What is provided to all aircraft operating under IFR in controlled airspace?

In controlled airspace, Standard IFR separation is provided to all aircraft operating under Instrument Flight Rules (IFR). This ensures that aircraft maintain a safe distance from one another to prevent mid-air collisions. Standard IFR separation is a fundamental aspect of air traffic control that involves specific horizontal and vertical separation criteria based on the type of air traffic and the airspace in which they are operating. This standardization helps controllers effectively manage the flow of aircraft, ensuring consistent safety protocols across differing situations and environments.

While radar separation and other forms of separation can be used, the term "Standard IFR separation" encapsulates the established procedures and metrics that apply universally to IFR operations within controlled airspace. Therefore, all aircraft operating under IFR can rely on this critical service to maintain safe and efficient operations.