is control of the airplane's flight path to a target.    用于自动驾驶操作的对飞机飞往目标地的航径控制。例

Examples are control of heading, altitude, and vertical 如航向，高度，和垂直速度的控制。

speed.

OUTER MARKER, A marker beacon located at or near       远指点标，

the glide slope intercept of an ILS approach. The OM is  位于或靠近仪表着陆系统下滑道截获点的一个指点信

normally located four to seven miles from the runway   标台。它通常位于跑道中心线延长线上距离跑道头4至7

threshold on the extended centerline of the runway.    海里。

OUTFLOW VALVE, A valve in the fuselage for             外流活门，

controlling the airflow from the fuselage to ambient for 机身内用以控制从机身流向外界大气的气流以进行增

pressurization control.                                压控制的活门。

OUTPUT, An information signal going out of a system or 输出，

a part of a system.                                      从一个系统或系统的一部分出来的信息信号。

OUTSIDE AIR TEMPERATURE (OAT), Ambient, or free        外界大气温度（OAT），

air static temperature.                                  外界环境温度或静止大气温度。

OVERHAUL, To return an aircraft or one of its          翻修，

components to a like-new or just manufactured            将飞机或飞机部件修整到近似全新或制造完成时的状

condition.                                             态。

OVERRIDE, Operation of a component by a method         超控，

different from normal operation.                         用不同于正常操作的方法来操作部件。

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英汉对照民用航空词典                                     BOEING

 P

PACK VALVE, A valve for supplying air and controlling 空调组件活门，

air flow from the pneumatic manifold to the air         由气源支管向空调系统供气并控制该气流的活门。