are used in full flight simulators, which are used for training pilots in worldwide civil aviation, under the rules of the International Civil Aviation Organisation (ICAO) and regional Civil Aviation Authorities such as EASA in Europe and the FAA in the USA. Advantages and disadvantages of simulation in training Advantages Simulators provide a safe means of training in the operation of potentially dangerous craft (e.g., aircraft). The expense of training on real equipment can sometimes exceed the expense of a simulator. Time between training sessions may be reduced since it may be as simple as resetting the motion system to initial conditions. Disadvantages The true environment may not be mimicked identically; therefore the pilot/rider may be confused by the lack of expected sensations or not properly prepared for the real environment. Lining up all sensor inputs to eliminate or at least mitigate the risk of "simulator sickness" can be challenging. Age of participant as well as amount of experience in true environment modifies reactions to simulated environment. See also Degrees of freedom (mechanics) Driving simulator Full motion racing simulator Flight simulator Kinematics Simulator sickness Stewart platform Vestibular system References Virtual reality Simulator rides da:Simulator (forlystelse)