Special Use Airspace, the Restricted Area That Will Scramble a Fighter, and the MOA That Won't but Should Still Make You Call ATC First

The FAA designates six types of special use airspace in the United States, each with distinct rules for civilian entry and different consequences for violations. Understanding which areas allow civilian transit, which require authorization, and how to determine real-time activation status is a core Airman Certification Standards requirement - and a practical necessity for every cross-country flight you will plan for the rest of your flying life.

What Are the Six Types of Special Use Airspace?

The six types, ordered from most to least restrictive, are: Prohibited Areas, Restricted Areas, Warning Areas, Military Operations Areas (MOAs), Alert Areas, and Controlled Firing Areas. Each has its own chart symbology, rules for civilian entry, and consequences for non-compliance. The practical test expects you to name all six and understand the real-world difference between them.

What Is a Prohibited Area - and What Happens If You Enter One?

Prohibited Areas appear on sectional charts as the letter P followed by a number (e.g., P-47, P-49). These areas protect national security and national welfare at the highest level. There is no authorization process available to a civilian pilot - the answer is no before the question is asked.

The most well-known prohibited area in the United States is P-49, a one-nautical-mile radius over Camp David in Maryland. There is no frequency to call and no waiver to apply for.

Entering a prohibited area without authorization can result in law enforcement response, an FAA certificate action, and at the far end of the consequence spectrum, a military intercept by an armed fighter. This is not hypothetical - it has happened to real pilots. The intercept signal is a wing waggle followed by a rocking motion directing you to follow. It is a very bad day you want no part of.

How Is a Restricted Area Different from a Prohibited Area?

Restricted Areas appear on sectional charts as the letter R followed by a number (e.g., R-2314, R-4700). They contain hazardous activity - artillery firing, aerial gunnery, weapons testing, unusual flight maneuvers. The critical distinction from prohibited areas is that civilian transit can be authorized.

When a restricted area is “hot” (actively in use), you need authorization from the controlling agency to enter. When it is “cold” (not in use), you may fly through it - sometimes without any coordination at all.

How Do You Find Out If a Restricted Area Is Hot or Cold?

Every restricted area has a controlling agency listed in the Chart Supplement (formerly the Airport Facility Directory). Look up the restricted area by its designation number to find the controlling agency - usually a branch of the military - along with scheduled times of use. If the schedule says “continuous,” treat it as hot until you confirm otherwise.

Three reliable ways to check real-time activation status:

1. Call the controlling agency directly using the contact information in the Chart Supplement
2. Contact Leidos Flight Service at 1-800-992-7433, or log in at 1800wxbrief.com for a standard briefing that includes active restricted area information along your route
3. Use your EFB with live data - ForeFlight and Garmin Pilot display charted altitude limits and schedules, but this is charted data, not real-time activation status. For day-of confirmation, use a live source.

The practical rule: if you are not certain whether a restricted area is active, either route around it or get confirmation before you fly through it. That call takes two minutes. An FAA certificate action takes months.

What Are Warning Areas and Where Are They Located?

Warning Areas are identified by the letter W followed by a number (e.g., W-158, W-451). They begin three nautical miles from the U.S. coastline and extend outward over international waters. Because they are in international airspace, the FAA cannot legally prohibit civilian flight - so instead of prohibiting, they warn.

Warning areas contain the same types of hazardous activity as restricted areas: weapons testing, military flight training, and high-performance maneuvering. Civilian pilots are not prohibited from flying through them, but the federal government considered the hazard significant enough to place specific notation on the chart. If you route through a warning area, at minimum get flight following from ATC and ensure someone knows where you are.

Can You Fly Through an Active MOA?

Yes - VFR pilots can legally fly through an active Military Operations Area without a clearance. But whether you should is a separate question from whether you legally can.

Inside an active MOA, fighter jets operate at high speeds and maneuver through multiple altitude layers doing things that are predictable only to the aircrew and the instructor who designed the mission. A light aircraft at cruise altitude is not easy to acquire visually from a fast mover running an intercept profile. Closure rates change the collision geometry in ways that are genuinely dangerous.

The smart move when an active MOA falls on your planned route: contact the controlling ATC facility. The controlling frequency is printed on the sectional near the MOA boundary. Request flight following through the MOA. A radar controller can see you and, in many cases, can coordinate with military scheduling to give you the best routing - or at minimum ensure someone in that airspace environment knows you are there.

IFR pilots get this coordination automatically through their ATC clearance. VFR pilots do not - you have to initiate it yourself.

