time observations as well as predictions of water levels, coastal currents and other data.
The Tides and Waters Levels Tutorial is an overview of the complex systems that govern the
movement of tides and water levels.
The Roadmap to Resources complements the information in the tutorial by directing you to additional information and data from NOAA and other reliable resources.
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