Asymmetrical airfoil.  An airfoil section that is not the same  on both sides of the chord line. ATC.  Air traffic control. ATIS.  See Automatic Terminal Information Service. Attitude.  The position of an aircraft as determined by the  relationship of its axes and a reference, usually the earth’s  horizon. Attitude of pilot.  A personal motivational predisposition to  respond to persons, situations, or events in a given manner  that can, nevertheless, be changed or modified through  training as sort of a mental shortcut to decision-making. Attitude management of pilot.  The ability to recognize  hazardous attitudes in oneself and the willingness to modify  them as necessary through the application of an appropriate  antidote thought. Automated flight service station.  An FAA air traffic facility  that provides pilot briefings, en route radio communications,  and VFR search-and-rescue services. 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. Automatic Terminal Information Service (ATIS).  The  continuous broadcast (by radio or telephone) of recorded  noncontrol, essential but routine information in selected  terminal areas. Aviation Medical Examiner (AME).  A medical doctor  authorized to perform aviation medical exams for aviators. Axes of an aircraft.  Three imaginary lines that pass through  an aircraft’s center of gravity. The axes can be considered  as imaginary axes around which the aircraft turns. The three  axes pass through the center of gravity at 90° angles to each  other. The axis from nose to tail is the longitudinal axis, the  axis that passes side to side along the wingspan is the lateral  axis and the axis that passes vertically through the center of  gravity is the vertical axis. Ballistic parachute system (BPS).  An optional parachute  system activated by the pilot where the parachute is extracted  for the WSC by a rocket.  Balloon.  The result of a roundout (flare) that is too aggressive  during landing, causing the aircraft to climb. Bank attitude.  The angle of the lateral axis relative to the  horizon. Base leg.  A flight path at right angles to the landing runway  off its approach end. The base leg normally extends from  the downwind leg to the intersection of the extended runway  centerline. Battens.  The airfoil ribs of a WSC that are removed to fold  up the wing. Best-angle-of-climb speed (V$_{X}$).  The speed at which  the aircraft produces the most gain in altitude in a given  distance.  Best glide.  The airspeed at which the aircraft glides the  furthest for the least altitude lost when in non-powered  flight. Best-rate-of-climb speed (V$_{Y}$).  The speed at which the  aircraft produces the most gain in altitude in a given amount  of time. BPS.  See ballistic parachute system. Calibrated airspeed (CAS).  Indicated airspeed corrected  for installation error and instrument error. Although  manufacturers attempt to keep airspeed errors to a minimum,  it is not possible to eliminate all errors throughout the  airspeed operating range. This error is generally greatest at  low airspeeds. In the cruising and higher airspeed ranges,  indicated airspeed and calibrated airspeed are approximately  the same. Refer to the airspeed calibration chart to correct  for possible airspeed errors. Camber.  The curvature of a wing when looking at a cross  section. A wing has upper camber on its top surface and lower  camber on its bottom surface. Carburetor. (1) Pressure: A hydromechanical device  employing a closed feed system from the fuel pump to the  discharge nozzle. It meters fuel through fixed jets according  to the mass airflow through the throttle body and discharges  it under a positive pressure. Pressure carburetors are  distinctly different from float-type carburetors, as they do not  incorporate a vented float chamber or suction pickup from a  discharge nozzle located in the venturi tube. (2) Float-type:  Consists essentially of a main air passage through which the  engine draws its supply of air, a mechanism to control the  quantity of fuel discharged in relation to the flow of air, and a  G-3