IFRをキャンセル
An instruction to terminate the Instrument Flight Rules flight plan.
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Basic ATC
Browse Basic ATC terms for pilots, air traffic controllers, cabin crew and aviation learners.
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IFRを維持する
A phrase used to instruct the pilot to continue flying under Instrument Flight Rules.
View termILSアプローチクリア
An instruction indicating that the aircraft is authorized to execute an Instrument Landing System approach.
View termQNH
The altimeter subscale setting that causes the altimeter to read elevation above mean sea level at an airfield. Used primarily below transition altitude.
View termRNAVアプローチクリア
An instruction indicating that the aircraft is authorized to execute an RNAV approach.
View termSIDをキャンセル
An instruction to terminate the Standard Instrument Departure procedure.
View termSTARをキャンセル
An instruction to terminate the Standard Terminal Arrival Route procedure.
View termVFRを維持する
A phrase used to instruct the pilot to continue flying under Visual Flight Rules.
View termVORアプローチクリア
An instruction indicating that the aircraft is authorized to execute a VOR approach.
View termさらなるクリアランスを期待してください
An instruction indicating that further clearance will be provided at a specified time or location.
View termできません
A phrase used by pilots to indicate they cannot comply with a specific instruction or clearance.
View termもう一度言ってください
A phrase used to request the repetition of all or part of a previous transmission.
View termアイデント
A function on the aircraft transponder that, when activated, causes the radar return to flash on the controller’s screen for identification.
View termアップウィンド
The initial leg of the traffic pattern after takeoff, flown parallel to the runway and in the direction of departure.
View termアプローチクリア
An instruction indicating that the aircraft is authorized to execute an approach procedure.
View termエプロン
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エンジン始動許可
ATC clearance authorizing the aircraft to start its engines, typically when pushback is not required.
View termオプション
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オーバーヘッド
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オービット
A 360-degree turn in the air to delay or maintain position.
View termクリアード
An explicit authorization by ATC for a pilot to proceed under specified conditions within controlled airspace.
View termクロスウィンド
The flight path at right angles to the landing runway at the upwind end.
View termグランドに連絡
Instruction from ATC to switch communication to the ground control frequency, typically issued after landing or before taxi for departure.
View termゲート
A designated area at an airport where passengers board or disembark from an aircraft.
View termコピーの準備ができました
A phrase used by pilots to indicate they are prepared to receive and write down instructions or clearances.
View termコンタクトアプローチ
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コンフリクトクリア
An indication that the aircraft is no longer in a conflicting situation with another aircraft.
View termゴーアラウンド
An aborted landing approach, requiring the aircraft to climb and reattempt landing.
View termサイドステップ
A maneuver to change from one parallel runway to another during approach.
View termサーキットパターン
A standard rectangular traffic pattern around the airfield used for sequencing aircraft for landing or training operations.
View termショートファイナル
The segment of the final approach path closest to the runway.
View termスイッチして
Instruction to change the aircraft's communication radio frequency to another specified ATC unit or frequency.
View termスクォーク・アイデント
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スタンド
A designated area where an aircraft is parked for loading, unloading, or maintenance.
View termタキシーを継続せよ
An instruction to proceed with ground movement along a designated taxi route or surface without stopping or awaiting further clearance.
View termタキシー・トゥ
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タクシーの準備ができました
A phrase used by pilots to indicate they are prepared to begin taxiing.
View termタクシーウェイ
A path on an airport connecting runways with aprons, hangars, terminals, and other facilities.
View termタッチ・アンド・ゴー
A maneuver in which an aircraft lands on a runway and immediately takes off again without coming to a full stop.
View termタワーに連絡
Instruction from ATC to switch radio communication from the current frequency to the aerodrome control tower frequency for landing or taxi clearance.
View termダイレクトで進入
An ATC instruction authorizing an aircraft to fly directly to a specified point, bypassing the previously assigned route or waypoints.
View termダウンウィンド
The flight path parallel to the landing runway in the opposite direction of landing.
View termダウンウィンドに合流せよ
An instruction to enter the traffic circuit on the downwind leg, parallel to and opposite direction of landing runway.
View termディパーチャーに連絡
ATC instruction to switch radio communication to the departure controller, usually issued shortly after takeoff for enroute climb and navigation.
View termトラフィックアラート
A warning issued to alert the pilot of nearby aircraft that may pose a collision risk.
View termトラフィック未視認
Phrase used by pilots to indicate that they do not have visual contact with the reported traffic.
View termトラフィック視認
Phrase used by pilots to confirm that they have visually acquired the reported traffic.
