LADIES AND GENTLEMEN,—As you know, this is the first lecture of our 1948 49 Session—a series which I am sure you will find both interesting and instructive It is also the first time we have been privileged to use this room for our Meetings and our thanks are due to the President and Council of the Royal Aeronautical Society for granting us this facility

Our lecturer today has chosen a subject which is becoming of very great importance now that Helicopters are being used in a definite operational sense Mr USHER IS peculiarly well suited to talk to us on “Navigational Aids to the Helicopter” as he is qualified as a R A F Advanced Specialist Navigator, and has some experience of Helicopter Pilotage He is a Fellow of the Royal Meteorological Society and an Associate of the R Ae Society and, needless to say, a Member of our Association and also holds the Bachelor of Science Degree and Diploma of Education—both of London