Loxodromic navigation
METHOD OF NAVIGATION BY FOLLOWING A RHUMB LINE, A CURVE ON THE SURFACE OF THE EARTH THAT FOLLOWS THE SAME ANGLE AT THE INTERSECTION WITH EACH MERIDIAN
Loxodromic navigation (from Greek λοξóς, oblique, and δρóμος, path) is a method of navigation by following a rhumb line, a curve on the surface of the Earth that follows the same angle at the intersection with each meridian. This serves to maintain a steady course in sailing.