You can also check MOA activity during preflight. A standard briefing from flight service includes MOA scheduling information for your route. Many MOAs operate on predictable weekday schedules tied to military training rotations. Ask specifically about any MOAs along your route and whether they are scheduled to be active during your flight window.

How Do Altitude Limits Affect Your Routing Options?

Special use airspace does not necessarily extend from the surface to unlimited altitude. A restricted area or MOA might have a floor at 5,000 feet MSL and a ceiling at FL180. If your planned cruise altitude is 2,500 feet MSL, you are legal to fly beneath that airspace with no coordination required.

Read the altitude notation on the sectional carefully. Flying under the floor of special use airspace is a legitimate routing option - and sometimes faster than routing around the lateral boundary entirely.

What Are Alert Areas and Controlled Firing Areas?

Alert Areas are identified by the letter A followed by a number. They indicate high volumes of civilian pilot training or unusual aerial activity - flight training academies, skydiving drop zones, and areas with concentrated instructional flights. There is no prohibition on flying through an alert area, but all pilots - including those conducting the training activity inside - share equal responsibility for collision avoidance.

When routing through an alert area, tighten your traffic scan and make it more methodical. Inside these areas you may encounter aircraft flying slowly, performing unusual maneuvers, recovering from simulated emergencies, or appearing from unexpected directions. If there is an associated common traffic advisory frequency, consider broadcasting your position.

Controlled Firing Areas operate on a different principle entirely: all activity suspends when a non-participating aircraft approaches. Operators use spotters or radar monitoring, and when you show up, they stop. Because the hazard self-terminates, there is no need to chart it. Controlled Firing Areas do not appear on your sectional and will not show up in a briefing. They are not a factor for flight planning.

How Are TFRs Different from Charted Special Use Airspace?

Temporary Flight Restrictions, issued under 14 CFR Part 91, §§ 91.137–91.145, are not printed on sectional charts. They will not appear in your navigation software unless your app is actively pulling live Notice to Air Missions (NOTAM) data. TFRs live entirely in the NOTAM system and appear in your preflight briefing.

Common TFRs include:

• Presidential movement areas - a no-fly bubble around the president’s location and Air Force One
• Wildfire TFRs - protecting aerial firefighting tanker operations from sightseers who create genuine safety hazards
• Disaster area TFRs - activated in the aftermath of hurricanes and other major events
• Sporting event TFRs - 3-nautical-mile radius, extending up to 3,000 feet AGL over major stadiums on game days

TFRs account for a significant portion of airspace violations in general aviation, and nearly all of them are preventable. The cause is almost always the same: a pilot who skipped the NOTAM check during preflight. Presidential TFR violations in particular result in immediate intercept response, certificate suspension, and in some cases criminal referral.

Every preflight, every flight, check NOTAMs. A TFR can go active within hours. Flying the same route last week means nothing today.

What Does the ACS Expect You to Know About Special Use Airspace?

On the practical test, you should be able to:

• Identify each type of airspace on a sectional chart by its designation letters and chart symbology
• Explain the rules that apply to each of the six types, including which allow civilian entry and which do not
• Describe how you would determine whether a given area is active on the day of your flight
• Justify your routing decision - if you route around it, say why; if you request flight following through an MOA, explain how you initiate that contact; if you fly under the floor, demonstrate that you verified your planned altitude is below the charted floor

One thing worth saying directly: the fact that you are legally permitted to fly through an active MOA does not automatically make it a good decision. Legal and safe are not always the same thing. A lot of the judgment calls in aviation live in that gap.

Key Takeaways

• The FAA designates six types of special use airspace: Prohibited, Restricted, Warning, MOA, Alert, and Controlled Firing Area - the practical test expects you to name and explain all six
• Prohibited Areas (P-) allow no civilian entry whatsoever; Restricted Areas (R-) can be legally transited when cold - always verify activation status using the Chart Supplement, Leidos Flight Service at 1-800-992-7433, or 1800wxbrief.com; EFB apps show charted schedules, not real-time status
• VFR pilots can legally fly through an active MOA but should proactively contact the controlling ATC facility for flight following - this coordination happens automatically for IFR pilots but not for VFR
• TFRs are not charted and can activate within hours; they live in the NOTAM system and require a preflight briefing check on every flight, every time
• Primary references: AIM Chapter 3 and 14 CFR Part 73; the FAA Safety Team at FAASafety.gov has free resources on airspace violations and the decision-making that prevents them