The Military Operations Area, the Blue Polygon Every Student Routes Around on Every Cross-Country, and the Radio Call That Often Puts You Right Through the Middle

A Military Operations Area (MOA) is a block of airspace reserved for military training - aerobatics, air combat maneuvering, high-speed intercepts - appearing on sectional charts as a blue-shaded polygon with the MOA name and altitude limits printed inside. VFR pilots are not prohibited from entering an active MOA, but FAR Part 91 requires them to “exercise extreme caution.” The reflex to route around every blue polygon on the chart costs unnecessary time and fuel; the right answer is often a radio call.

What Are the Different Types of Special Use Airspace?

Special use airspace appears on every sectional chart in several distinct categories. The Airman Certification Standards expect you to know not just the definitions, but the operational difference - what you can enter, what you cannot, and who makes that call.

Prohibited Areas (blue P + number) are absolute limits, protecting locations like the White House, Camp David, and certain nuclear and security installations. There is no frequency to call, no authorization process. Route around, full stop.

Restricted Areas (blue R + number) contain hazardous military activity - artillery fire, air-to-ground gunnery, missile testing. VFR pilots cannot enter without permission from the controlling authority, but that authority can grant permission. Check the Chart Supplement (formerly the Airport/Facility Directory) for the controlling agency and contact frequency. Some Restricted Areas are designated “by ATC,” meaning the controlling agency has delegated authorization directly to air traffic control. NOTAMs will reflect current status.

Warning Areas carry the same internal hazard as Restricted Areas but sit over international waters, where domestic airspace authority doesn’t apply in the same way. Treat them identically to Restricted Areas when planning coastal routes.

Alert Areas (blue A) carry no restriction at all. They flag high volumes of pilot training or unusual aerial activity - often near large flight training hubs or military primary training bases. No permission required; fly through with eyes out and radio active.

National Security Areas use a magenta border with NSA on the chart. The FAA requests voluntary avoidance for national security reasons. There is no enforcement mechanism behind the request, but the request is genuine.

Military Operations Areas sit in their own category, addressed in detail below.

What Happens Inside a MOA?

Military pilots use MOAs for training activity that is fundamentally incompatible with mixing uncoordinated civilian traffic through the area. That activity includes:

• Air combat maneuvering
• Aerobatics
• Formation flying
• High-speed intercept profiles
• Dissimilar air combat training - two aircraft with very different performance envelopes flying against each other to simulate real threat encounters

Some MOAs accommodate supersonic aircraft. Military pilots during these exercises are not necessarily receiving radar separation from anyone. MOAs exist because that activity needs a defined, managed volume of airspace - not to exclude civilians out of bureaucratic habit.

Can a VFR Pilot Legally Fly Through an Active MOA?

Yes - with important caveats. FAR Part 91 states that VFR pilots shall exercise extreme caution when flying through an active MOA. That language is not a prohibition; it is a regulatory acknowledgment that the hazard is real while stopping short of a ban. VFR pilots have the legal right to fly through an active MOA.

IFR pilots do not have that same right. ATC will not clear an IFR flight through an active MOA without coordinating with the controlling agency first.

How Do I Read MOA Altitude Limits on a Sectional?

Every MOA has a floor and a ceiling printed on the sectional chart and detailed in the Chart Supplement. Many MOAs do not own the airspace from the surface - floors are commonly at 3,000 feet AGL, 6,000 feet MSL, or higher. If your cruising altitude falls below the MOA floor, you may fly under it with no conflict at all.

Pay close attention to whether altitudes are expressed in mean sea level (MSL) or above ground level (AGL) - the distinction matters significantly over terrain with any elevation. A Chart Supplement entry might read “surface to but not including FL180” or “5,000 MSL to FL240.” These describe fundamentally different volumes of airspace.

How Do I Find Out If a MOA Is Active During My Flight?

The most important question about any MOA is not whether you can enter - it is whether the MOA is active when you are there.

