Mayday
A distress call indicating a life-threatening emergency requiring immediate assistance.
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Basic ATC
Browse Basic ATC terms for pilots, air traffic controllers, cabin crew and aviation learners.
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Pan pan
A radio call indicating an urgent situation that is not immediately life-threatening.
View termQNH（气压设定值）
The altimeter subscale setting that causes the altimeter to read elevation above mean sea level at an airfield. Used primarily below transition altitude.
View term下降到
An instruction from air traffic control directing an aircraft to decrease altitude to a specified level.
View term下降并保持
An instruction to begin descent and level off at the specified altitude, maintaining it until further clearance is issued.
View term中止起飞
To stop the takeoff procedure after it has begun but before the aircraft becomes airborne.
View term交通警报
A warning issued to alert the pilot of nearby aircraft that may pose a collision risk.
View term仪表
A term used to describe operations conducted with reference to instruments.
View term估计
A term used by pilots to indicate the estimated time of arrival at a specific point.
View term位置报告
A report made by a pilot to ATC providing the aircraft's current position, altitude, and other relevant information.
View term低空进场
An approach over the runway where the aircraft descends to runway level but does not land, typically followed by a climb-out.
View term侧步
A maneuver to change from one parallel runway to another during approach.
View term侧风
The flight path at right angles to the landing runway at the upwind end.
View term保持
An instruction to continue holding a specified altitude, heading, speed, or other parameter until further advised.
View term保持
To maintain a specific position or altitude, often in a holding pattern.
View term保持IFR
A phrase used to instruct the pilot to continue flying under Instrument Flight Rules.
View term保持VFR
A phrase used to instruct the pilot to continue flying under Visual Flight Rules.
View term保持在
An instruction to maintain a specific position or altitude until further notice.
View term保持当前高度
Instruction to the pilot to continue flying at the present assigned altitude.
View term保持目视间隔
A phrase used to instruct the pilot to visually keep a safe distance from other aircraft.
View term保持自己的间隔
A phrase used to instruct the pilot to ensure a safe distance from other aircraft without ATC assistance.
View term保持跑道航向
An instruction to continue on the magnetic heading of the runway after takeoff without turning, usually for departure sequencing or obstacle avoidance.
View term倒退滑行
Taxiing on a runway in the opposite direction of takeoff or landing.
View term停机
The area where aircraft are parked for loading, unloading, or maintenance.
View term停机位
A designated area where an aircraft is parked for loading, unloading, or maintenance.
View term停机坪
A defined area on an airport intended to accommodate aircraft for purposes of loading or unloading passengers or cargo, refueling, parking, or maintenance.
View term允许启动发动机
ATC clearance authorizing the aircraft to start its engines, typically when pushback is not required.
View term允许推出并启动发动机
ATC clearance authorizing an aircraft to begin pushback from the gate and start engines.
View term允许更换频率
ATC clearance for the pilot to leave the current frequency, typically when no further communication is required on that frequency.
View term准备抄写
A phrase used by pilots to indicate they are prepared to receive and write down instructions or clearances.
View term准备推出
A phrase used by pilots to indicate they are prepared for the aircraft to be pushed back from the gate.
View term准备滑行
A phrase used by pilots to indicate they are prepared to begin taxiing.
View term准备起飞
A phrase used by pilots to indicate they are prepared to begin the takeoff roll.
View term减速
A phrase used to instruct the pilot to reduce speed.
View term减速
A phrase used to instruct the pilot to decrease the aircraft's speed.
View term切换至
Instruction to change the aircraft's communication radio frequency to another specified ATC unit or frequency.
View term到达后报告
An instruction to notify ATC when a specified altitude or level has been attained.
View term加入
Instruction to intercept and follow a specified route, airway, arrival procedure, or traffic pattern.
View term加入下风腿
An instruction to enter the traffic circuit on the downwind leg, parallel to and opposite direction of landing runway.
View term加入基准腿
Instruction to enter the circuit on the base leg, a perpendicular segment to final approach before landing.
View term加入最后进场
An instruction to align the aircraft with the final approach path for landing.
View term加入航路
An instruction to enter and follow a designated airway.
View term加快
A phrase used to instruct the pilot to hasten a maneuver or action.
View term加速
A phrase used to instruct the pilot to increase the aircraft's speed.
View term取消IFR
An instruction to terminate the Instrument Flight Rules flight plan.
View term取消SID
An instruction to terminate the Standard Instrument Departure procedure.
View term取消STAR
An instruction to terminate the Standard Terminal Arrival Route procedure.
View term取消起飞
An instruction to abort the takeoff procedure before the aircraft becomes airborne.
View term右转
An instruction from ATC to initiate a right turn onto a specific heading, route, or to avoid traffic or terrain.
View term向左转
An instruction to change aircraft heading by initiating a left turn.
View term否定
A standard radiotelephony term meaning 'No'; used to indicate a negative response or denial.
View term在指定点前停
An instruction to stop before reaching a specified point, usually a runway or intersection, and not proceed until further clearance is received.
