411A there's all sorts of things in aviation that you can look up in a book BUT when you're bouncing around in a single/twin piston in the dark trying to do the Coconut 3 STAR into a VORDME/ILS to 22R or whatever your workload will be increased to breaking point if you've got to read those little dots and dashes on your cluttered chart. I've watched trainees with finger trouble set up the wrong beacon and, although they knew the coding was wrong, they couldn't fault analyse the situation because they couldn't relate what they were hearing to another beacon. Even though there's no ground exam in Morse in JAA anymore I'd strongly advise people to get some working knowledge of Morse.