Control To Cover (Aviation)

Controltmp1EEA1_thumbnoun 1. the authority or ability to direct somebody or something 2. □ crowd control the management of the movements of large numbers of people 3. checking or examining ■ verb to direct, to manage or to make a machine, system, procedure, etc., work in the correct way o The purpose of the centrifugal .switch is to control the starting and ignition circuits. (note: The word control in English is used in a different way to similar words in other languages. In English, the verb check is more often used to mean ‘look at and verify’ while control is used in the sense of ‘to make something work in a particular way’: the yoke and rudder pedals are used to control the movement of the aircraft. Note also: controlling – controlled.)

control areatmp1EEA2_thumbnoun the airspace above a particular area on the ground, which is controlled by a particular authority.

Abbreviation CTA

control columntmp1EEA3_thumbnoun the main hand control used by the pilot to control the aircraft in roll and pitch

controlled airspacetmp1EEA4_thumbtmp1EEA5_thumbnoun airspace which is governed by rules and regulations which pilots must comply with. Abbreviation CAS

controllertmp1EEA6_thumbnoun 1. a device which ensures that something operates in the correct way o the propeller speed controller 2. a person who manages systems to ensure the smooth operation of procedures

controlstmp1EEA7_thumbplural noun manual or automatic devices that are used to control a machine, a system, etc., or to make a machine, a system, etc., work in a correct way □ the pilot at the controls of the aircraft the pilot who is operating the flying controls

control surfacestmp1EEA8_thumbtmp1EEA9_thumbplural noun moveable aerofoils, usually on the wings and tail-plane, which can be operated from the cockpit by the pilot, thus changing aircraft attitude control towertmp1EEA10_thumbnoun a tall building on an airfield from which air-traffic controllers organise incoming and outgoing aircraft by speaking to their pilots by radio control zonetmp1EEA11_thumbnoun a designated ATC area. Abbreviation CTR

convectiontmp1EEA12_thumbnoun the process by which hot air rises and cool air descends o Heat is transferred from the Earth’s surface upwards largely by convection.

convectivetmp1EEA13_thumbadjective referring to convection, or something which is affected by the vertical circulation of air □ convective movement movement caused by warm air rising and cool air descending

convective cloudstmp1EEA14_thumb ‘klaudz/ plural noun clouds formed as a result of warm moist air rising and condensing at altitude

conveniencetmp1EEA15_thumbnoun 1.personal comfort and benefit o Reading lights are provided for passengers’ convenience. □ at your convenience when it is least troublesome for you 2. ease of understanding o For convenience we will assume that the Earth is round. 3. usefulness, or easiness to use convenienttmp1EEA16_thumbadjective 1. useful o The circular slide rule has a convenient scale for converting weights and volumes. 2. suitable and unlikely to cause problems o We must arrange a convenient time and place for the meeting.

conventiontmp1EEA17_thumb‘ noun 1. an idea which because of long usage has become normal and accepted o By convention, wind direction is the direction from which the wind blows. 2. a meeting involving large numbers of people and long discussions in order to arrive at an agreed course of action often outlined in a public statement o the Tokyo Convention

conventionaltmp1EEA18_thumbadjective usual or familiar to most people o Every pilot must know the conventional symbols used for depicting the various ground features on charts.

convergetmp1EFD1_thumb‘ verb to come together at a particular point o Meridians converge towards the poles. □ aircraft on converging courses aircraft on courses which may eventually be too close to each other if no corrective action is taken. Opposite diverge convergencetmp1EFD2_thumbnoun the fact of coming together at a particular point o The inter-tropical convergence zone is the zone in which the trade winds from the two hemispheres approach each other. o There is convergence of meridians of longitude at the north and south poles. Opposite divergence

conversetmp1EFD3_thumbnoun the opposite o The converse of port is starboard. □ warm air rises – the converse is also true in other words, cool air descends conversiontmp1EFD4_thumbnoun 1. a change to a different system or set of rules o The conversion of km into nm is not difficult. 2. □ conversion course flying training which enables and qualifies a pilot to fly a different aircraft type

converttmp1EFD5_thumbverb to change to a different system or set of rules o to convert km into nm o How do you convert degrees C into degrees F?

