Roger W. Pratt was formerly a Senior Lecturer in the Department of Aeronautical and Automotive Engineering, Loughborough University, UK and is now with Ricardo MTC Ltd, Leamington Spa, UK. He is a member of the IEE and a UK Member for AIAA's Technical Committee on Guidance, Navigation & Control. His team of contributors includes engineers from British Aerospace, DaimlerChrysler Aerospace, Boeing, Smiths Industries and Cambridge Control as well as research institutions in the UK and Germany.