6 Step EU Preflight Checklist for Open Category Drones

The EU Open category covers low-risk drone operations that need no prior authorization, but it comes with fixed limits: visual line of sight, a 120-meter altitude ceiling, no dropping objects, and a maximum takeoff mass under 25 kg. Every flight falls into subcategory A1, A2, or A3, based on the drone’s class mark or weight. Before takeoff, check your drone’s C-class label or weigh it, then confirm your local geo-zones.

• Drones in the open category must not exceed 25 kg MTOM, fly within visual line of sight, and stay below 120 meters altitude unless authorized otherwise.
• Flying over uninvolved people is allowed only for lightweight drones in A1 mode, while A2 requires a minimum distance of 30 meters unless a special certificate is obtained.
• All flights require compliance with geo-zone restrictions, remote ID broadcasting, and a thorough preflight check that confirms drone class, operator registration, and airspace conditions.
• Dropping objects or carrying dangerous goods is prohibited across all open subcategories, and flights over assemblies of people are forbidden regardless of drone weight or classification.
• Operator responsibilities include ongoing airspace data updates and maintaining drone registration, while remote pilots must hold valid certificates and conduct safety checks before each flight.

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Table of Contents

• What Does the EU Open Category Mean for Drones?
• Which Open Subcategory Fits Your Drone: A1, A2, or A3?
• What Are the Technical Limits and Prohibitions?
• Who’s Responsible: The Operator or the Remote Pilot?
• What Training Do You Need for A1, A2, or A3 Certificates?
• How Do You Run a Compliant Preflight Check?
• Where Do Most Pilots Actually Get Caught Out?
• Keep Compliance Automated Instead of Manual
• Where to Verify the Official Rules
• Sources
• FAQ

What Does the EU Open Category Mean for Drones?

The Open category exists for operations judged low risk enough to skip individual authorization or a formal declaration. That framework comes directly from Implementing Regulation (EU) 2019/947, which defines the category, splits it into subcategories A1, A2, and A3, and sets the baseline rules every Open flight has to follow.

The regulation pairs with Delegated Regulation (EU) 2019/945, which defines the C0 through C4 class marks that manufacturers stamp on new drones. Those marks, not the operator’s judgment, determine which subcategory a drone belongs to.

“No prior authorization” doesn’t mean “no rules.” National authorities still designate geo-zones that restrict or ban flights for safety, security, or privacy reasons, and pilots stay bound by them regardless of category. The 25 kg MTOM ceiling is absolute. Heavier drones, or flights that need to go beyond VLOS or above 120 meters, fall outside Open and into the specific category, which does require a risk assessment or an operational authorization.

Which Open Subcategory Fits Your Drone: A1, A2, or A3?

Your drone’s C-class mark, or its weight if it predates class marking, decides which subcategory you’re flying under. Get this wrong and you’re not just breaking a technicality. You’re potentially flying over people or property you have no legal right to overfly.

• A1: Class C0 (under 250 g) or C1 (under 900 g) drones. Flight over uninvolved people is allowed, though not over crowds or assemblies of people.
• A2: Class C2 drones (under 4 kg). Requires a minimum horizontal distance from uninvolved people, reducible to 30 meters (or 5 meters in low-speed mode) with the A2 certificate.
• A3: Class C3 or C4 drones (under 25 kg), or legacy drones without any class mark. Must be flown at least 150 meters from residential, commercial, industrial, or recreational areas, and away from uninvolved people entirely.
• Legacy/privately built drones: No class mark means default placement in A3, with weight-based limits still applying under transitional rules that took full effect in January 2024.

(Note: No suggestions to change “over crowds” to “overcrowds” were confidently applicable, as the latter could alter the tone or clarity.)

The practical logic runs from lowest risk to highest tolerance for proximity: A1 lets you fly near people with a light drone, A3 pushes you away from people and buildings entirely because the drone is heavier or unclassified, as explained in this drone wedding photography hiring guide. A2 sits in between, and it’s the subcategory that trips up the most new pilots, since it demands an extra certificate beyond the basic one.

What Are the Technical Limits and Prohibitions?

Every Open category flight, regardless of subcategory, operates inside the same technical envelope. You keep the drone within visual line of sight, or use a trained observer who maintains it for you. Maximum altitude is 120 meters above ground level, with narrow exceptions for flying over tall obstacles. Dropping any material and carrying dangerous goods is prohibited outright, with no subcategory exception.

Remote ID matters more than most new pilots realize. Class C1 through C3 drones must broadcast direct Remote ID, transmitting the operator registration number so authorities and other airspace users can identify who’s flying. That number also needs to be physically marked on the drone itself and uploaded into the relevant registration system.

Geo-awareness isn’t optional, and it isn’t static. Geo-zone maps change as national authorities add or lift restrictions, and the responsibility to check the current version before every flight sits with the operator, not the software vendor.

Prohibited actions across all Open subcategories:

• Dropping objects or material from the drone.
• Carrying or discharging dangerous goods.
• Flying over assemblies of people, regardless of subcategory.
• Flying beyond VLOS or above 120 meters without a specific-category authorization.

Who’s Responsible: The Operator or the Remote Pilot?

EASA draws a firm line between two roles that often overlap in practice but carry distinct legal weight. The operator holds continuing legal responsibility for the drone and its use, even on days when someone else is holding the controller.

Operator duties:

• Register with the national aviation authority and display the registration number on the drone.
• Upload the operator ID for Remote ID broadcast where required.
• Develop and follow operating procedures for the drone in use.
• Keep geo-awareness maps and airspace data current before every flight.
• Confirm the drone meets its declared class conformity.