convertertmp1EFD6_thumbnoun a device which alters the form of something o A backup converter converts the alternating current power into direct current.

convertibletmp1EFD7_thumb‘ adjective possible to change easily, e.g. to fit in with a new system or set of standards o The statute mile, unlike the nautical mile, is not readily convertible into terms of angular measurements. conveytmp1EFD8_thumbverb to carry or move from one place to another o A large number of tubes convey the cooling medium through the matrix. o Buses are used to convey passengers from the aircraft to the terminal building. □ to convey information to pass information from one person to another, or from one place to another cooltmp1EFD9_thumbadjective a little cold □ cool weather weather which is not hot, warm nor very cold ■ verb to become or cause to become less hot o The airflow is used to cool the oil. i> air-cooled coolanttmp1EFD10_thumbnoun a substance,usually liquid, used to cool something such as an engine o radiator coolant o The coolant is sprayed into the combustion chamber inlet.

coolertmp1EFD11_thumbnoun a device for cooling  A self-contained system, consisting of an oil tank, pump, filter, cooler, and oil jets, lubricates the auxiliary power unit.

coolingtmp1EFD12_thumbnoun the action of making something cool o the cooling of the oil by the airflow ■ adjective reducing the temperature of something □ cooling medium a substance which reduces the temperature of another substance or material

coordinatetmp1EFD13_thumbverb 1. to bring together the various parts of a procedure or plan to ensure that the operation works correctly o It is the task of air traffic controllers to coordinate the movement of traffic in and out of a terminal. 2. to make different parts of the body work well together o During a hover, helicopter pilots must be able to coordinate movements of both hands and feet.

coordinated flighttmp1EFD14_thumbtmp1EFD15_thumbnoun flight, especially during turns, in which the horizontal and vertical forces acting on the aircraft are in balance o In coordinated flight, the ball in the turn coordinator will be in the centre.

Comment: The ball in the balance indicator of the turn coordinator shows the pilot if the aircraft is in coordinated flight or if it is slipping or skidding. When the ball moves to the left the pilot should apply left rudder pedal pressure, if the ball moves to the right, the pilot should apply right rudder pedal pressure.

Coordinated Universal Timetmp1EFD16_thumb

noun time used in aviation based on the 24-hour clock format. i GMT coordinatestmp1EFD17_thumbplural noun values used to locate a point on a graph or a map o The airfield can be seen on the map at coordinates B:12.

coordinationtmp1F0F1_thumbnoun 1. the process of bringing together the various parts of a procedure or plan to ensure that it works correctly o A rescue coordination centre is set up to control the emergency. 2. the ability to use different parts of the body together well o A pilot must have good hand/eye coordination.

copetmp1F0F2_thumbverb to manage to do something, often with some difficulty o In heavy rainstorms, the windscreen wipers may not be able to cope. o The aircraft structure must be able to cope with increased loads caused by turning movement.

copilottmp1F0F3_thumb, co-pilot noun a licensed pilot who is second in command to the captain of an aircraft o The copilot landed the aircraft.

coptertmp1F0F4_thumbnoun same as helicopter (informal)

cordtmp1F0F5_thumbnoun a strong thread, usually of nylon o Tyres are of pure rubber and are either cord-strengthened or reinforced. (note: Cord is used to reinforce tyres.)

coretmp1F0F6_thumbnoun the central part, the heart of something o The primary windings consist of heavy gauge wire mounted on a soft iron core. □ the core of a problem the central, most fundamental part of a problem Coriolis forcetmp1F0F7_thumbnoun force which accelerates the movement of a rotating mass perpendicular to its motion and towards the axis of rotation o The Coriolis force explains why wind patterns are clockwise in the northern hemisphere and anti-clockwise in the southern hemisphere.

