What's the name given to lines of equal underwater depth on maps?
Underwater topography Bathymetric survey Palaeobathymetry Isobath Bathymetric Depth contour Paleobathymetry Bathymetry Bathymetric Survey
depth contour underwater topography paleobathymetry isobath bathymetric survey palaeobathymetry bathymetric bathymetry
isobath
WikipediaEntity
Isobath