U民航专业词汇缩写

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1、uUnit单位uMicro微，微米uYou你,你们uUPPER较上面的，高空的uUnpavedSurface未铺筑道面UAAUpperAdvisoryArea高空咨询区UABUntilAdvisedBy直到XXX通知之前UACCUpperAreaControlCenter高空区域管制中心UADUpperAdvisoryRoute高空咨询航路UARUpperAirRoute高空航路UARTUniversalAsynchronousTransceiver通用异步收发机UASUpperAirSpace髙空空域UERUtilityBusRe

2、lay公用汇流条继电器U/CUndercarriage起落架U/CUnderConstruction正在施工U/CUnclassified未分类的U/DYouWould你（们）将U/DYouHad你（们）有U/DUp/Down上/下U/DUpperDeck上舱UDAUpperAdvisoryArea高空咨询区UDFUltraHighFrequencyDirection-FindingStation超高频定向台UDTUpdate更新U/EUnderExcitation欠激励UFUnderfrequency欠频UFAUntilFurth

3、erAdvise直到进一步通知UFDRUniversalFlightDataRecorder通用飞行数据计录器UFILUndevelopedFilm未冲洗的胶卷UFNUntilFurtherNotice直到另行通知UGUganda乌干达U/GUnderground地下UGAUganda乌干达UGNDUnderground地下UGRADEUpgrade升级UGTUrgent紧急UHDTUnableHigherDuetoTraffic由于活动不能爬升到较高高度UHFUltraHighFrequency超高频UHRDUnheard未听到的

4、UICUpperInformationCentre高空情报屮心UIRUpperFlightInformationRegion高空飞行情报区UISUpperInformationService高空情报服务UKUnitedKingdom联合王国U/KUnknown未知的UKLUnitedKingdomPound英国磅（英磅）UKNUnknown未知的ULUpperLimit上限ULUnload卸货ULBUnderwaterLocator水下指点标ULCUniversalLogicCard通用逻辑卡ULDUnderLoad缺载ULDUnd

5、erwaterLocatingDevice水下定位装置ULLYouShall(will)你（们）将ULRUpperLevelRadarService高空雷达服务ULRUltraLongRange超远程ULTUnlighted无照明的,无灯光的ULTUltimate极限的UMUndermentioned下述的UMUrgentMessage加稳电报U/MUnitOfMeasure测量单位U/MUnscheduledMaintenance不定基维修UNUnitedNations联合国UNUnable不能够UNUnion联合体UNAUnab

6、le不能够UNACCUnaccompanied无人陪同的UNAPUnableToApprove不能批准UNAPVUnableToApprove不能批准UNASGDUnassigned未指定的UNATNDUnattended无人照看的UNAUTHDUnauthorized未认可的UNAVBLUnavailable不能使用的UNAVBLTYUnavailability不能使用UNBALUnbalance不平衡UNBLUnbalance不平衡UNCUncertain不确定的UNCERTUncertain不确定的UNCHDUnchanged

7、未改变的UNCHGUnchanged未改变的UNCKDUnchecked未检査的UNCLRUnclear不清楚的UNCONDUnconditional无条件的UNCORUncorrect不正确的UNCTCUnableToContact联系不上UNCTLUncontrolled不受管制的UNDUnder在……下面UNDUndated无日期的UNDEFUndefined未规定的UNDLDUndelivered未交付的UNDLVUndelivered未交付的UNDELDUndelivered未交付的UNDSTDUnderstand理解，明

8、白UNECUnnecessary不必耍的UNEQLUnequal不相等的UNEXPTUnexpected出乎意料的UNFINUnfinished未完成的UNFWDUnforwarded未运出的UNHRDUnheard未听说的UNICO