What is the definition of uncontrolled airspace?

Uncontrolled airspace is defined as airspace not designated as Class A, B, C, D, or E. This means that it is airspace where air traffic control (ATC) does not provide air traffic services or separation. Pilots operating in uncontrolled airspace are responsible for their own navigation and separation from other aircraft.

In the context of airspace classification, Classes A through E provide specific regulations and control measures. When an area is not classified under these categories, it is termed uncontrolled. This is important for pilots to understand, as it affects how they interact with other aircraft and manage their flights, particularly concerning the responsibility of maintaining visual separation and avoiding collisions.

The other options do not accurately describe uncontrolled airspace. Options related to emergency landings, military operations, or automated systems refer to specific uses or systems but do not define the absence of classification that characterizes uncontrolled airspace.