(Territorial Sea Fn GEO_ENTITY) picks out the region of the sea designated as the territorial sea of GEO_ENTITY, in accordance with U.N provisions. An entity's [see political entity] territorial sea must be adjacent to its coastline, and cannot be more than 12 nautical miles wide (as of the late 20th Century). The territorial sea of an entity is not included as part of that entity's actual area.