Federal Aviation Administration Twentieth Edition
2.6.3 Charts. Class E airspace below 14,500 feet MSL is charted on Sectional, Terminal, and IFR Enroute Low Altitude charts.
2.6.4 Vertical limits. Except for 18,000 feet MSL, Class E airspace has no defined vertical limit but rather it extends upward from either the surface or a designated altitude to the overlying or adjacent controlled airspace.
2.6.5 Types of Class E Airspace
2.6.5.1 Surface Area Designated for an Airport.
When designated as a surface area for an airport, the airspace will be configured to contain all instrument procedures.
2.6.5.2 Extension to a Surface Area. There are Class E airspace areas that serve as extensions to Class B, Class C, and Class D surface areas designated for an airport. Such airspace provides controlled airspace to contain standard instrument approach procedures without imposing a commu-nications requirement on pilots operating under VFR.
2.6.5.3 Airspace Used For Transition. There are Class E airspace areas beginning at either 700 or 1,200 feet AGL used to transition to/from the terminal or en route environment.
2.6.5.4 En Route Domestic Areas. There are Class E airspace areas that extend upward from a specified altitude and are en route domestic airspace areas that provide controlled airspace in those areas where there is a requirement to provide IFR en route ATC services, but the Federal airway system is inadequate.
2.6.5.5 Federal Airways. The Federal airways are Class E airspace areas and, unless otherwise specified, extend upward from 1,200 feet to, but not including, 18,000 feet MSL. The colored airways are Green, Red, Amber, and Blue. The VOR airways are classified as Domestic, Alaskan, and Hawaiian.
2.6.5.6 Offshore Airspace Areas. There are Class E airspace areas that extend upward from a specified altitude to, but not including, 18,000 feet MSL and are designated as offshore airspace areas. These areas provide controlled airspace beyond 12 nautical miles from the coast of the U.S. in those areas where there is a requirement to provide IFR en route ATC services and within which the U.S. is applying domestic procedures.
2.6.5.7 Unless designated at a lower altitude, Class E airspace begins at 14,500 feet MSL to, but not including 18,000 feet MSL overlying the 48 contiguous States including the waters within 12 nautical miles of the coast of the 48 contiguous States, the District of Columbia, Alaska, including waters within 12 nautical miles of the coast of Alaska, and that airspace above FL 600; excluding the Alaska peninsula west of longitude 160°00’00”W; and the airspace less than 1,500 feet above the surface of the earth unless specifically so designated.
2.6.6
Separation for VFR Aircraft. No separation services are provided to VFR aircraft.
3.
Class G Airspace
3.1 General
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.
3.2 VFR Requirements
Rules governing VFR flight have been adopted to assist the pilot in meeting his/her responsibility to see and avoid other aircraft. Minimum flight visibility and distance from clouds required for VFR flight are contained in 14 CFR Section 91.155. (See TBL ENR 1.4.1 for a tabular presentation of these rules).
3.3 IFR Requirements
3.3.1 Title 14 CFR specifies the pilot and aircraft equipment requirements for IFR flight. Pilots are reminded that in addition to altitude or flight level requirements, 14 CFR Section 91.177 includes a requirement to remain at least 1,000 feet (2,000 feet in designated mountainous terrain) above the highest obstacle within a horizontal distance of 4 nautical miles from the course to be flown.
3.3.2 IFR Altitudes. (See TBL ENR 1.4.5.)
4. Other Airspace Areas
4.1 Airport Advisory/Information Services
4.1.1 There are three advisory type services available at selected airports. Airports offering these services are listed in the A/FD and the published service hours may be changed by NOTAM D.
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