Class C Airspace inner ring begins at the and extends vertically (by definition) to MSL charted values that generally go up to feet above airport elevation and the outer ring begins at feet above the ground and extend vertically to feet above airport elevation. (NOTE #1: no commas) (NOTE #2: All values on the Sectional Charts are in MSL values)

5 nautical mile

4000 feet

1200 feet

Explanation:

Class C Airspace has inner ring which is also an inner core has usually 5 nautical mile radius. This extends from surface area upto 4000 feet above airport elevation and outer ring starts at an altitude of 1200 feet above ground and is extended upto 4000 feet above airport elevation.

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