ATS AIRSPACE CLASSIFICATION

In Singapore's Flight Information Region, airspace is categorized into five classes (A, B, C, D, and G), each serving different types of flights and requiring distinct levels of communication and service from air traffic control. Specifically, Classes A and B are mainly for Instrument Flight Rules (IFR) flights, while Classes C and D cater to both IFR and Visual Flight Rules (VFR) flights. Uncontrolled airspace is designated as Class G, with fewer restrictions.

Key points

• Singapore's airspace is divided into five classes: A, B, C, D, and G.
• Class A airspace is for IFR flights only, while Class B can accommodate both IFR and VFR.
• Classes C and D require communication with air traffic control and provide varying levels of traffic information.
• Uncontrolled airspace is classified as Class G, which offers minimal services.

*Plain-English summary of Civil Aviation Authority of Singapore guidance — always consult the official source (linked above) for current, authoritative requirements.*