What are tide gauges primarily used for?

Tide gauges are primarily used for monitoring and recording the variations in sea level caused by tides, as well as atmospheric conditions and other factors that influence water levels. Their main application is in port and harbor operations, where understanding tide levels is crucial for navigation, docking of vessels, and ensuring safety in maritime environments. Accurate tide data helps in forecasting tidal currents, determining safe anchorage spots, and planning operations based on the tidal cycles.

While tide gauges do provide valuable information that can be useful to various sectors, including land surveying and environmental monitoring, their primary focus within hydrographic surveying is indeed tied to their role in aiding port and harbor operations. The data collected from tide gauges supports decision-making processes related to shipping schedules, infrastructure development at maritime facilities, and enhancing overall operational safety in tidal waters.