Special Use Airspace: Restricted, Prohibited and Warning Areas
Special use airspace exists outside the standard Class A-through-G system entirely ? it's defined by the activity happening inside it, not by proximity to an airport or typical traffic volume. This lesson covers the three types that are the most restrictive for any pilot, manned or unmanned: prohibited areas, restricted areas, and warning areas.
Regulatory vs. nonregulatory special use airspace
Prohibited and restricted areas are "regulatory" special use airspace ? they are established through formal rulemaking under 14 CFR Part 73, meaning they carry the force of a specific federal regulation. Warning areas, along with Military Operations Areas and Alert Areas covered in the next lesson, are "nonregulatory" ? established through other administrative processes without a Part 73 rule specifically prohibiting entry. This distinction affects how strictly each type is enforced and how a pilot should think about entering one.
Prohibited areas: flight forbidden entirely
Prohibited areas contain sensitive national security locations, and aircraft operations are forbidden within them ? no exceptions, no scheduling, no coordination process that opens them to routine flight. Well-known examples include the airspace directly over the White House and Camp David. For a Part 107 pilot, a prohibited area is an absolute no-fly zone, full stop, identified on charts with a "P-" designation followed by a number.
Restricted areas: hazardous activities, entry only with permission
Restricted areas contain hazardous activities such as artillery firing, missile operations, or military training exercises ? genuinely dangerous to nonparticipating aircraft when active. Unlike prohibited areas, restricted areas are not permanently closed; they have published active times, and entry may be permitted with prior permission from the controlling agency when the area is not active. In practice, a Part 107 pilot should treat restricted airspace as off-limits unless they have specifically confirmed both that the area is inactive and that any necessary coordination has been completed ? never assume access based on the area simply "not looking busy." Restricted areas are identified with an "R-" designation.
Warning areas: the offshore equivalent
Warning areas serve a similar function to restricted areas but exist offshore ? extending from 3 nautical miles outward from the US coast, over international or partially international waters where the FAA's regulatory authority to restrict foreign aircraft is more limited. Rather than an enforceable restriction, a warning area exists to warn nonparticipating pilots of potentially hazardous activity in that airspace. Warning areas are identified with a "W-" designation and, being nonregulatory, function more as a strong advisory than an absolute legal prohibition ? though the underlying hazard is just as real.
Real-world scenario: planning a coastal inspection near a warning area
A pilot is contracted to inspect infrastructure along a coastline where a charted warning area begins just offshore. Before planning the flight path, the pilot checks the warning area's boundaries to confirm the inspection route stays inside the standard, unrestricted coastal airspace and does not drift into the warning area itself, since the exact activity and schedule within a warning area is not something a routine commercial job should rely on being safe to enter.
Prohibited, restricted, and warning areas ? three levels of special use airspace restriction.
View Larger| Type | Regulatory status | Entry allowed? | Chart designation |
|---|---|---|---|
| Prohibited area | Regulatory (14 CFR Part 73) | Never | P-### |
| Restricted area | Regulatory (14 CFR Part 73) | Only with controlling agency permission when inactive | R-### |
| Warning area | Nonregulatory | Advisory caution, not a legal restriction | W-### |
| Mistake | Why it happens | Correct understanding | Regulation / source |
|---|---|---|---|
| "Restricted areas are always active and always off-limits." | Confusing restricted areas with prohibited areas | Restricted areas have published active times and can sometimes be entered with controlling-agency permission when inactive ? unlike prohibited areas, which are never open. | 14 CFR Part 73 |
| "Warning areas are just as strictly enforced as restricted areas." | Assuming all special use airspace carries the same legal weight | Warning areas are nonregulatory and function as an advisory, while restricted and prohibited areas are established through formal Part 73 rulemaking. | Nonregulatory special use airspace |
Can I ever legally fly a drone into a prohibited area?
No. Prohibited areas forbid aircraft operations entirely, with no coordination or scheduling process that opens them.
Can I fly in a restricted area if it looks inactive?
Only with prior permission from the controlling agency confirming it is genuinely inactive ? never assume based on appearance alone, since the underlying hazard (artillery, missile testing, military exercises) can be extremely dangerous.
Why are warning areas treated differently from restricted areas?
Warning areas exist offshore, often over international waters, where the FAA's regulatory authority over all aircraft (including foreign-flagged ones) is more limited ? so they function as a strong advisory rather than an enforceable Part 73 restriction.
Test Your Knowledge
Answer the questions below to check your understanding. Every answer can be found in the lesson above.