When I was invited to address this distinguished gathering on the subject of All-Weather Operations it was with some trepidation that I accepted. It always strikes me that, to an audience the majority of whose members are not directly involved in furthering the cause of bad weather landing, yet another progress report on this topic must sound rather like the Continuing Story of Peyton Place—a complex intrigue of interwoven plots with little defined end result. I personally do not believe that the situation is really as depressing as this, and my task is to try and convince you that this is so, hopefully, by presenting objectives and achievements in simple terms. I will try (not completely successfully I fear) to avoid the plethora of jargon that the international civil aviation fraternity has necessarily had to employ in its complex debate and arguments. If, as a result, I can be accused of oversimplification, I apologise to the experts, and only hope that it is of genuine assistance to the non-experts.