AIM Text
Class G airspace (uncontrolled) is that portion of airspace that has not been designated as Class A, Class B, Class C, Class D, or Class E airspace.
Source: FAA Aeronautical Information Manual · current edition · paragraph 3-3-1.
Research Notes
AIM 3-3-1 introduces Uncontrolled Airspace (Class G) — airspace where ATC has no authority.
Class G characteristics:
- Surface to the base of the overlying controlled airspace (typically 700 or 1,200 AGL)
- No ATC services
- VFR weather minimums apply, but Class G has its own (lower) minimums
- No transponder, no ADS-B, no radio requirement
Class G VFR weather minimums:
- Below 1,200 AGL, day: 1 SM, clear of clouds
- Below 1,200 AGL, night: 3 SM, 500-1,000-2,000 cloud clearance
- Above 1,200 AGL but below 10,000 MSL, day: 1 SM, 500-1,000-2,000
- Above 1,200 AGL but below 10,000 MSL, night: 3 SM, 500-1,000-2,000
- Above 10,000 MSL: 5 SM, 1,000-1,000-1 SM (same as Class E)
Where you'll find Class G: Lower altitudes over remote areas. Below 1,200 AGL over much of the western U.S. Surface up to ~700 AGL near small airports (where controlled airspace begins above).