Special Use Airspace (SUA).  Airspace that exists where  activities must be confined because of their nature. Consists  of prohibited, restricted, warning, military operations, and  alert areas. Speed.  The distance traveled in a given time. Sport Pilot Certificate.  An FAA-issued pilot certificate,  allowing the holder to operate a light-sport aircraft in the  category, class, make and model for which they are endorsed  to do so. SRM.  See Single Pilot Resource Management. Stabilized Approach.  A landing approach in which the pilot  establishes and maintains a constant angle glidepath towards  a predetermined point on the landing runway. It is based on  the pilot’s judgment of certain visual cues, and depends on  the maintenance of a constant final descent airspeed and  configuration. Stall.  A rapid decrease in lift caused by the separation of  airflow from the wing’s surface brought on by exceeding  the critical angle of attack. A stall can occur at any pitch  attitude or airspeed. Stalling speed.  For WSC, the power-off stall speed at the  maximum takeoff weight (the lower limit of the green arc). Standard airport traffic pattern.  The left-hand turn traffic  flow that is prescribed for aircraft landing at, taxiing on, or  taking off from an airport. Reference 14 CFR section 91.126  (a)(1) and AIM chapter 4, section 3. Standard Atmosphere.  Consisting of those atmospheric  conditions at sea level that include a barometric pressure  of 29.92 inches of mercury ("Hg) or 1013.2 millibars, and  a temperature of 15 °C (59 °F). Pressure and temperature  normally decrease as altitude increases. The standard lapse  rate in the lower atmosphere for each 1,000 feet of altitude  is approximately 1 "Hg and 2 °C (3.5 °F). For example, the  standard pressure and temperature at 3,000 feet mean sea  level (MSL) is 26.92 "Hg (29.92 – 3) and 9 °C (15 – 6). Static pressure.  The pressure of air that is still, or not  moving, measured perpendicular to the surface exposed to  the air. Static stability.  The initial tendency an aircraft displays  when disturbed from a state of equilibrium. Stationary front.  A front that is moving at a speed of less  than 5 knots.  Steep turn.  Turn resulting from a degree of bank of 45  degrees or more. Straight-in approach.  Entry into the traffic pattern by  interception of the extended runway centerline (final  approach course) without executing any other portion of the  traffic pattern. Stress management.  The personal analysis of the kinds of  stress experienced while flying, the application of appropriate  stress assessment tools, and other coping mechanisms. Strobe.  A high-intensity white flashing light. Strobe lights  are located on aircraft wingtips to increase aircraft visibility  in low light conditions. Strut.  Wing structural member used to hold the wings in  place instead of the flying and ground wires for some designs.  The “strutted wing” does not use a kingpost. Student Pilot Certificate.  An FAA issued certificate that  permits student pilots to exercise solo pilot privileges with  limitations. This can be a student’s FAA third class medical  or a student pilot certificate issued for flying an LSA using  a driver’s license as medical eligibility. SUA.  See special use airspace. Surface analysis chart.  A report that depicts an analysis of  the current surface weather. Shows the areas of high and low  pressure, fronts, temperatures, dewpoints, wind directions  and speeds, local weather, and visual obstructions. Tailwind.  Wind blowing in the same direction the aircraft is  moving. When an aircraft is flying with a tailwind, its speed  over the ground is equal to its speed through the air, plus the  speed the air is moving over the ground. Takeoff clearance.  ATC authorization for an aircraft to  depart a runway. It is predicated on known traffic and known  physical airport conditions. Taxi.  The movement of an aircraft under its own power  while on the ground. Taxiway.  Airport area designated for aircraft surface  movement. Temporary flight restriction (TFR). Designated airspace  of specified dimension where flight is temporarily restricted  or prohibited. NOTAMs are issued to advise airmen of local  TFR restrictions.  G-16