Which class of ATS airspace requires IFR separation from both IFR and VFR flights?

• A. Class A
• B. Class B
• C. Class E
• D. Class D

Answer: (B)

Class B airspace is designed to tightly manage high-traffic environments around major airports, with ATC providing separation for all aircraft operating inside it. That means an IFR flight must be separated not only from other IFR aircraft but also from VFR traffic within this airspace. The dense and busy nature of Class B requires this level of control to keep every flight safely apart, using explicit clearances, assigned altitudes, and routing as needed. In contrast, other classes don’t guarantee the same blanket IFR separation from VFR across the entire area—Class A is IFR-only (no VFR operations at all), and Class E and D have less comprehensive, situation-dependent control over VFR versus IFR separation.