What distinguishes controlled airspace from uncontrolled airspace?

Controlled airspace is characterized by the provision of air traffic control services intended to manage aircraft operations within that airspace. In controlled airspace, air traffic controllers deliver instructions and coordinate traffic to ensure the safe and efficient movement of aircraft. This includes providing separation between aircraft and offering various services such as flight planning assistance and instructions for approach and departure procedures.

In contrast, uncontrolled airspace lacks such comprehensive air traffic control services, making it the responsibility of pilots to see and avoid other aircraft. This fundamental difference establishes the operational protocols and safety measures applicable to each type of airspace. Therefore, the key distinction lies in the availability of air traffic control service, making controlled airspace a managed environment for flight operations.

Regarding the other options, uncontrolled airspace does not include air traffic control services, so any statement suggesting that it does is not accurate. Additionally, since controlled and uncontrolled airspaces operate under different regulatory requirements, their weather minima also vary, further highlighting the differences between the two airspace types.