A2 CofC - Drone Certificate of Competency Technical Mitigations for Ground Risk Questions and Answers — Questions and Answers
Question 1: A remote pilot operating under an A2 CofC is using a C2-class drone near people. Which technical feature is specifically designed to allow for a reduction in the required horizontal separation distance from uninvolved people from 30 metres to 5 metres?
- A low-speed mode limited to a maximum of 3 m/s (Correct answer)
- A certified emergency parachute system
- Detachable propeller guards
- An advanced Return-to-Home (RTH) function
Correct answer: A low-speed mode limited to a maximum of 3 m/s
According to UK Civil Aviation Authority (CAA) regulations for the A2 (Near People) subcategory, a C2-class unmanned aircraft can be flown as close as 5 metres to uninvolved people, provided it is in a 'low-speed mode' which limits its maximum speed to 3 metres per second (m/s). This reduced speed is a key technical mitigation that lowers the potential impact energy in case of a failure, thus reducing ground risk.
Question 2: Which of the following best describes the role of a manufacturer's built-in geo-awareness system as a technical mitigation for ground risk in the UK?
- It is a legal requirement mandated by the CAA for all operations.
- It provides advisory information, but the remote pilot must always verify airspace restrictions using official sources like the UK AIP. (Correct answer)
- It automatically prevents the drone from entering any restricted airspace, removing the need for pilot checks.
- It is only designed to warn of other manned aircraft and has no function for ground-based restrictions.
Correct answer: It provides advisory information, but the remote pilot must always verify airspace restrictions using official sources like the UK AIP.
The UK CAA has issued safety notices (e.g., SN-2023/005) stating that pilots should not rely solely on manufacturers' geo-awareness or geofencing systems. These systems are an advisory tool, but the ultimate legal responsibility lies with the remote pilot to consult official, accurate sources such as the UK Aeronautical Information Publication (AIP) for all airspace restrictions. The manufacturer's data may not always be current or accurate.
Question 3: A remote pilot is planning an operation in a congested area and wants to minimise the ground risk to uninvolved persons. From a purely technical mitigation perspective, what is the primary safety benefit of using propeller guards?
- They significantly reduce the overall noise profile of the drone.
- They prevent the propellers from spinning in the event of a motor failure.
- They provide a physical barrier to reduce the severity of injury from direct contact with rotating propellers. (Correct answer)
- They improve the aerodynamic efficiency, allowing for longer flight times.
Correct answer: They provide a physical barrier to reduce the severity of injury from direct contact with rotating propellers.
The main purpose of propeller guards is to act as a physical shield. In the event of an incident where the drone comes into close contact with a person, the guards can prevent direct contact with the fast-spinning propellers, thereby mitigating the risk of lacerations and reducing the overall severity of potential injuries.
Question 4: While not mandatory for most A2 Open Category operations, an aftermarket ballistic parachute recovery system is considered a significant technical mitigation because it is designed to:
- increase the drone's flight time by providing lift.
- allow the drone to be legally flown over crowds in the Open Category.
- reduce the drone's rate of descent and impact energy in the event of a critical in-flight failure. (Correct answer)
- automatically navigate the drone back to the take-off point.
Correct answer: reduce the drone's rate of descent and impact energy in the event of a critical in-flight failure.
A ballistic parachute system is a safety feature designed to deploy in an emergency, such as a complete power or propulsion failure. Its function is to slow the aircraft's descent, which dramatically reduces the kinetic energy at impact. This lessens the potential for serious injury to people or damage to property on the ground. It does not, however, automatically grant permission to fly over crowds in the Open Category.
Question 5: You are operating a 1.8 kg 'legacy' drone (without a C-class marking) under your A2 CofC. You intend to fly in a park where members of the public are present. According to CAA regulations, what is the minimum horizontal separation distance you must maintain from uninvolved people?
- 30 metres, reducing to 5 metres in low-speed mode.
- 150 metres at all times.
- There is no minimum distance, but you must not intentionally overfly them.
- 50 metres, with no reductions permitted. (Correct answer)
Correct answer: 50 metres, with no reductions permitted.
For 'legacy' drones weighing between 500g and 2kg, the A2 CofC allows flight in the A2 subcategory but requires the remote pilot to maintain a minimum horizontal distance of 50 metres from uninvolved people. The technical mitigations that allow for reduced distances (like a specific low-speed mode) are features of C2-class drones and cannot be applied to legacy aircraft under the regulations.
Question 6: To operate in the A2 subcategory, a drone must have a UK C2 class marking (or equivalent). Which of the following is NOT a technical requirement or characteristic for a C2-class drone?
- It must be equipped with a system for Remote ID.
- It must have a maximum take-off mass of less than 4 kg.
- It must have adjustable noise reduction settings for urban environments. (Correct answer)
- It must be safely controllable, considering aspects like performance and stability.
Correct answer: It must have adjustable noise reduction settings for urban environments.
C2-class drones have a specific set of technical requirements defined in the regulations. These include having a maximum take-off mass under 4kg, being safely controllable, and being equipped with Remote ID and a geo-awareness system. While manufacturers may design for lower noise, adjustable noise reduction settings are not a specific mandatory technical requirement for the C2 classification itself.
A2 CofC - Drone Certificate of Competency Technical Mitigations for Ground Risk Questions and Answers
A remote pilot operating under an A2 CofC is using a C2-class drone near people.
Which technical feature is specifically designed to allow for a reduction in the required horizontal separation distance from uninvolved people from 30 metres to 5 metres?