Ejection from aircraft at high speeds poses severe injury hazards to the crewmember. As performance characteristics of aircraft are further improved the protection capabilities of ejection systems must also be improved to assure the safety of the crewmember. The demonstration of these ejection system improvements requires extensive testing with manikins that can both effectively evaluate the performance of the ejection seat and assess the injury potential to the crewmember. The United States Air Force (USAF) is embarking on a new effort to design and clevelop an Advanced Dynamic Anthropomorphic Manikin (ADAM) with improved biofidelity and instrumentation over currently available escape system testing dummies. This effort will provide for the development of two prototype (one small and one large) instrumented, anthropomorphic manikins for testing, evaluating and qualifying high-performance aircraft escape systems (inclucling the restraint and harness system effectiveness.) Discussed will be the design specification for ADAM, including the required experimental verification to demonstratc that the manikins mimic specified human hiomechanical responses and are adequate for ejection system testing. Among the required responses are that it provide a human-like reactive live load into the ejection seat and possess realistic dynamics and kinematics due to windblast, impact, vibration and acceleration forces representative of those encountered during ejection from aircraft.