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Class D vertical extent

Remote Pilot (Part 107) practice question 2 of 21 on Airspace / Classification. ACS element UA.II.A.K1c · difficulty: recall. Want to answer it in a timed quiz? Use the Remote Pilot (Part 107) practice mode.

Question bank updated 2026-09-22

QUESTIONClass D airspace generally extends from the surface up to what height?

  1. A4,000 feet above the airport elevation
  2. B10,000 feet MSL regardless of airport elevation
  3. C2,500 feet above the airport elevation
Show the answer and explanation

Correct answer: C. 2,500 feet above the airport elevation

  • A — incorrect 4,000 feet above the airport elevation is the general upper limit of Class C airspace, not Class D.
  • B — incorrect 10,000 feet MSL is the general upper limit of Class B airspace; Class D is defined relative to the airport elevation.
  • C — correct The study guide states that Class D airspace is generally airspace from the surface to 2,500 feet above the airport elevation, charted in MSL.

BACKGROUND

Class D airspace surrounds airports that have an operational control tower. It generally extends from the surface to 2,500 feet above the airport elevation and is charted in mean sea level (MSL). Each Class D area is individually tailored and, when instrument procedures are published, is normally designed to contain them. A remote pilot must receive ATC authorization before operating in Class D airspace.

STUDY TIP

Keep the three tower-related ceilings straight: Class B 10,000 feet MSL, Class C 4,000 feet above the airport, Class D 2,500 feet above the airport.

KEY POINTS

  • Class D generally extends to 2,500 feet above the airport elevation.
  • It is charted in MSL.
  • It surrounds airports with an operational control tower.

SOURCES

  • remote_pilot_study_guide.txt Chapter 2 "Class D Airspace"
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MORE ON AIRSPACE / CLASSIFICATION

SkyDrill is not affiliated with the FAA. This is an original practice item based on 14 CFR part 107, 14 CFR part 89, and the FAA Remote Pilot – Small UAS Study Guide (FAA-G-8082-22). Regulations and handbooks are revised; confirm details against the current edition.