What is the adjective used to describe measurements relating to the depths of oceans?

• A. Oceanographic
• B. Hydrographic
• C. Nautical
• D. Bathymetric

Answer: (D)

The focus here is on a precise term for depth-related measurements of the ocean floor. Bathymetric describes measurements of how deep the water is and what the seafloor looks like, forming from bathymetry, the study and mapping of underwater depths. This makes it the best fit for “measurements relating to the depths of oceans,” as you’d see in bathymetric charts or bathymetric surveys that chart depth contours and bottom topography. The other terms are broader: oceanographic covers broad ocean science topics; hydrographic relates to surveying water bodies for navigation and may include depth but isn’t limited to it; nautical is about ships and navigation.