一般来说，从地面以上365米的高度，整个国家都被管制空域覆盖。
In general, from 365m above the ground and higher, the entire country is blanketed by controlled airspace.
无交通管制的空域被定为等级F，而低于海拔5490米、不在机场附近的管制空域是等级 E。
Uncontrolled airspace is designated Class F, while controlled airspace below 5,490m above sea level and not in the vicinity of an airport is Class E.
在晴天，在管制空域内的飞行员可以选择目视飞行规则或者仪表飞行规则的飞行计划，而且联邦航空局的条例是以这样一种方式设计的：在同一空域同时适用目视飞行规则和仪表飞行规则的操作。
On a clear day, a pilot in controlled airspace can choose a VFR or IFR flight plan, and the FAA regulations were devised in a way which accommodates both VFR and IFR operations in the same airspace.
管制空域是指适用FAA规定的空域。
Controlled airspace is that airspace in which FAA regulations apply.
管制空域分为几个不同的类型，类型用字母命名。
Controlled airspace is divided into several different types, designated by letters of the alphabet.
根据国际民航政策，英国管制空域目前不允许任何航班飞行。
In line with international civil aviation policy, no flights are currently permitted in UK-controlled airspace.
研究了在危险天气条件下，在雷达管制空域下，计算航空器预达时间的问题。
Discussing problems of how to forecast ETA (estimated time of arrival) in given bad weather conditions of an air-space within the reach of monitoring radars.
受管制空域，一个范围明确的空域。在该空域内，仪表飞行规则飞行和目视飞行规则飞行有空中交通管制服务。
CONTROLLED airspace, an airspace of defined dimensions within which air traffic control service is provided to IFR flights and to VFR flights in accordance with the airspace classification.
需要持有明确的空中交通管制许可才能进入B类空域，如接近一个大都会机场。
To enter Class B airspace, such as an approach to a major metropolitan airport, an explicit ATC clearance is required.
在某些区域（主要是机场附近），受管制的空域一直延伸到距地面215米之上，而且在紧邻机场的区域，控制区域一直延伸到地表。
In certain areas, mainly near airports, controlled airspace extends down to 215m above the ground, and, in the immediate vicinity of an airport, all the way down to the surface.
在其他地方，在不受控制的空域，飞行员受到的管制较少。
Elsewhere, in uncontrolled airspace, pilots are bound by fewer regulations.
例如，VFR飞行员进入C类空域所要做的就是与空中交通管制建立双向无线电联系。
For example, all a VFR pilot has to do to enter Class C airspace is establish two-way radio contact with ATC.
美国的空域分为21个区域（管制中心），每一个区域都划分为多个扇区。
The United States airspace is divided into 21 zones (centers), and each zone is divided into sectors.
一位空域管制专家表示，作为全国飞行管制的统一组织实施者，空军将出台多种措施，缓解民航航班延误。
's air Force, the country's airspace regulator, will introduce measures to ease flight delays of civilian planes, an airspace regulation expert has said.
如果联航272航班于每天11：05进入某管制员的空域，那么她每天一到那时间就会预计将看到那航班。
If United flight 272 enters a controller's airspace at 11:05 every morning, she expects to see that aircraft show up at that time.
本文主要介绍在航空管制工作中飞行空域监测的意义，以及逼近空域的飞行目标到空域距离的计算方法。
This paper describes the airspace surveillance means in the work of air traffic control and the calculation of the distance between the flight object approaching the airspace and the airspace.
美国的空域分为21个区域（管制中心），每一个区域都划分为多个扇区。
The United States airspace is divided into 21 zones ( centers ) , and each zone is divided into sectors.
空中交通管制（ATC）中心系统的效能变化，直接影响到管制员的工作负荷和管制中心所辖空域的交通容量，是ATC系统的关键运行指标。
The system effectiveness of an air traffic control (ATC) center and its variation directly affect the workload of a controller and the capacity of the airspace controlled by the ATC center.
空中交通管制（ATC）中心系统的效能变化，直接影响到管制员的工作负荷和管制中心所辖空域的交通容量，是ATC系统的关键运行指标。
The system effectiveness of an air traffic control (ATC) center and its variation directly affect the workload of a controller and the capacity of the airspace controlled by the ATC center.
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