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This handbook departs from the conventional norm, in that the airspace discussions are presented in reverse order, in the belief that it is much easier to learn the airspace from least complicated to most complicated; also, the information presented for basic visual flight rules (VFR) weather minimums is only that necessary for balloon operations. [Figure 5-1] Other information, specifically for instrument flight rules (IFR) flying or night flight, has been omitted, as it has little or no value to the balloon pilot. For a complete discussion of these issues, the balloon pilot should refer to the AIM, or FAA-H- 8083-25, Pilot’s Handbook of Aeronautical Knowledge. 

## Airspace Classification 

The two categories of airspace are regulatory and non- regulatory. Within these two categories, there are four types: uncontrolled, controlled, special use, and other airspace. Figure 5-2 presents a profile view of the dimensions of various classes of airspace. It will be helpful to refer to this figure as this chapter is studied, as well as remembering that almost all sport balloon operations are conducted in Class E or G airspace. 

## Uncontrolled Airspace 

## Class G Airspace 

Class G or uncontrolled airspace is the portion of the airspace that has not been designated as Class A, B, C, D, or E. Class G airspace extends from the surface to the base of the overlying Class E airspace. Although air traffic control (ATC) has no authority or responsibility to control air traffic within Class G airspace, pilots should remember there are VFR minimums which apply while operating in it. Class G airspace is essentially uncontrolled by ATC except when associated with a temporary control tower. [Figures 5-2 and  5-3] 

In the eastern half of the United States, most Class G airspace is overlaid with Class E airspace, beginning at either 700 or 1,200 feet above ground level (AGL). In the western half of the United States, much of the Class G airspace goes up to 14,500 feet before the Class E airspace begins. The pilot is advised to consult the appropriate sectional chart to ensure that he or she is aware of the airspace limits prior to flight in an unfamiliar area. 

Most balloon operations are conducted in Class G airspace. There are no communications requirements to operate in Class G airspace. If operations are conducted at an altitude of 1,200 

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