Lateral stability (rolling).  The stability about the  longitudinal axis of an aircraft. Rolling stability or the ability  of an airplane to return to level flight due to a disturbance  that causes one of the wings to drop.  Latitude.  Measurement north or south of the equator in  degrees, minutes, and seconds. Lines of latitude are also  referred to as parallels.  LDA.  See localizer-type directional aid.  Lead radial.  The radial at which the turn from the DME arc  to the inbound course is started.  Leading edge.  The part of an airfoil that meets the airflow first.  Leading edge devices.  High lift devices which are found  on the leading edge of the airfoil. The most common types  are fixed slots, movable slats, and leading edge flaps.  Jet stream.  A high-velocity narrow stream of winds, usually  found near the upper limit of the troposphere, which flows  generally from west to east.  Jet route.  A route designated to serve flight operations from  18,000 feet MSL up to and including FL 450.  Judgment.  The mental process of recognizing and analyzing  all pertinent information in a particular situation, a rational  evaluation of alternative actions in response to it, and a timely  decision on which action to take.  KIAS.  Knots indicated airspeed.  Knot.  The knot is a unit of speed equal to one nautical mile  (1.852 km) per hour, approximately 1.151 mph.  Kollsman window.  A barometric scale window of a  sensitive altimeter used to adjust the altitude for the  altimeter setting.  Leading-edge flap.  A portion of the leading edge of an  airplane wing that folds downward to increase the camber,  lift, and drag of the wing. The leading-edge flaps are  extended for takeoffs and landings to increase the amount  of aerodynamic lift that is produced at any given airspeed.  LAAS.  See local area augmentation system.  Lag.  The delay that occurs before an instrument needle attains  a stable indication.  Leans, the.  A physical sensation caused by an abrupt correction  of a banked attitude entered too slowly to stimulate the motion  sensing system in the inner ear. The abrupt correction can  create the illusion of banking in the opposite direction.  Land breeze.  A coastal breeze flowing from land to sea  caused by temperature differences when the sea surface is  warmer than the adjacent land. The land breeze usually occurs  at night and alternates with the sea breeze that blows in the  opposite direction by day.  Licensed empty weight.  The empty weight that consists  of the airframe, engine(s), unusable fuel, and undrainable  oil plus standard and optional equipment as specified in the  equipment list. Some manufacturers used this term prior to  GAMA standardization.  Lift.  A component of the total aerodynamic force on an airfoil  and acts perpendicular to the relative wind.  Land as soon as possible.  Land without delay at the nearest  suitable area, such as an open field, at which a safe approach  and landing is assured.  Land as soon as practical.  The landing site and duration of  flight are at the discretion of the pilot. Extended flight beyond  the nearest approved landing area is not recommended.  Limit load factor.  Amount of stress, or load factor, that an  aircraft can withstand before structural damage or failure  occurs.  Lines of flux.  Invisible lines of magnetic force passing  between the poles of a magnet.  L/MF.  See low or medium frequency.  LMM.  See locator middle marker.  Land immediately.  The urgency of the landing is paramount.  The primary consideration is to ensure the survival of the  occupants. Landing in trees, water, or other unsafe areas  should be considered only as a last resort.  Lateral axis.  An imaginary line passing through the center  of gravity of an airplane and extending across the airplane  from wingtip to wingtip.  L  K  J  G-17 