In both civilian and military aviation training much reliance is placed upon expensive flight simulators. The decision to resort to a simulator for training instead of the actual equipment is justified by arguments such as:

Greater utilisation of equipment as training will not be interfered with by factors such as unsuitable weather conditions or unserviceable equipment.

Lower purchase and operating costs of simulators in comparison with the actual equipment.

Increased safety and controlled levels of stress when training is undertaken when using a simulator.

Minimal operational and environmental disturbance.