Remote pilot duties:

• Complete the training and hold the certificate required for the subcategory being flown.
• Run preflight checks on the airframe, battery, and links before launch.
• Confirm personal fitness to fly, meaning no alcohol, fatigue, or medication that impairs judgment.
• Give way to manned aircraft at all times.

Many hobbyists assume that once they’ve registered once, they’re covered indefinitely. Operators often underestimate that this is a continuing obligation, not a one-time checkbox, particularly around keeping airspace data current. Flydronable’s operations manual tools exist partly because this split of duties confuses people who fly solo and never separate the two roles in their head.

What Training Do You Need for A1, A2, or A3 Certificates?

A1 and A3 share the same entry point: an online training course followed by a theoretical exam, both completed through your national aviation authority’s approved system. Pass that, and you’re cleared for A1 and A3 operations together, since A3 sets no additional flight distance requirement beyond what you already know.

A2 asks for more. You need the A1/A3 certificate first, then additional theoretical training covering topics like meteorology and flight performance, a further exam, and a signed practical self-training declaration confirming you’ve flown the relevant maneuvers yourself.

Certificates are generally valid for five years before revalidation is required. Training and exams happen through each EASA member state’s designated system, and while certificates are recognized across EASA states, some administrative specifics vary by country. Check your own national aviation authority before assuming a course from one state transfers seamlessly everywhere.

How Do You Run a Compliant Preflight Check?

A repeatable preflight routine catches the mistakes that regulations exist to prevent. Run through this before every flight:

1. Confirm your drone’s subcategory (A1, A2, or A3) based on its class mark or weight.
2. Verify the operator ID is marked on the airframe and uploaded for Remote ID.
3. Check that Remote ID broadcast is active, if your drone class requires it.
4. Pull up current geo-zone data for your exact flight location.
5. Confirm your remote pilot certificate is valid and not expired.
6. Run standard preflight safety checks: battery, props, firmware, control link.

Automated geo-overlays, certificate storage, and flight-log tools cut down the manual re-checking that leads to skipped steps. A platform that stores your certificate expiry date and flags it automatically removes one entire category of accidental noncompliance.

Pro Tip: Geo-awareness maps and drone firmware both update on their own schedule, not yours. Check both again right before launch, not just the night before.

Where Do Most Pilots Actually Get Caught Out?

The recurring failure isn’t ignorance of the rules. It’s treating geo-awareness maps as something you check once and forget, and assuming a drone’s subcategory without ever confirming its class mark. Automated preflight checks that pull live geo-zone data fix both problems at once, because they remove the memory lapse from the equation.

Keep Compliance Automated Instead of Manual

Flydronable replaces the spreadsheet-and-sticky-note approach to compliance with one workspace that tracks it for you. SkyScore™ checks airspace conditions before you fly, so you’re not manually cross-referencing geo-zone maps against your GPS coordinates every time you launch.

The platform also stores your remote pilot credentials through Drone Passport, logs your flights automatically, and keeps your Remote ID and operator registration details in one place instead of scattered across apps and paper files. If you fly commercially, Deal Studio adds client proposal and payment tools on top, so the compliance side and the business side live in the same system. Plans start with Starter at $9.99 per month, scaling up to Pilot Pro and Elite for pilots who need the full asset library and advanced compliance tools. Check the membership tiers and pick the one that matches how often you fly.

Where to Verify the Official Rules

Regulatory text changes, so verify directly at the source rather than relying on secondhand summaries.

• Implementing Regulation (EU) 2019/947 for the Open category’s legal text.
• Delegated Regulation (EU) 2019/945 for C0–C4 class definitions.
• EASA’s Open category page for current guidance.
• Your national aviation authority for country-specific geo-zone maps.

This article is general information, not a substitute for advice from a qualified lawyer. Consult a qualified legal professional about your own circumstances before acting on anything here.

Sources

• Open Category — Low Risk — Civil Drones | EASA
• COMMISSION IMPLEMENTING REGULATION (EU) 2019/947
• DELEGATED REGULATION (EU) 2019/945

FAQ

What Are the Four Categories of Drones?

EU drone regulation splits operations into Open, Specific, and Certified categories, with Open further divided into three subcategories: A1, A2, and A3. Open covers low-risk flights with no prior authorization, Specific category drones require a risk assessment or authorization for higher-risk operations, and Certified applies to operations comparable to manned aviation risk.

What Do the A1 and A3 Open Subcategories Allow?

A1 permits flying lightweight drones (C0 or C1 class, generally under 900 g) over uninvolved people, though never over crowds. A3 applies to heavier drones up to 25 kg or unclassified legacy drones, and requires staying at least 150 meters from residential and populated areas.

Is It Legal for My Neighbor to Fly a Drone Over My House?

Under Open category rules, flights over private property aren’t automatically prohibited, but pilots must respect geo-zone restrictions, avoid flying over uninvolved people beyond what their subcategory allows, and follow national privacy and nuisance laws that sit outside aviation regulation. Persistent or intrusive flights over a specific residence can trigger separate privacy or harassment complaints handled by local authorities rather than aviation rules alone.

Can You Drop Objects From a Drone in the Open Category?

No. Dropping any material from a drone is prohibited across the entire Open category, regardless of subcategory, drone class, or the object’s size or weight. Carrying dangerous goods is banned under the same rule.

Do I Need Different Certificates for A1, A2, and A3?

A1 and A3 share one certificate earned through online training and a theory exam. A2 requires that same certificate first, plus additional training, a further exam, and a practical self-training declaration, and certificates generally stay valid for five years before revalidation.

Recommended

• Operations Manual