Class E Airspace and Operating Requirements
Class E is the most widespread airspace class by area, and it is also the source of one of the most commonly missed distinctions on the Knowledge Test: most Class E airspace does NOT require Part 107 authorization, even though it is technically "controlled" airspace. This lesson explains exactly why, and identifies the one specific type of Class E that genuinely does need authorization.
Class E is the "everything else" controlled airspace category
Class E covers all controlled airspace that isn't specifically designated Class A, B, C, or D. It exists to provide instrument flight rule separation services at various altitudes across most of the country, and its ceiling generally runs up to (but not including) 18,000 feet MSL, where Class A begins. Unlike Class B, C, and D, Class E is not built around a single airport in most locations ? it covers vast stretches of the country with a floor set at different altitudes depending on the area.
The most common Class E floors: 700 feet and 1,200 feet AGL
The two most widespread Class E floor altitudes are 700 feet AGL and 1,200 feet AGL. On a sectional chart, a 700-foot floor is shown with a shaded magenta ring (a "vignette"), and a 1,200-foot floor is shown with a shaded blue vignette ? Module 4 covers reading these symbols directly on a chart in full detail. Crucially, since standard Part 107 operations are capped at 400 feet AGL, the overwhelming majority of everyday sUAS flights never actually reach these Class E floors at all ? meaning they're flying in the uncontrolled Class G airspace beneath Class E, not inside Class E itself.
The one Class E type that DOES require authorization: surface areas
Some airports without an operating control tower (or with specific instrument approach capability) have a Class E surface area designated specifically for that airport, extending down to the surface within defined lateral boundaries ? depicted on a sectional chart with a dashed magenta line. This is the one specific circumstance where Class E genuinely requires 14 CFR 107.41 authorization: only Class E airspace within the lateral boundaries of a surface area designated for an airport needs prior ATC authorization. The much more common 700-foot and 1,200-foot floor Class E, away from any such surface area, needs no authorization at all.
Real-world scenario: two flights, two very different answers
A pilot plans a rooftop inspection in a rural area where the sectional chart shows a 700-foot magenta-shaded Class E floor overhead. Since the planned flight altitude of 150 feet AGL is well below that 700-foot floor, the flight operates in Class G, not Class E ? no 107.41 authorization is needed for airspace reasons.
The same pilot later takes a job near a small non-towered airport that has a designated Class E surface area (visible as a dashed magenta line on the chart) because it has an instrument approach procedure. Here, Class E extends all the way to the surface within that boundary ? meaning even a 50-foot-AGL flight inside that dashed magenta line requires 107.41 authorization, exactly like operating inside a Class D cylinder.
Most Class E airspace has a raised floor and needs no authorization; only surface areas reach the ground and require it.
View Larger| Floor type | Typical altitude | Chart symbol | 107.41 authorization required? |
|---|---|---|---|
| Standard Class E | 700 ft AGL | Shaded magenta vignette | No, for standard sUAS altitudes below the floor |
| Standard Class E | 1,200 ft AGL | Shaded blue vignette | No, for standard sUAS altitudes below the floor |
| Surface area designated for an airport | Surface | Dashed magenta line | Yes, throughout the entire designated area |
| Mistake | Why it happens | Correct understanding | Regulation / source |
|---|---|---|---|
| "Class E is controlled airspace, so it always requires authorization." | Overgeneralizing the controlled-airspace authorization requirement from Classes B, C, and D | 107.41 requires authorization only for Class E surface areas designated for an airport, not for the much more common 700 ft or 1,200 ft floor Class E. | 14 CFR 107.41 |
| "A drone flying below 400 feet AGL somewhere with a 700-foot Class E floor is technically in Class E." | Confusing lateral coverage with actual vertical position | A flight below the Class E floor is in the underlying Class G airspace, not Class E itself. | Airspace definitions |
Does every Class E area require Part 107 authorization?
No. Only Class E surface areas designated for an airport require authorization under 107.41. Standard Class E with a 700-foot or 1,200-foot floor does not, since typical sUAS flights stay below those floors entirely.
How do I identify a Class E surface area on a sectional chart?
It's shown with a dashed magenta line, distinct from the shaded magenta or blue vignettes used for the more common 700-foot and 1,200-foot Class E floors ? covered in full in Module 4.
If I'm flying below a 700-foot Class E floor, what airspace am I actually in?
Class G ? the uncontrolled airspace beneath the Class E floor, covered in the next lesson.
Test Your Knowledge
Answer the questions below to check your understanding. Every answer can be found in the lesson above.