View termトランスポンダをスタンバイモードに設定
An instruction for a pilot to set the aircraft's transponder to standby mode, ceasing transmission of the transponder signal.
View termトランスポンダコードを設定
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バックタクシー
Taxiing on a runway in the opposite direction of takeoff or landing.
View termパンパン
A radio call indicating an urgent situation that is not immediately life-threatening.
View termビジュアル
A term used to describe operations conducted with visual reference to the terrain.
View termフライトレベル
A standardised altitude expressed in hundreds of feet, based on a pressure setting of 1013.2 hPa.
View termプッシュバックおよびエンジン始動許可
ATC clearance authorizing an aircraft to begin pushback from the gate and start engines.
View termプッシュバックの準備ができました
A phrase used by pilots to indicate they are prepared for the aircraft to be pushed back from the gate.
View termプッシュバック許可
An air traffic control authorization allowing an aircraft to begin pushback from the gate or stand, typically in coordination with ground services.
View termヘディング
The direction in which the aircraft’s nose is pointed, expressed in degrees from magnetic north.
View termベクター指示を予期せよ
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ベースに合流せよ
Instruction to enter the circuit on the base leg, a perpendicular segment to final approach before landing.
View termベースレッグ
The flight path at right angles to the landing runway off its approach end.
View termホールディングパターン
A racetrack-shaped flight path flown to delay an aircraft's approach.
View termホールド
To maintain a specific position or altitude, often in a holding pattern.
View termホールドアット
An instruction to maintain a specific position or altitude until further notice.
View termミスアプローチ
A procedure followed when a landing cannot be completed.
View termメーデー
A distress call indicating a life-threatening emergency requiring immediate assistance.
View termモニター
Listen on a frequency without establishing two-way communication, maintaining awareness of transmissions
View termリードバック
A procedure where the receiving station repeats a received message or its pertinent parts to confirm accurate reception.
View termレベル
A generic term used to denote a pilot's cleared vertical position, whether expressed as an altitude, flight level, or height.
View termレーダーコンタクト
Indication that a particular aircraft is identified on the radar display and radar flight following will be provided
View termレーダーサービス終了
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レーダー誘導
Heading instructions issued to provide navigational guidance by radar
View termローアプローチ
An approach over the runway where the aircraft descends to runway level but does not land, typically followed by a climb-out.
View term上昇して維持せよ
Instruction for the aircraft to begin climbing to the stated altitude and maintain that altitude when reached.
View term上昇して～へ
An instruction to initiate a climb to a specific altitude and level off upon reaching it, unless otherwise directed.
View term上昇を継続せよ
An ATC instruction to maintain or resume climbing to a previously assigned altitude or to a new altitude.
View term了解
A standard radiotelephony term meaning 'I have received all of your last transmission'; it does not imply compliance or agreement.
View term了解
An instruction to confirm that a message has been received and understood.
View term了解、実行します
A radiotelephony term meaning 'will comply'; it signifies that the message has been received, understood, and will be complied with.
View term予想される
Used by ATC to advise pilots of anticipated instructions or clearances, such as altitude changes or approach clearances, to assist with planning.
View term位置報告
A report made by a pilot to ATC providing the aircraft's current position, altitude, and other relevant information.
View term出発の準備ができました
A phrase used by pilots to indicate they are prepared to begin the takeoff roll.
View term到達時に報告
An instruction to notify ATC when a specified altitude or level has been attained.
View term右に旋回
An instruction from ATC to initiate a right turn onto a specific heading, route, or to avoid traffic or terrain.
View term合流せよ
Instruction to intercept and follow a specified route, airway, arrival procedure, or traffic pattern.
View term否定
A standard radiotelephony term meaning 'No'; used to indicate a negative response or denial.
View term周波数変更許可
ATC clearance for the pilot to leave the current frequency, typically when no further communication is required on that frequency.
View term地形
The physical features of the land that may pose a hazard to aircraft.
View term報告してください
An instruction for the pilot to provide specific information, such as position, altitude, or status, either once or at specified intervals.
View term安全アラート
A warning issued to alert the pilot of an immediate safety concern.
View term巡航
The phase of flight where the aircraft maintains a steady altitude and speed.
View term巡航上昇
A climb technique where the aircraft climbs at a constant power setting and speed.
View term巡航降下
A descent at a controlled rate while maintaining cruise speed.
View term左に旋回
An instruction to change aircraft heading by initiating a left turn.
View term待機してください
An instruction meaning 'wait and I will call you'; it indicates that the controller or pilot is temporarily unable to communicate.
View term復唱正しい
A phrase used by ATC to confirm that the pilot's readback of instructions is accurate.
