The term is in reference to the “driver field of vision.” This is another key element according to NASA in a simulator being perceived by the subconscious mind as being realistic. The operator FOV for a pilot is completely different than for a race car driver. The pilot’s FOV being quite large, encompassing almost the entire windscreen area of the aircraft. Whereas, the race car driver’s FOV is very small, encompassing an area roughly six inches by six inches. All images outside of the operator’s FOV are ignored by the subconscious mind and all within the FOV must be the correct proportion to real world objects. If they are not, the simulator is immediately discounted to be unrealistic and no learning can take place.