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Identifying Class D by tower without radar

Remote Pilot (Part 107) practice question 4 of 21 on Airspace / Classification. ACS element UA.II.A.K1c · difficulty: standard. Want to answer it in a timed quiz? Use the Remote Pilot (Part 107) practice mode.

Question bank updated 2026-09-22

QUESTIONA remote pilot wants to operate near a small airport that has an operational control tower but is not served by a radar approach control. Which class of controlled airspace most likely surrounds this airport?

  1. AClass C, because of the tower
  2. BClass D
  3. CClass G, because there is no radar
Show the answer and explanation

Correct answer: B. Class D

  • A — incorrect A control tower alone does not make an airport Class C; Class C also requires service by a radar approach control and a certain level of IFR operations or enplanements.
  • B — correct The study guide describes Class D as surrounding airports that have an operational control tower; radar approach control service is a feature of Class C airports.
  • C — incorrect Class G is uncontrolled airspace; an airport with an operational control tower is surrounded by controlled airspace.

BACKGROUND

The Remote Pilot Study Guide distinguishes the classes of controlled airspace partly by the services at the primary airport. Class C surrounds airports that have an operational control tower, are serviced by a radar approach control, and have a certain number of IFR operations or passenger enplanements. Class D surrounds airports that have an operational control tower, with no radar requirement stated. Class D generally extends from the surface to 2,500 feet above the airport elevation, and a remote pilot must receive ATC authorization before operating in it.

STUDY TIP

When a scenario mentions a tower but no radar approach control, think Class D; when it adds radar approach control, think Class C.

KEY POINTS

  • Class D surrounds airports with an operational control tower.
  • Class C additionally requires radar approach control service.
  • Both classes require ATC authorization for remote pilots.

SOURCES

  • remote_pilot_study_guide.txt Chapter 2 "Class C Airspace" and "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.