雅思閱讀輔導：各種受控制的空域的各個等級
閱讀段落
Controlled airspace is divided into several different types, designated by letters of the alphabet. Uncontrolled airspace is designated Class F, while controlled airspace below 5,490 above sea level and not in the vicinity of an airport is Class E. All airspace above 5,490m is designated Class A. The reason for the division of Class E and Class A airspace stems from the type of planes operating in them. Generally, Class E airspace is where one finds general aviation aircraft , and commercial turboprop aircraft. Above 5,490m is the realm of the heavy jets, since jet engines operate more efficiently at higher altitudes. The difference between Class E and A airspace is that in Class A, all operations are IFR, and pilots must be instrument-rated, that is, skilled and licensed in aircraft instrumentation. This is because ATC control of the entire space is essential. Three other types of airspace, Class D, C and B, govern the vicinity of airports. These correspond roughly to small municipal, medium-sized metropolitan and major metropolitan airports respectively, and encompass an increasingly rigorous set of regulations. For example, all a VFR pilot has to do to enter Class C airspace is to establish two-way radio contact with ATC. No explicit permission from ATC to enter is needed, although the pilot must continue to obey all regulations governing VFR flight. To enter Class B airspace, such as on approach to a major metropolitan airport, an explicit ATC clearance is required. The private pilot who cruised without permission into this airspace risks losing their license.
段落大意
本段主要介紹了各種受控制的空域的各個等級，以及這些等級的區別和特點。
閱讀筆記
Division of airspace:
1. Uncontrolled airspace: Class F
2. Controlled airspace:
Class E: controlled airspace 5490m, not in vicinity of airport
Class A: 5490m
Difference of E A: A IFR, pilots instrument-rated
Class D=small municipal airports
C= medium-sized metropolitan airports
B=major metropolitan airports
邏輯關系
1. 因果
Jet engines operate more efficiently at higher altitudes.
Above 5,490m is the realm of the heavy jets.
閱讀段落
Controlled airspace is divided into several different types, designated by letters of the alphabet. Uncontrolled airspace is designated Class F, while controlled airspace below 5,490 above sea level and not in the vicinity of an airport is Class E. All airspace above 5,490m is designated Class A. The reason for the division of Class E and Class A airspace stems from the type of planes operating in them. Generally, Class E airspace is where one finds general aviation aircraft , and commercial turboprop aircraft. Above 5,490m is the realm of the heavy jets, since jet engines operate more efficiently at higher altitudes. The difference between Class E and A airspace is that in Class A, all operations are IFR, and pilots must be instrument-rated, that is, skilled and licensed in aircraft instrumentation. This is because ATC control of the entire space is essential. Three other types of airspace, Class D, C and B, govern the vicinity of airports. These correspond roughly to small municipal, medium-sized metropolitan and major metropolitan airports respectively, and encompass an increasingly rigorous set of regulations. For example, all a VFR pilot has to do to enter Class C airspace is to establish two-way radio contact with ATC. No explicit permission from ATC to enter is needed, although the pilot must continue to obey all regulations governing VFR flight. To enter Class B airspace, such as on approach to a major metropolitan airport, an explicit ATC clearance is required. The private pilot who cruised without permission into this airspace risks losing their license.
段落大意
本段主要介紹了各種受控制的空域的各個等級，以及這些等級的區別和特點。
閱讀筆記
Division of airspace:
1. Uncontrolled airspace: Class F
2. Controlled airspace:
Class E: controlled airspace 5490m, not in vicinity of airport
Class A: 5490m
Difference of E A: A IFR, pilots instrument-rated
Class D=small municipal airports
C= medium-sized metropolitan airports
B=major metropolitan airports
邏輯關系
1. 因果
Jet engines operate more efficiently at higher altitudes.
Above 5,490m is the realm of the heavy jets.
