BVLOS Fundamentals & Flightpath Planning Flashcards

What does BVLOS stand for in drone operations?

Answer: Beyond Visual Line of Sight

BVLOS — Beyond Visual Line of Sight — refers to drone operations where the pilot cannot maintain unaided direct visual contact with the drone. BVLOS operations are in the specific or certified category and require additional mitigations such as ground observers, detect-and-avoid systems, and CAA authorisation.

What is the primary technical challenge in enabling safe BVLOS drone operations?

Answer: Detect and Avoid (DAA) — ensuring the drone can detect and avoid conflicting traffic without the pilot seeing the airspace

In VLOS operations, the pilot's eyes provide the detect-and-avoid function. In BVLOS, this function must be provided by technology (onboard sensors, radar, ADS-B receivers) or procedural means (ground observers, traffic management systems) to prevent mid-air collisions.

When planning a commercial drone flightpath, what is the significance of identifying 'emergency landing sites'?

Answer: Pre-planned emergency landing sites allow the pilot to quickly direct the drone to a safe location in the event of a technical failure or other emergency

Pre-identifying safe emergency landing sites along the planned route is a key element of professional flightpath planning. In the event of a technical failure, loss of communication, or unexpected hazard, the pilot can execute a pre-planned emergency landing rather than making an uncontrolled forced landing in an unsafe area.

What role does a Ground Observer (GO) play in a commercial VLOS drone operation with multiple crew?

Answer: The GO maintains visual contact with the drone and communicates traffic or hazard information to the remote pilot

A Ground Observer extends the pilot's situational awareness, particularly useful in complex environments with obstructions or multiple hazards. The GO focuses on maintaining visual contact with the drone and monitoring for approaching aircraft, people, or obstacles, relaying this information to the pilot in real time.

What is the purpose of a 'flight plan' in the context of a commercial GVC drone operation?

Answer: To document the intended route, altitude, timing, contingency procedures, and emergency actions before the flight takes place

A commercial flight plan is a pre-flight planning document that captures all the key operational details: the intended route and altitude, airspace considerations, timing, crew responsibilities, contingency actions if something goes wrong, and emergency procedures. It is a tool for safe operations, not primarily a regulatory submission.

Why is it important to identify overhead power lines and pylons when planning a commercial drone flightpath?

Answer: Power lines are difficult to see and detect electronically; striking them can cause loss of the aircraft, fire, and power outages affecting large areas

Power lines and pylons are among the most hazardous obstacles for low-level drone operations. They are often difficult to spot visually and are not reliably detected by standard drone sensors. Striking a high-voltage line can destroy the drone, cause a fire, and cut power to homes and businesses — consequences far beyond loss of the aircraft.