ALEXANDRIA, Va., March 26 -- United States Patent no. 12,259,467, issued on March 25, was assigned to ATLANTIC INERTIAL SYSTEMS Ltd. (Plymouth, Great Britain).
"Terrain referenced navigation system" was invented by Andrew Price (Plympton, Great Britain) and Geoffrey Henderson (Yelverton, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "A terrain referenced navigation system includes a one sensor arranged to measure the elevation of terrain below a current position of the navigation system, a terrain elevation map comprising a plurality of map posts that each comprise terrain elevation data, and a land-water detection unit arranged to calculate a proportion of land/or water of at least a portion o...