What must pilots avoid entering without clearance?

What must pilots avoid entering without clearance?

• A. Prohibited airspace
• B. Restricted airspace
• C. Danger area
• D. Advisory airspace

Answer: (A)

Some airspace is off-limits by law, and entry is not allowed unless explicit authorization is granted. Prohibited airspace is designated specifically to protect national security or other sensitive interests, so pilots must not enter it without clearance from the appropriate authority. This makes it the correct concept for the question. In contrast, restricted airspace may be entered with proper ATC clearance under specific conditions, danger areas are zones of potential hazards like live firing where access is controlled or avoided, and advisory airspace is informational and not a regulatory prohibition.

Some airspace is off-limits by law, and entry is not allowed unless explicit authorization is granted. Prohibited airspace is designated specifically to protect national security or other sensitive interests, so pilots must not enter it without clearance from the appropriate authority. This makes it the correct concept for the question.

In contrast, restricted airspace may be entered with proper ATC clearance under specific conditions, danger areas are zones of potential hazards like live firing where access is controlled or avoided, and advisory airspace is informational and not a regulatory prohibition.