This appendix contains additional information to supplement the discussion of the National Airspace System, including aircraft separation, air traffic control facilities, and navigation, contained in Section 1.2.1. The airspace structure is a complex environment that requires the use of highly technical air traffic control (ATC) procedures. §91.157 Special VFR weather mini-mums. (a) Except as provided in appendix D, section 3, of this part, special VFR op-erations may be conducted under the weather minimums and requirements of this section, instead of those con-tained in §91.155, below 10,000 feet MSL within the airspace contained by the upward extension of the lateral bound- § 91.126 continue to apply to other airspace classification types under § 91.127 (Class E airspace), § 91.129 (Class D airspace), and § 91.130 (Class C airspace). This is particularly likely when a towered airport is operating as a non-towered airport. Generally, if the airspace is not Class A, B, C, or D, and is controlled airspace it is Class E airspace. Echo airspace is usually used as a way for traffic to transition to an airport in IFR. Special VFR operations are permitted but clearance must be obtained from the controlling facility. Class Echo fills the gap between 1200 ft. to 18000 ft. As far as launching on a cross-country trip in class G airspace, remember that you'll eventually be in an area where class G goes up to 1200 AGL. So you don't have to stay at 600 AGL forever and you can legally fly over congested areas at 1000 AGL just fine. That can be a good idea. It usually isn't, though. A special VFR clearance authorizes the pilot of an aircraft to operate VFR while within Class D airspace when the visibility is at least 1 mile and the aircraft can remain clear of clouds. VFR flight in controlled airspace above 1,200 feet AGL and below 10,000 feet MSL requires a minimum visibility and vertical cloud clearance of Class G Airspace the only uncontrolled airspace. Although ATC has no authority or responsibility to control air traffic, pilots should remember there are visual flight rule (VFR) minimums that apply to Class G airspace. No formal separation services are provided, so it is the responsibility of the pilot to see and avoid other aircrafts. Dimensions C.) 20 nautical miles. The basic VFR weather minimums for operating an aircraft within Class D airspace are: A.) 500-foot ceiling and 1 mile visibility. B.) 1,000-foot ceiling and 3 miles visibility. C.) clear of clouds and 2 miles visibility. B.) 1,000-foot ceiling and 3 miles visibility. .

class g airspace vfr minimums