Okay, I'm up for it. . .. .I've never seen it in use in the UK at all. Can't speak for the rest of EUR.. .. .I believe that it is in widespread use in the USA, and I seem to recall that it was in use at Guam (Pacific) when a KAL B747(?) was attempting a ILS (NO GP) and got the altitudes wrong with fatal results I'm sorry to say.. .. .Any one else?. .. .rgds BEX