14.class-e-airspace. Class E Airspace
Class E airspace is controlled airspace that is not designated as Class A, B, C, or D. It exists to provide air traffic control (ATC) services to aircraft operating under instrument flight rules (IFR) and to ensure adequate separation between IFR and visual flight rules (VFR) traffic where weather minimums and pilot certification requirements must be enforced. If the airspace is not Class A, B, C, D, or G — and it is controlled — it is Class E.
Class E airspace is depicted on VFR sectional charts using several distinct symbols, each representing a different floor:
- Dashed magenta line — Class E surface area (SFC) at a non-towered airport with weather reporting and instrument approaches. The floor is the surface.
- Shaded magenta — Class E airspace with a floor of 700 feet AGL, established to contain instrument approach procedures.
- Shaded blue — Class E airspace with a floor of 1,200 feet AGL (often the boundary between Class E and Class G).
- Zipper line (blue or magenta) — Class E with a floor at some other specified altitude (e.g., 5,500 ft MSL), labeled on the chart.
- Federal airways (Victor airways) — Class E from 1,200 feet AGL up to but not including 18,000 feet MSL, extending 4 nautical miles each side of the airway centerline.
Unless otherwise designated, Class E airspace extends upward from its charted floor up to but not including 18,000 feet MSL (the floor of Class A). Class E also resumes above FL600 and extends to the limits of controlled airspace.
Operating Requirements
No pilot certificate or equipment endorsements beyond the standard private/student requirements are needed to enter Class E airspace, and no ATC clearance is required for VFR flight. However, IFR flight in Class E requires an ATC clearance, and pilots must comply with applicable VFR weather minimums.
VFR weather minimums in Class E (per 14 CFR 91.155):
- Below 10,000 feet MSL: 3 statute miles visibility; cloud clearance of 500 feet below, 1,000 feet above, 2,000 feet horizontal (the "3-152" rule).
- At or above 10,000 feet MSL: 5 statute miles visibility; 1,000 feet below, 1,000 feet above, 1 statute mile horizontal.
At night, the same Class E minimums apply (Class E does not have separate night rules like Class G does).
Class E Surface Areas
When Class E extends to the surface (depicted by a dashed magenta line), it typically surrounds a non-towered airport that has an instrument approach procedure and weather reporting. The intent is to keep the airport environment controlled so that IFR aircraft executing approaches are protected. To depart IFR from such an airport, a pilot needs an ATC clearance before entering instrument meteorological conditions (IMC). VFR pilots may operate freely so long as they meet the Class E weather minimums.
If the weather drops below VFR minimums in a Class E surface area, Special VFR (SVFR) may be requested from ATC, requiring 1 SM visibility and clear of clouds. SVFR at night requires the pilot to hold an instrument rating and the aircraft to be IFR-equipped.
The 700-foot and 1,200-foot Floors
The 700-foot AGL floor (shaded magenta) is established around airports with instrument approaches but no Class E surface area, lowering the controlled airspace floor so that aircraft on approach remain in controlled airspace earlier in their descent. The 1,200-foot AGL floor (shaded blue) blankets large portions of the United States to provide controlled airspace along en route segments. In remote western areas and over mountainous terrain, the Class E floor may be higher (e.g., 14,500 ft MSL) — these are charted with zipper lines.
Practical Example
A student pilot on a cross-country at 4,500 feet MSL over flat farmland is almost certainly in Class E airspace (above the 1,200-foot AGL floor). She does not need to talk to ATC, but she must maintain at least 3 SM visibility and the standard 152 cloud clearances. If she climbs to 11,000 feet MSL, the minimums tighten to 5 SM and 1-1-1.
Quick Reference
- Floor: Surface, 700 AGL, 1,200 AGL, or otherwise charted
- Ceiling: Up to but not including 18,000 ft MSL
- VFR clearance required: No
- IFR clearance required: Yes
- Two-way radio required: No (VFR)
- Transponder required: Only above 10,000 ft MSL (excluding ≤2,500 AGL) or within 30 NM of a Class B primary airport