Isobath is a term that refers to a contour line that connects points having the same depth below a body of water's surface. Some of the synonyms for isobath include depth contour, bathymetric contour, and depth curve. The term bathymetry refers to the measurement of the ocean's depth, and isobaths play an important role in this process. Isobaths are also used in marine navigation, particularly in the creation of nautical charts. Other synonyms for isobath include seafloor contour, submarine contour, and oceanic depth line. Overall, isobaths and their synonyms play a crucial role in marine science and navigation, helping us understand and explore the depths of the world's oceans.