“…In the aircraft the pilot perceives forces associated with the aircraft such as engine vibration, and actuation of control systems, through both perception and proprioception. 6 Kinaesthesia is the awareness of the orientation and the rates of movement of different parts of the body arising from stimulation of receptors in the joints, muscles, and tendons Note that, in Figure 6, the human pilot is fundamental to the control loop, and understanding the pilot-vehicle system is important for demonstrating the feasibility and effectiveness of the ground-based simulators in detecting A/RPC proneness. For example, [38] describes how helicopter pilots perform a hover: On the one side there are important visual cues such as horizon and optical flow 7 ; on the other side there is also a pilot 'seat of the pants' feeling involving a combination of vestibular, tactile and neuromuscular cues in order to make his own perception and judgement.…”