Check the Chart Supplement first. The entry for each MOA lists scheduled operating times, altitude limits, the controlling agency, and published contact frequencies. Some MOAs activate on a fixed schedule; others activate by NOTAM only; some use both mechanisms.

Time of day and day of week matter more than almost anything else in the decision. Military flight training follows working-hours schedules. A MOA active Monday through Friday from 0600 to 2200 local may be completely cold on a Saturday afternoon, on federal holidays, or during holiday stand-downs. A Sunday morning departure is a very different calculation than a Tuesday afternoon in late spring.

A standard preflight briefing through 1800wxbrief - or your EFB’s NOTAM pull - will show active MOA activations along your route. When you provide your route of flight, the briefer will address special use airspace active during your proposed flight window. Asking specifically about MOA status confirms the information and puts it in your briefing record.

What Are My Three Options When a MOA Is Active?

After confirming a MOA is active during your flight, three options are available:

Option 1: Route around it. Plot an alternate course. Know the added distance and time before deciding - sometimes the penalty is significant, sometimes it is not.

Option 2: Fly under it. If your planned cruising altitude falls below the MOA floor, there may be no conflict. Always verify the specific altitude range in the Chart Supplement against your planned altitude.

Option 3: Fly through it with proper risk management. Request flight following from ATC - a center or approach controller will know the MOA’s status and can coordinate with the controlling agency or provide traffic advisories. Alternatively, contact the controlling agency directly on the frequency published in the Chart Supplement.

No option is automatically right or wrong. Each has tradeoffs. Routing around costs time and fuel. Flying through requires genuine risk assessment and active communication. The goal is making the decision with real information, not drawing lines around blue polygons by reflex.

What Does the Radio Call to a MOA Controlling Agency Sound Like?

Contacting a MOA’s controlling agency is a routine call - military facilities handle these requests regularly and will not be caught off guard. The format:

[Facility name], [aircraft N-number and type], [position], [altitude], requesting traffic advisories through [MOA name].

The controlling agency will either provide traffic advisories, advise that advisories are not available but pass along their traffic picture, or let you know that active traffic makes transit inadvisable at that time. That last outcome is exactly why the call is worth making - it converts an unknown hazard into a known one and gives you actionable information.

What Will the Examiner Ask About MOAs on the Oral?

The Airman Certification Standards for private pilot expect you to reason through MOA decisions, not recite definitions. When an examiner places a sectional section in front of you during the oral and asks you to walk through a cross-country route, they want to see the decision process:

• What are this MOA’s scheduled operating hours?
• Is it active during my proposed flight window?
• What are the altitude limits relative to my planned cruising altitude?
• What tools - flight following, direct contact with the controlling agency - are available to me?
• What is my plan?

Pilots who develop that reasoning process on early cross-countries build the kind of airspace fluency that makes complex routes routine. That fluency does not come from avoiding every blue shape on the chart - it comes from understanding what each type of airspace actually means.

Key Takeaways

• MOAs are not automatic detours. VFR pilots may legally fly through an active MOA; the regulatory requirement is to exercise extreme caution.
• Check active status before every flight. MOA schedules are in the Chart Supplement; NOTAM activations appear in a standard preflight briefing via 1800wxbrief.
• Time of day and day of week are often decisive. Many MOAs follow weekday working-hours schedules and are cold on weekends and federal holidays.
• Altitude limits are not decorative. Many MOAs have floors well above the surface - know the MSL or AGL floor relative to your planned altitude; you may pass under the MOA entirely.
• A radio call to the controlling agency is a legitimate planning tool. The frequency is in the Chart Supplement, and the call turns an unknown risk into a managed one.
• Reference sources: the FAA Aeronautical Information Manual, Chapter 3 covers special use airspace; the Chart Supplement (a free FAA publication) provides operational specifics for every MOA, Restricted Area, and Warning Area in the country.