Sectional chart reference
Class E starting 1,200 ft AGL
Faded/soft blue shading (outer edge).
What you are looking at
A FUZZY BLUE band = a Class E FLOOR at 1,200 ft AGL, the everyday 'blanket' of controlled airspace over open country. Cool blue = the HIGH floor.
Over open country IFR planes just cruise high, so the controlled floor only needs to come down to 1,200 ft AGL, leaving the low air below as uncontrolled Class G.
Reading the numbers
The floor = 1,200 ft AGL (AGL, so compare straight to 400 ft). Below it is Class G.
Where people get this wrong
Faded blue BAND (E floor 1,200) vs solid blue LINE (Class B): fuzz = a floor up high, line = a class boundary. Fuzzy blue is rarer: remote, open, mountainous country.
How it is tested
A faded blue band: what is the Class E floor there?
- 1,200 ft AGL
- 700 ft AGL
- 1,200 ft MSL
Show the answer
1,200 ft AGL
Cool blue = the high default floor, 1,200 ft AGL; below it is Class G.
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