Instrument Flying Handbook (FAA-H-8083-15B) Addendum:  Angle of Attack Indicators  April 2015  The FAA along with the General Aviation Joint Steering Committee (GAJSC) is promoting  Angle of Attack (AOA) indicators as one of the many safety initiatives aimed at reducing the  General Aviation accident rate. AOA indicators will specifically target Loss of Control (LOC)  accidents. Loss of control is the number one root cause of fatalities in both General Aviation  (GA) and Commercial Aviation. More than 25% of General Aviation fatal accidents occur  during the maneuvering phase of flight. Of those accidents-half involve stall/spin scenarios.  Technology such as AOA indicators can have a tremendous impact on reversing this trend and  are increasingly affordable for GA airplanes. The purpose of an AOA indicator is to give the pilot better situational awareness pertaining to  the aerodynamic health of the airfoil. This can also be referred as stall margin awareness. More  simply explained, it is the margin that exists between the current AOA that the airfoil will stall  (critical AOA).  Figure 1.  Critical angle of attack, stall, and angle of attack indications.