Military Operations Areas, the Active MOA Question Every Cross-Country Pilot Has to Answer, and the Inflight Call That Tells You Whether to Transit or Go Around

Those magenta hash marks on the sectional look almost harmless - a shaded zone with a name along the border. But a Military Operations Area can contain F-16s pulling 6 Gs at low altitude, and the closure rate between a high-performance military jet and a Cessna 172 doesn’t care about regulatory nuances. Understanding MOA rules isn’t just checkride prep - it’s how you make the right call on every cross-country.

What Is Special Use Airspace?

The FAA defines special use airspace as airspace where activities must be confined because of their nature, or where limitations are imposed on aircraft not participating in those activities. There are six types, and the Airman Certification Standards require knowledge of all of them. Most appear regularly on cross-country routes throughout the continental United States.

The Six Types of Special Use Airspace

Prohibited Areas are marked with a P followed by a number. They cover sensitive government facilities, critical national security sites, and protected national landmarks. Entry requires specific authorization, and there is no “inactive” status to check - Prohibited Areas are always in effect. Route around them. No exceptions.

Restricted Areas, marked with an R, protect airspace where hazardous activities like artillery fire, missile testing, or aerial gunnery may extend into the surrounding airspace. Restricted Areas can be either active or inactive. When inactive, VFR flight is permitted under standard conditions. When active, you need authorization from the controlling agency before entry.

Warning Areas, marked with a W, look similar to Restricted Areas on charts but lie in international airspace beginning 3 nautical miles offshore. Because the FAA’s regulatory authority doesn’t fully extend over international waters, VFR flight cannot be legally prohibited there. The hazards inside - missile testing, gunnery, high-performance military training - are identical to those in a Restricted Area. Treat an active Warning Area accordingly.

Alert Areas, marked with an A, indicate a high volume of pilot training or unusual aerial activity that demands attention. Areas near large flight academies, active aerobatic zones, or heavy helicopter training regions commonly carry this designation. The activity inside is legal and authorized - it’s just not predictable. Fly through with an aggressive traffic scan and full see-and-avoid vigilance.

Controlled Firing Areas are the one type that does not appear on sectional charts at all. All activities within them are automatically suspended whenever a spotter aircraft, radar, or ground lookout detects a non-participating aircraft that might be affected. They watch out for you. No chart marking, no pilot action required.

Military Operations Areas are where most of the real-world complexity lives.

What Is a Military Operations Area?

A Military Operations Area (MOA) is designated for military flight training - including low-altitude tactical flying, aerial combat maneuvering, formation training, supersonic flight, and aerobatics. These are among the most dynamic environments below 18,000 feet, with high-performance aircraft at speeds and altitudes that can change dramatically within seconds.

MOAs appear on VFR sectionals as a magenta hatch pattern. On IFR low-altitude en route charts, the same boundaries appear with a yellow hatch. Each MOA’s name is printed inside or along its border. Looking that name up in the chart supplement (formerly called the Airport Facility Directory) gives you the floor altitude, ceiling altitude, times of use, and the controlling agency.

Can You Legally Fly Through an Active MOA?

This is where many pilots arrive at the wrong answer. There is no regulation in FAR Part 91 that prohibits a VFR pilot from flying through an active MOA. The FAA cannot legally prohibit VFR flight in airspace that doesn’t require an IFR clearance.

What the regulations and the Aeronautical Information Manual (AIM) actually say: when flying VFR through an active MOA, pilots should exercise extreme caution and should contact the controlling agency for traffic advisories before entering. “Should” - not “are prohibited,” not “are required to avoid.”

The physics don’t honor that distinction. An F-16 at low altitude and high speed doesn’t need to be doing anything wrong to present a lethal threat to a Cessna 172. The closure rate alone is the problem. The absence of a legal prohibition is not a reason to transit without coordination.

How Do You Check Whether a MOA Is Active Before Your Flight?

Three methods cover this reliably during preflight planning.

Method 1: Official weather briefing. When you contact Leidos Flight Service - by phone at 1-800-WXBRIEF or through their online portal - your briefing includes NOTAM information. If a MOA is activated by NOTAM for your flight window, it should appear there. Ask specifically for airspace NOTAMs along your route to confirm they’re included.

