Israel CAA PPL Theory Exam key terms

Official document confirming an aircraft meets the design and safety standards required for legal flight. In Israel it is issued and renewed under CAA oversight, and flying without a valid certificate is prohibited.

Document recording the nationality and registration marks of an aircraft and identifying its owner. It must be carried on board and kept current for the aircraft to be flown legally.

Airspace of defined dimensions within which air traffic control service is provided and in which all flights require an ATC clearance. Classes and boundaries are shown on aeronautical charts.

Authorization from air traffic control for an aircraft to proceed under specified conditions. It is not a guarantee of terrain or traffic separation from other aircraft unless explicitly stated.

Controlled airspace extending upward from the surface around an aerodrome, established to protect approach and departure paths. Entry normally requires a clearance and two-way radio contact.

Controlled airspace of defined dimensions above a specified lower limit, usually above the control zone, within which IFR and VFR flights receive ATC service according to airspace classification.

Rules under which a pilot operates by visual reference to the ground, maintaining specified visibility and cloud separation. VFR flights may only be conducted in visual meteorological conditions.

Minimum flight visibility and distance from cloud that must be maintained for flight under visual flight rules. Values vary with airspace class and altitude and are published in the national AIP.

A clearance allowing a VFR flight to operate within a control zone when weather is below normal VMC minima, subject to ATC approval and specified conditions such as remaining clear of cloud.

Four-digit code set on the aircraft transponder to identify the flight to ATC radar. Pilots must set the assigned code and confirm it by readback before entering controlled airspace.

Mandatory repetition to ATC of clearances and instructions affecting safety, including route, altitude, heading, frequency and squawk. It confirms the pilot has correctly received and understood the message.

Airborne radio device that replies to ground radar interrogations, transmitting identification and altitude information. Mode C provides pressure altitude, aiding ATC in maintaining separation.

The pressure reference set on the altimeter subscale so the instrument indicates the correct altitude. QNH gives elevation above mean sea level; QFE gives height above a reference point.

The altitude below which the altimeter is set to local pressure and above which it is set to standard pressure. It marks the boundary between altitude and flight level reference.

A surface of constant atmospheric pressure related to standard pressure and expressed in hundreds of feet. Aircraft above transition altitude report and maintain flight levels rather than altitudes.

The point at which the aircraft's weight is considered to act. It must remain within a certified forward and aft range for controllability and performance, checked before every flight.

The calculation ensuring the aircraft's total mass and center of gravity position stay within certified limits for the planned flight, accounting for fuel, occupants, baggage and equipment.

The highest total mass at which the aircraft is certified to begin the take-off run. Exceeding it degrades climb performance and may invalidate the aircraft's certification basis.

Pressure altitude corrected for non-standard temperature, representing the altitude the aircraft performance feels. High density altitude reduces engine power, lift and propeller thrust, lengthening take-off runs.

Altitude indicated when the altimeter is set to standard pressure of 1013.25 hPa. It is the basis for performance calculations and for flight levels above transition altitude.

The portion of the wind acting perpendicular to the runway centerline. It must be compared with the aircraft's demonstrated crosswind limit before take-off or landing is attempted.

The part of the wind acting directly along the runway opposite to the direction of travel. It shortens take-off and landing distances and improves climb gradient over the ground.

A rapid change in wind speed or direction over a short distance, often near thunderstorms or fronts. It can cause sudden airspeed loss close to the ground and is a major hazard on approach.

A localized, intense downdraft from a thunderstorm that spreads out on hitting the ground, producing strong divergent winds. It creates severe low-level wind shear and is deadly during approach or departure.

A towering convective cloud associated with thunderstorms, severe turbulence, icing and hail. Pilots must avoid it by a wide margin, particularly below and downwind of the cell.

Accumulation of ice on airframe surfaces, degrading lift and increasing drag and weight. Carburetor icing can occur at moderate temperatures with high humidity even without visible moisture.

A system that directs heated air into the carburetor to prevent or clear ice formation. Applying it reduces engine power, so it is used with care during approach and landing.

The angle between the wing chord line and the relative airflow. Increasing it raises lift up to the critical angle, beyond which the wing stalls regardless of airspeed.

A condition in which the wing exceeds its critical angle of attack, causing airflow separation and a sharp loss of lift. Recovery requires reducing angle of attack, not merely adding power.

The ratio of lift produced to the aircraft's weight, expressed in g. It increases in turns and pull-ups, raising stall speed and structural stress on the airframe.

The tendency of the nose to swing away from the direction of a turn when ailerons are applied, caused by increased drag on the descending aileron. It is countered with coordinated rudder input.

Flight in which the relative airflow meets the aircraft symmetrically, with no slip or skid. It is judged by the slip indicator and maintained with correct rudder pressure.

A deficiency of oxygen reaching body tissues, causing impaired judgment, euphoria and loss of consciousness. It can occur at relatively low altitudes in susceptible or fatigued pilots.

Abnormally rapid breathing that lowers carbon dioxide in the blood, producing dizziness, tingling and confusion. Symptoms resemble hypoxia, so treatment begins with controlled breathing and reassurance.

A false perception of the aircraft's attitude or motion, often when visual references are lost. Pilots must trust instruments and avoid sudden head movements during maneuvering.

Instrument meteorological conditions in which flight visibility and cloud separation fall below VMC minima. A VFR pilot must avoid entering IMC and should turn back or divert if it develops.

A planned change of destination in flight, requiring recalculation of heading, time, fuel and radio communication. Pilots should practice it before it becomes necessary in deteriorating weather.

The minimum fuel that must remain at destination, established by regulation to cover unexpected delays or diversion. It is planned before departure and monitored in flight.

Preparation of route, altitude, fuel, mass and weather information before flight. It includes selecting alternates, calculating headings and times, and filing the required flight plan.

Navigation by calculating position from known starting point, heading, airspeed, wind and elapsed time. It is the foundation of all navigation and must be cross-checked with other sources.

The angular difference between true north and magnetic north at a given location, shown on charts. It converts true courses to magnetic courses for use with the aircraft compass.

The error of a magnetic compass caused by the aircraft's own magnetic fields and electrical equipment. It is recorded on a correction card and applied to magnetic headings.

The direction in which the aircraft's nose points, measured clockwise from a reference meridian. It differs from track, which is the actual path over the ground.

The actual path of the aircraft over the ground, expressed as a direction. Wind causes the track to differ from the heading, requiring a wind correction angle.

A ground-based navigation beacon transmitting radial information. Aircraft receivers display the selected radial, allowing position fixing and course tracking within line-of-sight range.

A ground beacon transmitting a continuous low-frequency signal that aircraft automatic direction finders use to determine bearing. It is subject to static and night-time interference.

Determination of position or direction using ground-based or satellite radio signals. It supplements dead reckoning and includes VOR, NDB, GNSS and distance measuring equipment.

Standardized words and phrases used in radiotelephony to ensure clear, unambiguous communication between pilots and controllers. Non-standard phrasing invites misunderstanding and should be avoided.

The international distress call repeated three times to signal grave and imminent danger requiring immediate assistance. It has absolute priority over all other transmissions.

The urgency call repeated three times to indicate a situation requiring assistance but not immediate danger to life. It has priority over routine traffic but below distress.

A reference model of atmospheric conditions with a sea-level temperature of 15 degrees Celsius and a pressure of 1013.25 hPa. It underpins altimetry, performance charts and instrument calibration.