Abstract: A hypoxia awareness training system provides education on high altitude flight physiology and simulates atmospheric oxygen concentrations found normally at sea level and at high altitudes. It can be programmed to reduce oxygen levels to correspond with specific altitudes. The rate of change in simulated altitude (oxygen reduction) can be programmed to correspond with normal ascent rates of specific aircraft, thus providing a platform for training pilots to recognize symptoms of themselves or their crewmates under hypoxic conditions. This training is not limited by geographic location and can be performed in a safe and controlled environment, where poor judgment and coordination will not result in disaster.