Which type of airspace is considered uncontrolled?

Class G airspace is indeed classified as uncontrolled airspace. This type of airspace does not have the same level of air traffic control services as controlled airspace, such as Class A, B, C, and D, where air traffic control is actively involved in managing aircraft movements.

In Class G airspace, pilots operate under Visual Flight Rules (VFR) and have the freedom to navigate without air traffic control clearances, although they must still adhere to basic right-of-way rules and maintain certain visibility and cloud clearance criteria. This level of autonomy allows pilots greater flexibility when flying in areas where air traffic is typically less congested.

The other types of airspace, including Class C, D, and E, are considered controlled airspace. In these classifications, air traffic control services are provided to manage traffic and ensure safety, particularly around busy airports or in certain areas where air traffic could pose a risk. Therefore, Class G airspace's lack of air traffic control oversight is what categorizes it as uncontrolled.