Class E airspace extends upward from either 700 feet AGL or 1200 feet AGL to, but does not include, which altitude?

Class E airspace extends upward from either 700 feet AGL or 1200 feet AGL to, but does not include, which altitude?

• A. 18000 feet MSL
• B. 10000 feet MSL
• C. 20000 feet MSL
• D. 15000 feet MSL

Answer: (A)

Class E, which starts at either 700 feet or 1,200 feet above the ground, extends upward to the base of Class A airspace, which is 18,000 feet MSL. The phrase “to, but does not include” means 18,000 feet MSL is the upper boundary that is not part of Class E. Once you reach 18,000 feet MSL, you’re in Class A airspace with its own rules and clearances. So the altitude that marks the top of this Class E designation is 18,000 feet MSL. The other numbers aren’t the boundary in this context: they’re either well below the limit (still within Class E) or above it (inside Class A).

Class E, which starts at either 700 feet or 1,200 feet above the ground, extends upward to the base of Class A airspace, which is 18,000 feet MSL. The phrase “to, but does not include” means 18,000 feet MSL is the upper boundary that is not part of Class E. Once you reach 18,000 feet MSL, you’re in Class A airspace with its own rules and clearances. So the altitude that marks the top of this Class E designation is 18,000 feet MSL. The other numbers aren’t the boundary in this context: they’re either well below the limit (still within Class E) or above it (inside Class A).