On 17 Sep 2014 at 17:51, Chris Bowne wrote: > Walt, KJ4KV did an excellent ER in Uniform article on the ARR-1/ARR-2 navigation > system many years ago. Perhaps someone can provide what issue it was in. July 1990, Issue 15, Page 4. Walt Hutchens, "ARR-1 and ARR-2" Ken W7EKB