What must a pilot obtain to enter the DC ADIZ?

• A. ATC permission
• B. Flight plan
• C. Visual clearance
• D. TSA waiver

Answer: (A)

In the DC ADIZ, entry is controlled and depends on authorization from air traffic control. The key requirement is obtaining ATC permission before you can enter, because ATC must positively identify and coordinate with aircraft approaching the restricted area for security and safety reasons.

In practice, pilots normally file an appropriate flight plan (DVFR or IFR), establish two-way radio communication with ATC, and receive a discrete transponder code, but the essential gating factor to enter the DC ADIZ is obtaining ATC permission. Without clearance, entry is not allowed.

The other options don’t fit because a flight plan is a preparatory step, not the authorization itself; a visual clearance isn’t applicable in this controlled airspace; and a TSA waiver isn’t what grants entry to the ADIZ.