As one who worked without SSR and who now gives handovers to Tower Ranger..the answer to the question "how busy must these places be?" the answer is not so much how much traffic ..but more retaining the ident ...proving seperation.. keeping a very good mental picture and always keeping your strip display up to date...and I agree with the FL390 comment.Thank goodness for SSR ...never mind TR ..p'raps there will be a few pesetas...sorry euro's left in the pot after they get the "travelling folk" in to lay some tarmac