A

ABEAM (ABM), Beside: An aircraft is abeam a station when that station is 90° to the right or left of the track of

the aircraft. 
正切，當電臺在飛機左側或右側方與航跡成90 度時，飛機正切電臺。                                      

ABSOLUTE ALTITUDE, The actual distance the aircraft is above the ground.
絕對高度，飛機離地面的實際距離。

ABSOLUTE PRESSURE, Pressure of a liquid or gas measured relative to a vacuum.
絕對壓力，相對于真空（無壓力）測得的液體或氣體的壓力。

ACARS, SEE - AIRCRAFT (OR ARINC) REPORTING ADDRESSING AND COMMUNICATION SYSTEM
飛機通信尋址和報告系統，見Aircraft （or ARINC）Reporting Addressing and Communication System．

ACCELERATION, The rate of change in velocity with respect to time.   

加速度，隨時間變化的速度改變率。

ACCESSORY GEARBOX, A part of the engine, mechanically driven by a compressor or an angle gearbox, for driving components necessary for engine and airplane operations.
附件齒輪箱，發動機的一部份，由壓氣機或傘齒輪箱帶動，用來驅動一些使發動機和飛機工作的部件

ACCUMULATOR (NO. 1), A container with hydraulic          蓄壓器（NO．1），

fluid pressurized by dry air or nitrogen for operation of  含有靠干燥空氣或氮氣增壓的液壓油的容器。當沒有正

components when normal hydraulic supply is not           常的液壓源可用時，該容器可用以驅動部件。

available.

ACCUMULATOR (NO. 2), In a computer, a special            存儲器（NO．2），

storage register associated with the arithmetic logic unit, 計算機中，一種與算術邏輯組件有關系的特別存儲寄存

used for holding the results of a computation or data    器，用來存放運算結果或數據傳輸。

transfer.

ACMS, SEE - AIRCRAFT CONDITION MONITORING                飛機狀態監控系統，

SYSTEM                                                     見Aircraft Condition Monitoring System．

ACTUATOR, A mechanical device operated electrically,     作動筒，

hydraulically, pneumatically or mechanically for           由電，液壓，氣源或機械驅動的機械裝置，用于傳送部

transmitting motion between components.                  件之間的運動。

ADC, SEE - AIR DATA COMPUTER                             大氣數據計算機，

                                                           見Air Data Computer．

ADF, SEE - AUTOMATIC DIRECTION FINDER                    自動定向儀，