Method 2: Your EFB. Apps like ForeFlight show MOA activation status, often color-coded by time window, with near-real-time data when available from official sources. Use your EFB for situational awareness and planning, but always back it up with an official briefing. The app is your awareness layer. The official briefing is your documented preflight action.

Method 3: Call the controlling agency directly. The controlling agency is listed in the chart supplement for every MOA. Call them. Ask whether the MOA will be active during your planned window. A typical call takes under two minutes and gives you the most current information possible from the people who actually schedule that airspace.

What Do You Do If a MOA Is Active While You’re En Route?

If you’re approaching a MOA without pre-coordination, contact the Air Route Traffic Control Center (ARTCC) sector covering that area on the en route frequency and ask about MOA status. You can also contact Flight Service on 122.2, or reach the controlling agency directly on the frequency listed in the sectional’s legend block for that MOA.

When ATC responds with “use extreme caution, the MOA is active,” understand exactly what that means: that is information, not a clearance to enter. ATC is reporting status and placing the decision in your hands as pilot in command. “Use caution” is a hazard advisory. It is not a green light.

In practice: if the MOA is active, plan around it. Deviating around the boundary rarely adds more than 10 to 15 minutes to a flight. That’s a far better outcome than a midair encounter with an aircraft you never saw.

The one scenario where transiting an active MOA makes operational sense: you’ve contacted the controlling agency, they know you’re inbound, and they’ve confirmed no conflicts with their traffic for your altitude and window. That’s a coordinated transit - very different from deciding that things will probably be fine.

How Do MOA Floor and Ceiling Altitudes Work?

Every MOA has published floor and ceiling altitudes in the chart supplement. One MOA might run from the surface to but not including Flight Level 180. Another might run from 5,000 feet MSL to 12,000 feet MSL. Those altitudes define the legal extent of the special use airspace.

Flying below the floor means you’re legally outside the MOA. The practical caveat: military aircraft transitioning in and out of MOA altitudes will briefly be above and below the charted limits. A fighter climbing into the MOA from below is momentarily at your altitude before it enters the designated block. Below the floor is outside the formal airspace definition - it is not automatically free of military traffic.

What Does “Continuous” vs. “Other Times by NOTAM” Mean?

A MOA charted as “continuous” does not mean it’s always active. It means the MOA can be activated at any time without advance NOTAM. You cannot assume it’s inactive simply because no activation NOTAM appears in your briefing. Verification with the controlling agency is required.

A MOA charted as “other times by NOTAM” means it is only activated when a specific NOTAM is issued for that purpose. Check your NOTAMs for the flight window - if there’s no activation NOTAM for that area in your time slot, the MOA is inactive. A confirming call is still good practice, but the NOTAM picture is definitive for this type.

How Should You Handle MOAs on a Checkride?

The Airman Certification Standards address special use airspace directly in cross-country planning and navigation. Examiners regularly select practice routes that touch or cross a MOA, then ask you to walk through how you’d handle it.

“I’d call them” is not a complete answer. A complete answer sounds like this: “I’d contact the controlling agency on the frequency listed in the chart supplement, verify activation status for my window, and if active, I’d reroute north of the boundary and add about 12 minutes to my flight time.” That’s the difference between someone who memorized the material and someone who’s thought through the actual flight.

Know the name of the MOA, the controlling agency, the contact frequency, and the floor and ceiling altitudes. Know the chart supplement well enough to pull all of it under time pressure. Examiners are looking for the operational layer - not just the regulatory definitions.

During your preflight briefing, the NOTAM section and airspace summary are easy to skim past when you’re focused on the weather picture. Build the habit of reading that section carefully. The specific language of an activation NOTAM tells you the floor, the ceiling, and the window. That three-minute read is worth the time.

Key Takeaways

• MOAs are not legally prohibited airspace for VFR pilots, but active MOAs contain serious hazards - the regulations don’t override physics.
• Check MOA activation status through your official preflight briefing, your EFB, and ideally a direct call to the controlling agency listed in the chart supplement.
• When ATC says “use extreme caution, the MOA is active,” that is a hazard advisory - not permission to proceed.
• A “continuous” MOA can be activated without advance NOTAM; never assume inactive status without verification.
• On a checkride, demonstrate the full operational sequence: identify the MOA by name, locate the controlling agency in the chart supplement, state the frequency, and describe exactly what you’d do if it’s active during your flight window.