What class of airspace is characterized as uncontrolled?

Class G airspace is characterized as uncontrolled airspace, which means that there are no air traffic control (ATC) services provided to aircraft operating within this airspace. In Class G airspace, pilots operate under visual flight rules (VFR) and are responsible for their own navigation and separation from other aircraft. This type of airspace typically exists at lower altitudes, often extending from the surface up to the base of controlled airspace.

In contrast, Class E airspace, while sometimes described as "less controlled," is still considered controlled airspace where ATC services are provided, especially above certain altitudes. Class D and Class C airspaces are also controlled, with Class D typically surrounding airports with an operational control tower and Class C being associated with larger airports, which require more structured ATC services. Understanding the characteristics of these airspaces is crucial for maintaining safety and compliance in aviation operations.