This paper describes the creation of a knowledge-based system, MAS AS (MAneuver Selection Aiding System), which utilizes fuzzy logic, tactical planning, and knowledge-base techniques to select supermaneuver strategies for aiding pilots during defined missions. Supermaneuver strategy selections are based largely on experts' qualitative assessments to rank flight strategies. Because of ranking uncertainties, fuzzy max-min computation is introduced. MASAS consists of a supermaneuverable selector, a tactical planner, and an executive planner. Each of these planners interfaces with a knowledge base and an exception handler. The selector uses max-min operator on the fuzzy relation matrix to select suitable strategies. The tactical planner takes supermaneuver strategies and formulates a regional plan. Regional planning qualifies regional threats effects and identifies potential safe supermaneuvers among threats and within geometry constraints. Validation and integration of these regional plans are the functions of the executive planner. The exception handler is a feedback loop for reselecting and/or replanning supermaneuvers. The flight trajectory, an output from the executive planner, consists of a dynamic sequence of supermaneuver s. I. Introduction A KNOWLEDGE-BASED system, MASAS (MAneuver Selection Aiding System), is described. MASAS applies artificial intelligence technology for aircraft supermaneuver (super-M) selection to assist pilots in dealing with the extended flight envelope in air-to-air engagements. For this effort, the pilot must function both as a system manager and tactical decisionmaker. His task workload assignment will be reduced immensely. A super-M implies very high levels of agility and controllability. Agility is the aircraft ability to make a transition rapidly from one energy state to another. Controllability is its ability to change rapidly the velocity vector and nose attitude under any condition. Interest in super-M technology is evidenced by the enthusiasm of government agencies, industries, and universities. Highlights of super-M are identification and testing of aircraft instability and controllability. Using super-M technology, a Grummafi experimental aircraft was successfully flight tested in late 1983. It served as a proof of concept demonstrating the gains of the unstable aircraft design configuration. Rockwell and Germany's Messerschmit-Boelkow-Elohm experimental aircraft currently under development1 will be flight tested. This aircraft, designed to exhibit extremely high agility, will test the supermaneuverable concepts by considering maneuvers with angles of attack (AOA) of up to 70 deg. It will be able to perform tactical small-radii turns and point its nose in a new direction to fire a quick shot. NASA is ready to start a 5-yr, $60 million program to study aircraft flight at high angles of attack. NASA Langley Research Center has selected a McDonnell Douglas aircraft for preliminary design of an advanced control system.2 A current survey of United States Air Force (USAF), United States Navy (USN), and United States Marine Corps (USMC) fighter pilots resulted in a consensus that the super-M utilization is a promising and desirable capability.3 Given that these