Treat the EASA A1/A3 and A2 theory exams as tests of applying the open-category framework to concrete flights. Decide the subcategory first, then the people rule, then the height and zone checks. The sections below compare A1, A2 and A3 side by side, work through two realistic flight decisions, and give you a practice drill with a self-check rubric plus a preparation sequence you can compress or stretch.
A1, A2 and A3: deciding which subcategory a flight actually belongs to
Under the EASA open category, the three subcategories are ranked by risk to uninvolved people: A3 is the most restrictive about people, A2 allows reduced distances, A1 is the only one permitting flight over uninvolved people, and only with the lightest aircraft.
The logic behind the split is injury risk. A1 accepts that very light aircraft may operate near or over uninvolved people; A2 requires the remote pilot to maintain a minimum horizontal separation from uninvolved people, shaped by distance requirements and speed modes; A3 confines flights to areas where uninvolved people are not reasonably expected to be present. The aircraft's class mark and the environment together decide which subcategory a flight falls into, not the pilot's preference or the certificate they happen to hold.
This ordering matters when you study because every individual rule hangs off a subcategory decision. If you memorise the height ceiling or the registration duty as free-floating facts, you cannot answer a scenario question, because the question is really asking: which subcategory is this flight in, and what does that subcategory allow? Practise reading a location description, matching it to the aircraft, and naming the subcategory aloud before touching any limit. Rebuild the table below from memory repeatedly; if you can reconstruct it without notes, practice scenarios reduce to a two-step lookup rather than a search through everything you have read.
| Subcategory | Where the flight happens | Uninvolved people rule | Typical aircraft basis |
|---|---|---|---|
| A1 | Urban and populated areas permitted | Flight over uninvolved people only with the lightest aircraft; other A1-class aircraft keep low proximity but do not overfly | Lightest class marks, e.g. C0-class aircraft, plus the smallest private-built drones |
| A2 | Populated areas, with distance discipline | Minimum horizontal separation from uninvolved people, tightened or relaxed by the aircraft's speed mode | Mid-class aircraft designed for reduced-distance operation, e.g. C2-class |
| A3 | Sparsely populated areas, away from people | No uninvolved people in the operating area; the area must be one where their presence is not expected | Larger open-category aircraft, e.g. C3- and C4-class, plus others under conditions |
Worked scenario: the village guesthouse shoot where the wrong subcategory looks legal
A rural setting does not automatically mean A3. If uninvolved people can pass through your operating area, the A3 condition of an area without expected uninvolved people fails, and the flight must fit A2 or A1 rules instead.
Scenario: you hold an A1/A3 remote pilot certificate and a C2-class aircraft. A client wants photographs of a small guesthouse in a village. You plan to hover near the building while a delivery driver, a guest walking to a car, and a neighbour cross the lane. The plausible mistake is reasoning that a village is 'sparsely populated', therefore A3 applies and the A1/A3 certificate covers the flight. The decision is wrong twice: the passing people make the area one where uninvolved people are expected, so the A3 condition fails, and a C2 aircraft operated close to uninvolved people is an A2 flight, which an A1/A3 certificate does not authorise.
The better decision has two legitimate branches: either reposition the flight so the operating area genuinely contains no uninvolved people, such as an open field with a clear view of the guesthouse, keeping the flight inside A3 conditions with the certificate you hold; or complete the additional training for the A2 certificate and operate under A2, maintaining the required horizontal separation from every uninvolved person. Why it matters: the certificate and the subcategory must match, and a rural label never overrides the people condition. Whenever a scenario mentions people who could move through the area, ask whether their presence is 'expected' rather than whether the district sounds rural.
Class marks C0 to C4: what the label on your drone actually unlocks
A drone's class mark determines which open-category subcategories it may be flown in. The lightest class marks support A1; the mid class supports A2 operation; the larger classes are A3 material under the framework.
Each class mark corresponds to design requirements such as maximum mass, speed and energy, which is why the mark rather than the pilot decides the available subcategories. A C0-class aircraft can be the basis for A1 flights including, under the framework's conditions, flight over uninvolved people; a C2-class aircraft is the A2 workhorse; C3- and C4-class aircraft belong to A3. The mark is fixed by design, so a heavier drone cannot be 'flown more carefully' into a subcategory it does not qualify for. Where drones without a class mark are flown, the framework has relied on mass-based conditions instead, so a small unmarked drone may be treated comparably to a light class for subcategory purposes.
Study the mapping in both directions, mark to subcategory and subcategory to mark, because practice scenarios can hand you either one. A productive check: pick three drones you have actually seen, state their likely class basis, and name the subcategories available for each. Also keep the class mark separate from the operator registration label: the class mark describes the aircraft's design category, while registration identifies the operator and is a distinct duty. When you write practice scenarios for yourself, deliberately name both, so you train yourself to track the two concepts independently.