Comment: The Coriolis force acts at a right angle to wind direction and is directly proportional to wind speed. It is named after G. G. Coriolis, a French engineer who died in 1843.

correcttmp1F0F8_thumbadjective right  correct tyre pressure the pressure at which the tyres should be maintained  verb 1. to adjust in order to make right  A servo-motor fitted in the elevator trim system will automatically correct for loads. o Calibrated airspeed or rectified airspeed is indicated airspeed corrected for instrumentation and installation error. 2. to mark answers right or wrong, as in an examination o The instructor has corrected the students’ examination papers. correctiontmp1F0F9_thumbnoun 1. an adjustment or change made to something to make it correct 2. the use of a mathematical formula for adjusting a known inaccuracy of calculation o In applying this correction the reading is converted to that which would occur at mean sea level. 3. an alteration on, e.g. a test answer, which provides the right answer in place of the wrong answer given o I made several corrections to the text.

correctivetmp1F0F10_thumbadjective referring to something designed to correct

corrective actiontmp1F0F11_thumbtmp1F0F12_thumbnoun action taken to put a situation right o If the pilot realises that the plane is too high on the approach, he or she should take corrective action immediately.

correlatetmp1F0F13_thumb‘ verb to measure something against something else in order to form a relationship between the two o Power is measured not by the amount of work done, but by units of accomplishment correlated with time.

correlationtmp1F0F14_thumbnoun a measurable and predictable relationship o At a given speed, there is a correlation between time and distance.

correspondtmp1F0F15_thumbverb 1. to fit with or have a direct relationship with o Movements of the control surfaces correspond to movements of the pilots flying controls. 2. to be similar to o In the interests of passenger comfort, the ideal cabin conditions to maintain would be those corresponding to sea level.

corridortmp1F0F16_thumbnoun same as air corridor

corrodetmp1F0F17_thumbverb 1. to destroy by a slow chemical process such as rust o The sulphur and water content of turbine fuels tend to corrode the components of the fuel and combustion systems. 2. to be destroyed by a slow chemical process such a rust Aluminium will not corrode easily.

corrosiontmp1F211_thumbnoun the destruction of a material by chemical processes Aluminium has a high resistance to corrosion. i> anti-corrosion

corrosion protectiontmp1F212_thumbtmp1F213_thumbnoun action and/or measures taken to prevent corrosion such as rust

corrosivetmp1F214_thumb‘ adjective causing corrosion o Sulphuric acid is very corrosive.

cosinetmp1F215_thumbnoun a trigonometric function defined as the length of the side adjacent to an angle in a right angled triangle divided by the length of the hypotenuse.

Abbreviation cos

countertmp1F216_thumbverb to act against something so as to remove or reduce its effect o For level flight, lift must counter the force of gravity. o Some people find that swallowing hard counters the effects of changes in pressure.

counter-tmp1F217_thumb‘ prefix against

counterclockwisetmp1F218_thumbtmp1F219_thumbadjective, adverb US same as anticlockwise

counter-rotating propellerstmp1F2110_thumbplural noun propellers which turn in opposite directions (note: They are also called contra-rotating propellers.)

coupletmp1F2111_thumbnoun two of some thing □ a couple of minutes two or three minutes ■ verb 1. to connect or to join, often mechanically o The auxiliary power unit is a self-contained unit which normally consists of a small gas turbine engine which is coupled to a gearbox. 2. to combine o Pilot error, coupled with poor weather conditions, resulted in an accident.

couplingtmp1F2112_thumbnoun a joining or connecting component o When not in use, the coupling is sealed by a dust cap.

coursetmp1F2113_thumbnoun 1. an imaginary line across the surface of the Earth which must be followed in order to arrive at the destination □ to alter course to change direction or to follow a different route 2. a formal period of study o a meteorology course 3. continuing time □ in the course of the briefing during the briefing

course correctiontmp1F2114_thumbtmp1F2115_thumbnoun same as heading correction

course deviation indicatortmp1F2116_thumbtmp1F2117_thumbnoun a needle in an omni-bearing indicator which indicates if an aircraft is on a selected course.

Abbreviation CDI

Covertmp1F2118_thumbverb 1. to include e.g.the complete extent of a period of time or the whole of a particular area o The restriction covers the period from 4th-8th July. □ the area covered by the forecast the area which the forecast deals with 2. to deal with a subject, as in a text o The subject of central warning systems is covered in the systems book. 3. to be completely over something so as to hide what is underneath o The area is covered in snow. ■ noun something which goes over something else completely □ cloud cover the amount of cloud □ snow cover a situation in which there is a layer of snow on top of the earth so that the earth cannot be seen

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