Category 3 Operations
Category 3 shares the same declaration-of-compliance structure as Category 2, but allows a higher injury-severity threshold in exchange for meaningfully tighter operating restrictions. Where Category 2 permits transient overflight of scattered non-participants, Category 3 restricts operations to closed or restricted-access sites, or to genuinely brief, non-sustained overflight, and it flatly prohibits flight over open-air assemblies with no Remote ID exception. This lesson covers the exact eligibility test of 14 CFR 107.130 and the operating requirements of 14 CFR 107.125.
What the remote pilot must confirm before relying on Category 3
Just as with Category 2, 14 CFR 107.125 requires the remote pilot in command to use an aircraft that is eligible for Category 3 under 107.130(a), that is listed on an FAA-accepted declaration of compliance, and that is labeled as eligible for Category 3 operations. The verification job is identical in structure to Category 2 — check eligibility, check the declaration, check the label — only the underlying regulation numbers and the specific threshold differ.
The aircraft eligibility test: the 25 foot-pound injury threshold
14 CFR 107.130(a)(1) sets the Category 3 injury-severity test at a transfer of 25 foot-pounds of kinetic energy upon impact — more than double the 11 foot-pound threshold for Category 2. This higher permitted threshold is precisely why Category 3 comes paired with tighter operating restrictions: the FAA allows a Category 3 aircraft to pose a somewhat greater impact risk than Category 2 in exchange for restricting where and how it may be flown over people. As with Category 2, this is an injury-severity test, not a weight limit — weight alone cannot establish Category 3 eligibility.
The remaining eligibility criteria and manufacturer obligations
As with Category 2, 107.130(a) also requires no exposed rotating parts that would lacerate human skin upon impact and no safety defects. 107.130(b) places the same three obligations on the manufacturer as Category 2: a legible, prominent, permanently affixed label in English stating Category 3 eligibility; operating instructions covering the system, allowable modifications, and configuration verification; and product-support notification procedures. One meaningful difference: Category 3's defect-notification standard is tied to any identified safety defect that causes the aircraft to exceed a low probability of fatality, a stricter threshold than Category 2's low probability of casualty language, reflecting the higher stakes of the greater permitted impact energy.
Operating restriction one: open-air assemblies are prohibited outright
This is the single most important distinction from Category 1 and Category 2. 14 CFR 107.125 flatly prohibits operating a Category 3 aircraft over an open-air assembly of human beings — there is no Remote ID exception, no compliance pathway, no way to make this legal for a Category 3 aircraft. A dense outdoor crowd is simply off-limits for Category 3, full stop.
Operating restriction two: the closed/restricted-access-site or no-sustained-flight rule
For flight over non-participants who are not part of an open-air assembly, 107.125 permits it only under one of two conditions. First, the operation may occur within a closed- or restricted-access site, provided all human beings located within that site are on notice that a small unmanned aircraft may fly over them — typically achieved through posted signage, briefings, or similar notification at the site's entry points. Second, outside such a site, the aircraft must not maintain sustained flight over people unless those people are directly participating in the operation, or are located under a covered structure or inside a stationary vehicle that can provide reasonable protection from a falling aircraft. Brief, transient overflight of non-participants who are out in the open, at a site with no notice given, is not permitted under Category 3.
- Closed/restricted-access site: All human beings inside must be on notice that overflight may occur.
- No sustained flight (outside such a site): Unless people are participants, or are under a covered structure or inside a stationary vehicle.
Category 3: permitted inside a closed/restricted-access site with notice, but flatly prohibited over any open-air assembly.
