Comprehensive Aviation Regulation, Licensing, and Airspace Management Practice Test 2026 - Free Practice Questions and Study Guide

Two-way radio communication with the control tower before you enter Class D and maintaining that contact while inside is the requirement that matters. The tower provides the sequencing and, if needed, instructions for traffic in this airspace, so you must be able to talk with them and hear their instructions as you enter and operate there.

For VFR operations, you don't need to file an IFR flight plan or obtain an explicit clearance to enter Class D; simply establishing radio contact is the trigger that allows entry. IFR operations do require ATC clearance to operate in Class D, but the initial entry condition shown here is the two-way communication. That’s why establishing and maintaining two-way radio communications is the correct, best answer.