What is the term for lines that connect points of equal water depth?

The term for lines that connect points of equal water depth is known as isobaths. These lines are used in bathymetric mapping and marine navigation to represent the underwater terrain, allowing users to understand the depth of water at various points. Isobaths help in visualizing the underwater landscape, which is crucial for activities such as fishing, boating, and underwater construction.

Isobars, on the other hand, refer to lines connecting points of equal atmospheric pressure, primarily used in meteorology. Contours are lines that connect points of equal elevation on land, typically found on topographic maps, indicating the shape and elevation of the terrain itself. Isochrones represent lines that connect points of equal travel time, often used in transportation and urban planning contexts. Each of these terms has a specific application and context, distinguishing them from isobaths, which specifically deal with water depth.