Grid Letters
The area of Ireland is divided into 25 squares, measuring 100 km by 100 km, each identified by a single letter. The squares are numbered A to Z with I being omitted. 7 of the squares do not actually cover any land in Ireland - A, E, K, P, U, Y and Z.
Read more about this topic: Irish Grid Reference System
Famous quotes containing the word letters:
“When griefs are genuine, I find, there is nothing more vacuous, more burdensome, or even more impertinent, than letters of consolation.”
—Philip Dormer Stanhope, 4th Earl Chesterfield (1694–1773)