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Today we can show the way our newly designed Blindlanding simulator device does operate. The L - R (left-right) indicator type AFN 1 is appropriately responding upon the long range beacon dot-and-dash signals. The dots are indicating that the aircraft is on the left off the virtual (landing) beacon centre; whilst dashes indicate off to the right of it. When the aircraft system is just receiving L-R signals of equal strength an uninterrupted tone (1150 Hz) being noticed; and the indicator pointer stays just at its centre marker. This phenomenon can be accomplished entirely acoustically; so that a pilot did not need to read off the L-R indicator instrument permanently. A dot constitutes a pulse length of 1/8s and the dash is lasting 7/8s; 7/8s +1/8s representing just one second. In the days of the Lorenz Blind-landing system, timing was accomplished by means of mechanical switches, whereas we are relying on electronic circuits.