Understanding Airspace

1200 feet AGL. 4000 feet AGL. 1200 feet MSL.

Class A is not charted. A solid and dotted magenta line A solid gray line

The airspace reverts to Class E or a combination of Class E and G airspace during the hours the tower is not in operation.  The airspace designation normally will not change.

Shaded Magenta. Shaded Blue. Dashed Magenta.

Shaded Magenta Shaded Blue Dashed Magenta

Solid Magenta Shaded Magenta Solid Blue

Class B, C, and D. Class E at 700 and Class E at 1200. Class E 700, Class E 1200, and Class E 14500.

when the weather minimums are below basic VFR. when the associated control tower is in operation.  when the associated Flight Service Station is in operation.