Abbreviations of O—Z！
OAS Obstacle assessment surface 障碍物评价面
OBS Observe or observed or observation 观察，遵守
OBSC Obscure or obscured or obscuring 遮蔽，模糊的
OCNL Occasional or occasionally 偶然
OHD Overhead 从上空飞过，架空
OIS Obstacle identification surface 障碍物鉴别面
O/R On request 应请求，根据要求
OTP On top 云上
PANS Procedures for air navigation services 空中航行服务程序
PBC Performance-based communication 基于性能的通信
PBN Performance-based navigation 基于性能的导航
PBS Performance-based surveillance 基于性能的监视
PCD Proceed or proceeding 前进，继续前进，进行
PCT Per cent 百分比，百分率
PDC Pre-departure clearance 起飞前放行
PDG Procedure design gradient 程序设计梯度
PJE Parachute jumping exercise 跳伞演习
PL Ice pellets 冰粒
PLA Practice low approach 实施低空进近
PN Prior notice required 需事先通知
PO Dust/sand whirls (dust devils) 尘/沙卷风（尘暴）
POB Persons on board 机上人员
PPR Prior permission required 需事先得到许可
PPSN Present position 现在位置
PROP Propeller 螺旋桨，推进器
PROV Provisional 临时
PSG Passing 飞过，通过
PSN Position 位置
QDL
Do you intend to ask me for a series of bearings? or I intend to ask you for a series of bearings
(to be used in radiotelegraphy as a Q Code)
你要问我一组方位吗？或我要问你一组方位（在无线电报中用作Q码）
QGE
What is my distance to your station? or Your distance to my station is (distance figures and
units) (to be used in radiotelegraphy as a Q Code)
我距离你的电台多远？或你到我的电台距离是（距离数值和单位）（在无线电报中
用作Q码）
QJH
Shall I run my test tape/a test sentence? or Run your test tape/a test sentence (to be used in
AFS as a Q Code)
我播放我的测试带/一个测试句子好吗？或播放你的测试带/一个测试句子（在航空
固定服务中用作Q码）
QNH
Altimeter sub-scale setting to obtain elevation when on the ground
在地面时取得地面标高所需的高度表拨正
QSP
Will you relay to . . . free of charge? or I will relay to . . . free of charge (to be used in AFS as a Q
Code)
请免费传信给……好吗?或者我能免费传信给……（在航空固定服务中用作Q码）
QTA
Shall I cancel telegram number . . .? or Cancel telegram number . . . (to be used in AFS as a
Q Code)
取消我的……号电报好吗？或取消……号电报（在航空固定服务中用作Q码）
QTF
Will you give me the position of my station according to the bearings taken by the D/F
stations which you control? or The position of your station according to the bearings taken
by the D/F stations that I control was . . .latitude . . . longitude (or other indication of
position), class . . . at . . . hours (to be used in radiotelegraphy as a Q Code)
请告诉我根据你控制的定向台的方位，所得到的我的电台的位置好吗？或者根据我控制的定向台方位得到你的电台位置是：经度……纬度……（或其他位置指示）（在无线电报中用作Q码）
QUJ
Will you indicate the TRUE track to reach you? orThe TRUE track to reach me is . . . degrees
at . . . hours (to be used in radiotelegraphy as a Q Code)
请指明到你电台的真航迹好吗？在……时间到达我台，真航迹是……度（在无线电报中用作Q码）
QDM
Magnetic heading (zero wind) 磁航向（无风）
QDR
Magnetic bearing 磁方位
QTE
True bearing 真方位
RAG Ragged 高低不平的，不规则的（云底），破碎
RCF Radiocommunication failure (message type designator)无线电通信失败（电报种类代号）
RDL Radial 径向方位
RDO Radio 无线电
RDOACT Radioactive 放射性的
RE Recent (used to qualify weather phenomena, e.g. RERA = recent rain)最近（用于说明天气现象，例如：RERA=最近下雨）
REF Reference to . . .or refer to . . . 参阅……
REG Registration 注册，登记
RERTE Re-route 改航，改变航线
RHC Right-hand circuit 右起落航线
RIF Reclearance in flight 飞行中重新许可
ROC Rate of climb 爬升率
ROD Rate of descent 下降率
RON Receiving only 只供收信，只接收
RLNA Requested level not available 申请的飞行高度层不可用
RPLC Replace or replaced 代替，替换
RSCD Runway surface condition 跑道道面情况
RTS Return to service 恢复工作
SD Standard deviation 标准偏差
SDF Step down fix 梯级下降定位点
SKED Schedule or scheduled 班期表，定期
SRY Secondary 二次的，备用的，辅助的
SR Sunrise 日出
SS Sunset 日没
STNR Stationary 静止的，稳定的
SUBJ Subject to 遭受，须经，以……为条件
TA Traffic advisory 交通咨询
TGL Touch-and-go landing 连续起落
THRU Through 通过
TRANS Transmits or transmitter 发射，发射机
TROP Tropopause 对流层顶
UA Unmanned aircraft 无人驾驶航空器
UFN Until further notice 至进一步通知
UNL Unlimited 无限
UNREL Unreliable 不可靠
VCY Vicinity 附近，邻近
VPA Vertical path angle 垂直航径角
VPT Visual manoeuvre with prescribed track 按规定航迹目视机动
WEF With effect from or effective from 自……起生效
WI Within 在……内
WIE With immediate effect or effective immediately 立即生效
WIP Work in progress 工程在进行中，施工
WKN Weaken or weakening 减弱
WO Without 没有
XNG Crossing 穿越