This paper addresses the growing concern in the sector of the community represented by the membership of the AGARD Flight Mechanics Panel over the working environment of the modern military pilot of the ability of this man-machine system to perform its assigned mission. The problem facing virtually all modern military command and control systems is processing and selection among increasingly large amounts of information. Poor system design or excessive mission demands result in high operator workload. A crew workload problem exists in todays tactical military aircraft that can contribute to mission failure or loss of pilot and aircraft. This paper presents some examples of current designs in which it appears that design engineers have not understood or have ignored fundamental requirements of human sensory and cognitive characteristics and limitations. It provides some background to the current problem of the man-machine interface in the tactical military aircraft, describes some current approaches to achieving increased mission performance and discusses what is needed to address these issues adequately.