Tidal Datums

Tidal datums are reference points based on the average or extreme levels of ocean tides, used to measure and compare water heights at a specific location. They provide a standard for navigation, construction, and flood risk assessment by defining benchmarks such as mean low water or mean higher high water. These datums help scientists and engineers understand variations in sea levels over time and ensure devices like boats, buoys, and flood barriers are accurately positioned relative to the water’s typical range. Essentially, they serve as a consistent "zero point" in tidal measurement systems.