What does hydrography measure besides the physical features?

Hydrography encompasses not only the measurement of physical features of bodies of water, such as depth, tides, and currents, but also involves understanding how these features can change over time. This aspect is critical in predicting maritime and environmental conditions, which is essential for navigation, environmental management, and coastal planning. By measuring these factors and analyzing data over time, hydrographers can make informed predictions about how certain conditions may evolve, allowing for proactive measures to be put in place.

Other options, while relevant to aspects of marine or waterway management, do not fall under the primary domain of hydrography. For instance, the ecological impact of dams pertains more to environmental studies rather than hydrographic measurements, the construction of marine vessels is related to engineering and design rather than measuring water features, and the regulation of fisheries involves legal and biological considerations rather than the direct measurement and analysis core to hydrography.