Glossary ATC.  Air Traffic Control. Attitude management.  The ability to recognize hazardous  attitudes in oneself and the willingness to modify them as  necessary through the application of an appropriate antidote  thought. 14 CFR.  See Title 14 of the Code of Federal Regulations. Acceptable risk.  That part of identified risk that is allowed  to persist without further engineering or management action.  Making this decision is a difficult yet necessary responsibility  of the managing activity. This decision is made with full  knowledge that it is the user who is exposed to this risk. ADM.  See aeronautical decision-making. Automated Surface Observing System (ASOS).  Weather  reporting system which provides surface observations every  minute via digitized voice broadcasts and printed reports. Automated Weather Observing System (AWOS). Automated weather reporting system consisting of various  sensors, a processor, a computer-generated voice subsystem,  and a transmitter to broadcast weather data. Aeronautical decision-making.  A systematic approach to  the mental process used consistently by pilots to determine  the best course of action in response to a given set of  circumstances. It is what a pilot intends to do based on the  latest information he or she has. Aerodynamics.  The science of the action of air on an object,  and with the motion of air on other gases. Aerodynamics  deals with the production of lift by the aircraft, the relative  wind, and the atmosphere. Aircraft.  A device that is used, or intended to be used, for  flight. A/FD.  See Airport/Facility Directory. Autopilot.  An automatic flight control system that keeps an  aircraft in level flight or on a set course. Automatic pilots can  be directed by the pilot, or they may be coupled to a radio  navigation signal. Automatic terminal information service (ATIS).  The  continuous broadcast of recorded non-control information in  selected terminal areas. Its purpose is to improve controller  effectiveness and relieve frequency congestion by automating  repetitive transmission of essential but routine information. Aviation medical examiner (AME).  A physician with  training in aviation medicine designated by the Civil  Aerospace Medical Institute (CAMI). Aviation Routine Weather Report (METAR).  Observation  of current surface weather reported in a standard international  format. AWOS.  See Automated Weather Observing System. Airman Certification Standards.  A holistic, integrated  presentation of specific knowledge, skills, and risk  management elements and performance metrics for each Area  of Operation and Task. The ACS defines what an applicant must know, consider, and do to pass the knowledge and  practical tests for a certificate or rating.  Airplane Flight Manual (AFM).  A document developed  by the airplane manufacturer and approved by the Federal  Aviation Administration (FAA). It is specific to a particular  make and model airplane by serial number, and it contains  operating procedures and limitations. Checklist.  A tool that is used as a human factors aid in  aviation safety. It is a systematic and sequential list of all  operations that must be performed to accomplish a task  properly. Airport/Facility Directory (A/FD).  An FAA publication  containing information on all airports, communications,  and NAVAIDs. Change 1 (January 2016) G-1