View term地形
The physical features of the land that may pose a hazard to aircraft.
View term基腿
The flight path at right angles to the landing runway off its approach end.
View term复诵
A procedure where the receiving station repeats a received message or its pertinent parts to confirm accurate reception.
View term复述正确
A phrase used by ATC to confirm that the pilot's readback of instructions is accurate.
View term复飞
An aborted landing approach, requiring the aircraft to climb and reattempt landing.
View term复飞
A procedure followed when a landing cannot be completed.
View term守听
Listen on a frequency without establishing two-way communication, maintaining awareness of transmissions
View term安全警报
A warning issued to alert the pilot of an immediate safety concern.
View term将应答机设置为待机模式
An instruction for a pilot to set the aircraft's transponder to standby mode, ceasing transmission of the transponder signal.
View term巡航
The phase of flight where the aircraft maintains a steady altitude and speed.
View term巡航下降
A descent at a controlled rate while maintaining cruise speed.
View term巡航爬升
A climb technique where the aircraft climbs at a constant power setting and speed.
View term应答机识别
An ATC instruction to activate the IDENT feature on the aircraft's transponder, which causes the radar return to flash, allowing identification of the aircraft.
View term忽略
A phrase used to instruct the pilot to ignore the previous transmission.
View term恢复自主导航
Instruction for the pilot to return to their own pre-filed or previously assigned route after deviation or vectoring.
View term批准推出
An air traffic control authorization allowing an aircraft to begin pushback from the gate or stand, typically in coordination with ground services.
View term报告
An instruction for the pilot to provide specific information, such as position, altitude, or status, either once or at specified intervals.
View term报告已建立
An instruction for the pilot to inform ATC when the aircraft is established on a specified segment of the approach, typically the localizer or final approach course.
View term报告已脱离跑道
An instruction to inform ATC when the aircraft has completely left the runway.
View term报告最后进近
An instruction for the pilot to inform ATC when the aircraft is on the final approach segment, aligned with the runway centerline and descending for landing.
View term收到
A standard radiotelephony term meaning 'I have received all of your last transmission'; it does not imply compliance or agreement.
View term收到并将遵照执行
A radiotelephony term meaning 'will comply'; it signifies that the message has been received, understood, and will be complied with.
View term放行ILS进近
An instruction indicating that the aircraft is authorized to execute an Instrument Landing System approach.
View term放行RNAV进近
An instruction indicating that the aircraft is authorized to execute an RNAV approach.
View term放行VOR进近
An instruction indicating that the aircraft is authorized to execute a VOR approach.
View term放行目视进近
An instruction indicating that the aircraft is authorized to execute a visual approach.
View term放行进近
An instruction indicating that the aircraft is authorized to execute an approach procedure.
View term无冲突
An indication that the aircraft is no longer in a conflicting situation with another aircraft.
View term无法
A phrase used by pilots to indicate they cannot comply with a specific instruction or clearance.
View term最低清洁速度
The lowest speed at which an aircraft can fly in a clean configuration without deploying flaps or slats.
View term最低燃油
A declaration by a pilot indicating that the aircraft has enough fuel to reach the destination but no extra fuel for delays.
View term最后进场
The last leg of the approach path before landing.
View term未目视到交通
Phrase used by pilots to indicate that they do not have visual contact with the reported traffic.
View term沿跑道反向滑行
A procedure whereby an aircraft taxis in the opposite direction of take-off or landing on a runway to reach the threshold or exit.
View term清空跑道
An instruction to exit the runway at the nearest suitable exit.
View term滑行至
An ATC instruction authorizing an aircraft to proceed under its own power to a specified location on the aerodrome, such as a runway holding point or parking stand.
View term滑行道
A path on an airport connecting runways with aprons, hangars, terminals, and other facilities.
View term爬升并保持
Instruction for the aircraft to begin climbing to the stated altitude and maintain that altitude when reached.
View term爬升至
An instruction to initiate a climb to a specific altitude and level off upon reaching it, unless otherwise directed.
View term登机口
A designated area at an airport where passengers board or disembark from an aircraft.
View term盘旋
A 360-degree turn in the air to delay or maintain position.
View term目视
A term used to describe operations conducted with visual reference to the terrain.
View term目视到交通
Phrase used by pilots to confirm that they have visually acquired the reported traffic.
View term目视进近
An IFR approach procedure that permits an aircraft under VFR conditions to proceed to the destination airport by visual reference to the surface while operating on an IFR flight plan
View term直接前往
An ATC instruction authorizing an aircraft to fly directly to a specified point, bypassing the previously assigned route or waypoints.
View term短进场
The segment of the final approach path closest to the runway.
View term确认
An instruction to confirm that a message has been received and understood.
View term离开
Used by pilots to report they are vacating a specific altitude, either climbing or descending from it.
View term离开航路
An instruction to exit a designated airway.
View term穿越跑道
An instruction authorizing an aircraft to proceed across a specified runway, typically during taxi operations.
View term等待航线
A racetrack-shaped flight path flown to delay an aircraft's approach.