A1/A3 versus A2: the additional exam deepens mitigation, weather and human factors
Both exams draw on the same open-category framework, but the A2 qualification adds knowledge aimed at operating closer to uninvolved people: operational mitigations, aircraft technical understanding, weather effects and human factors.
For the A1/A3 qualification, the framework centres on the open category's structure: the subcategories, their operating conditions, the height ceiling, registration and operator duties, and the basic rules of the air relevant to low-level drone flight. For A2, the additional training extends into why close-to-people operation can be made acceptably safe: technical checks and maintenance awareness, performance factors such as battery condition and weight effects, weather influences on the aircraft and on third-party risk, and human factors including the pilot's own limits.
The study implication is directional. A1/A3 preparation rewards drilling subcategory decisions and operating conditions until they are automatic. A2 preparation rewards reasoning about mitigation: given a wind shift, a degraded battery or a crowd drifting closer, what does the pilot change, and in what order? If you are sitting A2, build short cause-and-effect drills, such as how temperature and payload together change endurance, because the A2 material is about judgement under closeness, not a longer list of places you may fly. Keep the two qualifications on separate note pages with an arrow reading 'A2 = A1/A3 foundations plus mitigation topics' so they never blur into one undifferentiated pile.
Worked scenario: the 120 m ceiling measured on a slope, plus a zone near an airfield
The open-category height ceiling is measured relative to the closest point of the terrain beneath the drone, not the takeoff point. Geographic zones can further restrict or condition a flight regardless of subcategory.
Scenario: you launch from a hillside bench, fly downslope toward a valley, then climb until the drone sits well above your launch position but only modestly above the valley floor. A small airfield is also marked on your planning app a short distance beyond a wood. The plausible mistake is measuring height against the takeoff point and concluding the flight is compliant, while ignoring that the drone may be well above the closest ground beneath it, and ignoring the zone entirely. On sloping terrain these are genuinely different numbers, and the framework's height reference is the closer one.
The better decision: treat height as relative to the terrain under the drone's current position, which on slopes means the ceiling is effectively lower above rising ground than an altimeter relative to launch might suggest; and check geographic zones for the whole route, because a zone near an aerodrome can impose conditions even though the flight is otherwise a textbook open-category operation. Make it stick with a slope sketch: draw the hillside, mark the bench, the valley floor and a rising ridge, then trace the 120 m band above each surface point. The band visibly rises and falls with the terrain, which makes the 'closest point of the surface' definition intuitive.
Practice drill: ten location cards scored with a five-point rubric
Write ten short location cards, one per imagined flight. For each, state the subcategory, the aircraft basis, the governing people rule, the height reference issue and the zone check. Score with the rubric below.
Build the cards deliberately so they force decisions: a market square on a Saturday, an empty stubble field, a hillside above a hiking path, a residential street with a C2-class aircraft, a beach in low season with dog walkers appearing, a site adjacent to a small aerodrome. For each card, write four lines before looking anything up: which subcategory, which aircraft class basis fits, what the people rule requires, and whether terrain or a zone changes the height or the permission. Then check your answers against the framework and correct the card in a different coloured pen.
Score each card out of five: one point for the correct subcategory, one for a defensible aircraft basis, one for the people rule stated as a condition rather than a vague caution, one for flagging any terrain-height issue, and one for naming the zone check. Expected observations as you repeat the drill: by the third pass you should name the subcategory within roughly a minute without hesitation; by the fifth, the people rule should be the first thing you reach for; terrain-height flags should appear unprompted on any sloping card. Treat scores as learning milestones, not predictions. When you reach eight or more on every card, build a second deck swapping the aircraft, for example the same market square with a C0-class aircraft instead of a C2-class one; if the same location produces a different subcategory, your decision order is working.
An adaptable preparation sequence and readiness checks before you sit the exam
Run a sequence that front-loads subcategory and class-mark mapping, then scenario drilling, then the A2-specific mitigation topics if relevant, finishing with mixed question practice and targeted review of weak cards.
A sequence you can compress or stretch: start with two sessions rebuilding the A1/A2/A3 table and the class-mark mapping from memory; follow with two sessions producing and scoring your ten location cards; then one session on the height-reference slope sketch and one on geographic zones plus registration versus pilot duties. If you are sitting A2, add sessions on weather, technical awareness and mitigation reasoning, using cause-and-effect chains rather than lists. Finish with mixed practice questions from your national training provider, then re-score the hardest location cards until they score full marks.
Readiness checks before booking or sitting: you can reconstruct the subcategory table and class-mark mapping from a blank page; you can explain, in two sentences, why the same drone over the same street falls into different subcategories depending on its class; you can state what the height ceiling is measured against and sketch the slope band; you can articulate the difference between operator registration and remote pilot competency; and, for A2, you can walk through a mitigation decision, such as approaching weather or a drifting crowd, in a structured order. One administrative note: exam availability, languages, fees and booking sit with national aviation authorities and their designated organisations, so confirm those details directly with the EASA and your national authority.
References and further reading
Use these references to explore the concepts and check the latest information from the relevant organizations.