Jane's Helicopter Markets and Systems is the most complete resource on the world's manned and unmanned helicopters and engines in use, in production, under development or being u graded, within both the civilian and military markets. Detailed aircraft listings provide impartial technical and production data enabling comparison and appraisal and ensure that you stay informed of important technological developments. Key intelligence and forecasts offer invaluable and informed market insights, together with a buyers' guide to available systems and equipment and their manufacturers. Key contents include: Helicopters in service, under development or research; upgrades and conversions; Helicopter engines; price guide; Unmanned helicopters; Helicopter-launched weapons; Civil and military census; Major helicopter operators; Buyers' guide A subscription to Jane's Helicopter Markets and Systems online gives you full search capabilities, a minimum of five-years archive and regular monthly updates. Visit http //jhms.janes.com to see the latest list of updates and browse the full contents listing. For a complete overview of the world's aircraft see Jane's All the World's Aircraft and Jane's Ai