View term紧急下降
A rapid descent by an aircraft in response to an emergency situation.
View term经由...起飞
An ATC instruction directing the pilot to follow a specified Standard Instrument Departure (SID) or route after takeoff.
View term经由前往
An ATC instruction directing an aircraft to follow a specified route, airway, or series of waypoints.
View term经由滑行
An ATC instruction specifying the taxi route an aircraft must follow, indicating designated taxiways and any other routing information.
View term继续
An ATC instruction to proceed with the current action or phase of flight without change.
View term继续下降
An ATC instruction directing the pilot to maintain the ongoing descent to a specified level or altitude without interruption.
View term继续滑行
An instruction to proceed with ground movement along a designated taxi route or surface without stopping or awaiting further clearance.
View term继续爬升
An ATC instruction to maintain or resume climbing to a previously assigned altitude or to a new altitude.
View term继续进近
An instruction to proceed with the instrument or visual approach but not yet cleared to land.
View term联系地面台
Instruction from ATC to switch communication to the ground control frequency, typically issued after landing or before taxi for departure.
View term联系塔台
Instruction from ATC to switch radio communication from the current frequency to the aerodrome control tower frequency for landing or taxi clearance.
View term联系离场台
ATC instruction to switch radio communication to the departure controller, usually issued shortly after takeoff for enroute climb and navigation.
View term肯定
A standard radiotelephony term meaning 'Yes'; used to indicate a positive response to a question or instruction.
View term航向
The direction in which the aircraft’s nose is pointed, expressed in degrees from magnetic north.
View term航线圈
A standard rectangular traffic pattern around the airfield used for sequencing aircraft for landing or training operations.
View term获准
An explicit authorization by ATC for a pilot to proceed under specified conditions within controlled airspace.
View term获准着陆
An air traffic control authorization for an aircraft to land on a specified runway, indicating that the runway is available and safe for landing.
View term获准起飞
An air traffic control authorization for an aircraft to depart from a specified runway, indicating that the runway is available and safe for immediate takeoff.
View term触地复飞
A maneuver in which an aircraft lands on a runway and immediately takes off again without coming to a full stop.
View term设置应答机代码
An instruction for a pilot to set a specific transponder code, enabling air traffic control to identify and track the aircraft on radar.
View term识别信号
A function on the aircraft transponder that, when activated, causes the radar return to flash on the controller’s screen for identification.
View term请再说一遍
A phrase used to request the repetition of all or part of a previous transmission.
View term请等待
An instruction meaning 'wait and I will call you'; it indicates that the controller or pilot is temporarily unable to communicate.
View term跑道
A defined rectangular area on a land aerodrome prepared for the landing and takeoff of aircraft.
View term跑道已清空
Confirmation that the aircraft has exited the runway.
View term迎风腿
The initial leg of the traffic pattern after takeoff, flown parallel to the runway and in the direction of departure.
View term进入跑道并等待
An air traffic control instruction for an aircraft to taxi onto the runway and hold in position, awaiting takeoff clearance.
View term选择进场
An ATC clearance that permits the pilot to perform a touch and go, stop and go, low approach, or full stop landing at the pilot’s discretion.
View term通过
A term used by pilots to report the altitude they are currently climbing or descending through.
View term通过时报告
An instruction for the pilot to notify ATC when passing through a specific altitude or level.
View term速度
The rate at which an aircraft is moving through the air, usually expressed in knots.
View term雷达引导
Heading instructions issued to provide navigational guidance by radar
View term雷达服务终止
ATC instruction indicating that radar monitoring and associated services are no longer being provided; the pilot must now operate under visual or procedural rules.
View term雷达识别
Indication that a particular aircraft is identified on the radar display and radar flight following will be provided
View term顺风
The flight path parallel to the landing runway in the opposite direction of landing.
View term预计
Used by ATC to advise pilots of anticipated instructions or clearances, such as altitude changes or approach clearances, to assist with planning.
View term预计将接收雷达引导
An advisory indicating that the pilot should anticipate receiving radar vector instructions from ATC at a specified time, altitude, or fix, typically used to sequence traffic or guide aircraft to a specific point.
View term预计进一步放行
An instruction indicating that further clearance will be provided at a specified time or location.
View term风
The current atmospheric conditions affecting aircraft movement.
View term风检查
A request for the current wind conditions at a specific location.
View term飞行高度层
A standardised altitude expressed in hundreds of feet, based on a pressure setting of 1013.2 hPa.
View term高度
The height of an aircraft above sea level, usually expressed in feet.
View term高度层
A generic term used to denote a pilot's cleared vertical position, whether expressed as an altitude, flight level, or height.
View term高度检查
A request to verify the current altitude of the aircraft.
View term高度表设置
The value to which the scale of a pressure altimeter is set so as to indicate elevation or height. In ATC phraseology, this typically refers to the current QNH for a given location.
View term高度限制
A specified altitude that an aircraft must not exceed or descend below.
View term高空越场
A visual maneuver used to enter the traffic pattern from above the airfield, typically involving an initial pass over the runway followed by a break into the pattern.
View term