View term急いで
A phrase used to instruct the pilot to hasten a maneuver or action.
View term手前で待機
An instruction to stop before reaching a specified point, usually a runway or intersection, and not proceed until further clearance is received.
View term推定
A term used by pilots to indicate the estimated time of arrival at a specific point.
View term最低燃料
A declaration by a pilot indicating that the aircraft has enough fuel to reach the destination but no extra fuel for delays.
View term最小クリーンスピード
The lowest speed at which an aircraft can fly in a clean configuration without deploying flaps or slats.
View term最終
The last leg of the approach path before landing.
View term最終進入に参加
An instruction to align the aircraft with the final approach path for landing.
View term最終進入を報告
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滑走路
A defined rectangular area on a land aerodrome prepared for the landing and takeoff of aircraft.
View term滑走路に進入して待機
An air traffic control instruction for an aircraft to taxi onto the runway and hold in position, awaiting takeoff clearance.
View term滑走路を横断
An instruction authorizing an aircraft to proceed across a specified runway, typically during taxi operations.
View term滑走路を空けました
Confirmation that the aircraft has exited the runway.
View term滑走路を空ける
An instruction to exit the runway at the nearest suitable exit.
View term滑走路を逆行する
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滑走路方位を維持して
An instruction to continue on the magnetic heading of the runway after takeoff without turning, usually for departure sequencing or obstacle avoidance.
View term滑走路離脱を報告
An instruction to inform ATC when the aircraft has completely left the runway.
View term無視する
A phrase used to instruct the pilot to ignore the previous transmission.
View term現在の高度を維持
Instruction to the pilot to continue flying at the present assigned altitude.
View term目視アプローチクリア
An instruction indicating that the aircraft is authorized to execute a visual approach.
View term着陸許可
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確立を報告
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経由で出発してください
An ATC instruction directing the pilot to follow a specified Standard Instrument Departure (SID) or route after takeoff.
View term経由で進入
An ATC instruction directing an aircraft to follow a specified route, airway, or series of waypoints.
View term継続
An ATC instruction to proceed with the current action or phase of flight without change.
View term維持して
An instruction to continue holding a specified altitude, heading, speed, or other parameter until further advised.
View term緊急降下
A rapid descent by an aircraft in response to an emergency situation.
View term肯定
A standard radiotelephony term meaning 'Yes'; used to indicate a positive response to a question or instruction.
View term自主航法を再開せよ
Instruction for the pilot to return to their own pre-filed or previously assigned route after deviation or vectoring.
View term自分の分離を維持する
A phrase used to instruct the pilot to ensure a safe distance from other aircraft without ATC assistance.
View term航空路に参加
An instruction to enter and follow a designated airway.
View term航空路を離れる
An instruction to exit a designated airway.
View term視覚的分離を維持する
A phrase used to instruct the pilot to visually keep a safe distance from other aircraft.
View term計器
A term used to describe operations conducted with reference to instruments.
View term通過中
A term used by pilots to report the altitude they are currently climbing or descending through.
View term通過時に報告
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速度を上げる
A phrase used to instruct the pilot to increase the aircraft's speed.
View term速度を落とす
A phrase used to instruct the pilot to decrease the aircraft's speed.
View term進入アプローチを継続
An instruction to proceed with the instrument or visual approach but not yet cleared to land.
View term遅く
A phrase used to instruct the pilot to reduce speed.
View term降下して
An instruction from air traffic control directing an aircraft to decrease altitude to a specified level.
View term降下して維持せよ
An instruction to begin descent and level off at the specified altitude, maintaining it until further clearance is issued.
View term降下を継続してください
An ATC instruction directing the pilot to maintain the ongoing descent to a specified level or altitude without interruption.
View term離脱中
Used by pilots to report they are vacating a specific altitude, either climbing or descending from it.
View term離陸をキャンセル
An instruction to abort the takeoff procedure before the aircraft becomes airborne.
View term離陸中止
To stop the takeoff procedure after it has begun but before the aircraft becomes airborne.
View term離陸許可
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風
The current atmospheric conditions affecting aircraft movement.
View term風チェック
A request for the current wind conditions at a specific location.
View term駐車
The area where aircraft are parked for loading, unloading, or maintenance.
View term高度
The height of an aircraft above sea level, usually expressed in feet.
View term高度チェック
A request to verify the current altitude of the aircraft.
View term高度制限
A specified altitude that an aircraft must not exceed or descend below.
View term高度計設定
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～経由でタキシー
An ATC instruction specifying the taxi route an aircraft must follow, indicating designated taxiways and any other routing information.
View term