Definitions (1)

• ASDA(Accelerate Stop Distance Available) : take-off run(이륙 활주) 가능한 길이 + stopway의 길이.
• Acrobatic Flight : 항공기가 의도적으로 수행하는 기동으로 급격한 altitude 변화, abnormal attitude 또는 speed의 abnormal 변화가 포함됨.
• Adequate VIS REF(Adequate Visual Reference) : 특정 visibility report를 받을 수 없거나 특정 장비가 service 중단한 경우, 조종사가 적절한 visual reference를 유지할 수 있다면 공항을 출발할 수 있음. Takeoff run 중 takeoff surface를 지속적으로 식별할 수 있어야 하고, directional control이 유지될 수 있도록 적절한 visual aid를 사용할 수 있어야 함. 적절한 visual aid에는 강한 강도의 runway light, runway centerline light, runway centerline marking 또는 other runway lighting  및 marking을 포함함. 적절한 visual reference와 적절한 OpSpec 승인이 있으면, commercial operator는 1600 RVR 또는 1/4 SM의 visibility로 take off  할 수 있음.
• ADS Agreement : ADS 데이터 보고 조건(즉, air traffic service 부서에서 요구하는 데이터와 ADS service 제공 전에 동의해야 하는 ADS report의 빈도)을 설정하는 ADS 보고 계획. / 참고 - Contract 또는 일련의 contract를 통해 지상 시스템과 항공기 간의 agreement 조건이 교환됨.
• ADS-B : 항공기나 차량을 감지하기 위한 감시 시스템에는 data link transmitter 형태의 협력 장비가 장착되어 있음. 항공기 또는 차량은 자체 GPS에서 얻어지는 position과 data link를 통해 속도와 같은 기타 정보를 주기적으로 방송(broadcast)하며, data link는 지상 기반 tranmitter/receiver(transceiver)에 의해 수신되어 ATC 시설에서 처리(process) 및 표시(display)됨.
• ADS-C Agreemnet : ADS-C data reporting의 조건을 설정하는 reporting plan(즉, air traffic service 부서에서 요구하는 data와 air traffic service 제공에 ADS-C를 사용하기 전에 동의해야 하는 ADS-C report의 빈도). / 참고 - Agreement 조건은 지상 시스템과 항공기 간에 contract 또는 일련의 contract를 통해 교환됨.
• ADS Contract : 지상 시스템과 항공기 간에 ADS agreement를 교환하는 수단으로, ADS report가 시작되는 조건과 report에 포함되는 data를 명시함 / 참고 -  "ADS contract"라는 용어는 ADS event contract, ADS demand contract, ADS periodic contract 또는 emergency mode를 다양하게 의미하는 일반적인 용어. 

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• ASDA(Acclerate Stop Distance Available) : The length of the take-off run available plus the length of the stopway, if provided.
• Acrobatic Flight : Manoeuveres intentionally performed by an aircraft involving an abrupt change in its altitude, an abnormal attitude, or an abnormal variation in speed.
• Adequate VIS REF(Adequate Visual Reference) : Another set of lower-than-standard takeoff minimums is available to Part 121 and Part 135 operations as outlined in their respective OpSpecs document. When certain types of visibility reports are unavailable or specific equipment is out of service, the flight can still depart the airport if the pilot can maintain adequate visual reference. An appropriate visual aid must be available to ensure the takeoff surface can be continuously identified, and directional control can be maintained throughout the takeoff run. Appropriate visual aids include high intensity runway lights, runway centerline lights, runway centerline markings, or other runway lighting and markings. With adequate visual references and appropriate OpSpec approval, commercial operators may take off with a visibility of 1600 RVR or 1/4 SM.
• ADS Agreement : An ADS reporting plan which establishes the conditions of ADS data reporting (i.e., data required by the air traffic services unit and frequency of ADS reports which have to be agreed to prior to the provision of the ADS services). / Note - The terms of the agreement will be exchanged between the ground system and the aircraft by means of a contract, or a series of contracts.
• ADS-B : A surveillance system in which an aircraft or vehicle to be detected is fitted with cooperative equipment in the form of a data link transmitter. The aircraft or vehicle periodically broadcasts its GPS-derived position and other information such as velocity over the data link, which is received by a ground-based transmitter/receiver (transceiver) for processing and display at an air traffic control facility.
• ADS-C Agreement : A reporting plan which establishes the conditions of ADS-C data reporting (i.e. data required by the air traffic services unit and frequency of ADS-C reports which have to be agreed to prior to using ADS-C in the provision of air traffic services) / Note - Ther term of the agreement will be exchanged between the ground system and the aircraft by means of a contract, or a series of contracts.
• ADS Contract : A means by which the terms of an ADS agreement will be exchanged between the ground system and the aircraft, specifying under what conditions ADS reports would be initiated, and what data would be contained in the reports / Note - The term "ADS contract" is a generic term meaning variously, ADS event contract, ADS demand contract, ADS periodic contract or an emergency mode. Ground forwarding of ADS reports may be implemented between ground system.

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※ Introduction To Jeppesen Navigation Charts For Air Carrier Operations (5 AUG 22) 해석