The secret code transmitted by the San Jose Semaphore has had mathematicians and puzzle fans stumped for over four-and-a-half years, but Jimmy Waters, a high school math teacher from Knoxville, Tennessee, just solved the mystery. The SJ Semaphore’s hidden message was one of the most famous broadcasts of all time — Neil Armstrong’s first words as he walked on the moon.
https://blogs.adobe.com/conversations/2017/03/tennessee-teacher-cracks-adobes-semaphore-code.html