View LargerScenario: inspecting a fenced construction site with workers present
A remote pilot is hired to fly weekly progress photos over an active, fenced construction site using a Category 3-declared aircraft, since the site's access-controlled perimeter and posted safety signage already put every worker on notice that overhead operations occur regularly. Because the site qualifies as a closed- or restricted-access site under 107.125, and workers are on notice, sustained flight over the site is permitted. If the same pilot were later asked to use the identical aircraft to photograph a public street festival two blocks away, where a dense, open-air crowd has gathered with no restricted access and no notice given, the operation would not be legal under Category 3 at all — that is a prohibited open-air assembly, and no amount of careful flying or brief transiting changes that outcome for this category.
Category Classifier Helper
Confirming Category 3 eligibility and site restrictions before a job
Category 3 verification has an extra layer beyond aircraft eligibility: the site itself must also qualify.
Confirm the aircraft's Category 3 label and declaration of compliance
Verify the label is present, legible, prominent, and permanently affixed, in English, and stated as Category 3, and confirm the aircraft is in its declared, unmodified configuration.
Rule out any open-air assembly along the flight path
Scan the entire planned flight path for any dense, stationary gathering of people outdoors. If one exists anywhere along the route, Category 3 cannot be used for that portion of the flight under any circumstances.
Determine whether the site qualifies as closed or restricted-access, with notice
Confirm the site has controlled access and that everyone inside has been given notice that overhead drone operations may occur — through signage, briefings, or another reliable method.
If the site does not qualify, plan for no sustained flight over non-participants
Outside a qualifying closed/restricted-access site, plan the flight path so it does not maintain sustained flight over anyone who is not a participant and not under covered protection or inside a stationary vehicle.
| Mistake | Why it happens | Correct understanding | Regulation / source |
|---|---|---|---|
| Assuming Category 3 can fly over a crowd if the aircraft also has Remote ID | Categories 1, 2, and 4 all use a Remote ID compliance pathway to permit sustained flight over an open-air assembly, creating an expectation Category 3 works the same way | Category 3 has no such exception — open-air assemblies are prohibited outright, regardless of Remote ID equipment | 14 CFR 107.125 |
| Confusing the Category 3 injury threshold (25 ft-lbs) with the Category 2 threshold (11 ft-lbs) | Both categories use the same declaration-of-compliance structure and are easy to mix up under time pressure | Category 3 permits a higher injury-severity threshold (25 ft-lbs) than Category 2 (11 ft-lbs), paired with tighter operating restrictions | 14 CFR 107.130(a)(1); 14 CFR 107.120(a)(1) |
| Believing a closed/restricted-access site qualifies automatically, with no notice needed | "Closed site" sounds like it inherently means people are aware operations occur there | All human beings located within the site must actually be on notice that a small unmanned aircraft may fly over them — restricted access alone is not sufficient without notice | 14 CFR 107.125 |
| Thinking a single brief pass over a non-participant outside a qualifying site is automatically fine because it is not "sustained" | The rule's language focuses on sustained flight, which invites treating any brief overflight as automatically permitted | Outside a qualifying closed/restricted-access site, non-sustained overflight of non-participants is only permitted if they are under covered protection or inside a stationary vehicle — an exposed bystander is not automatically covered just because the pass is brief | 14 CFR 107.125 |
Can a Category 3 aircraft ever fly over an open-air assembly with Remote ID equipped?
No. Unlike Categories 1, 2, and 4, Category 3 has no Remote ID exception for open-air assemblies. Flight over an open-air assembly is prohibited outright for Category 3, regardless of the aircraft's Remote ID equipment.
What makes a site qualify as "closed or restricted-access" for Category 3 purposes?
The site must have controlled access, and every human being located within it must be on notice that a small unmanned aircraft may fly over them, typically through posted signage or a briefing at entry points.
Why does Category 3 allow a higher injury threshold than Category 2 if it is riskier per impact?
The FAA offsets the higher permitted impact energy with meaningfully tighter operating restrictions — the open-air assembly prohibition and the closed-site/no-sustained-flight requirement — so the overall operation still keeps risk to non-participants controlled.
Test Your Knowledge
Answer the questions below to check your understanding. Every answer can be found in the lesson above.