In a tidal gauge chart, what does the x-axis typically represent?

In a tidal gauge chart, the x-axis typically represents time. This is crucial because tidal measurements are fundamentally tied to the cyclical nature of tides, which change according to the gravitational influences of the moon and sun, as well as other environmental factors. By plotting time on the x-axis, the chart allows observers to understand how water levels change over specific periods, highlighting patterns such as high and low tides throughout daily or monthly cycles.

This time-based representation helps hydrographers and other marine professionals in predicting tidal behavior for navigation, coastal management, and operational planning. By correlating specific times with observed water levels, one can evaluate tidal ranges and establish tidal predictions for future planning.