OPSC OAS 2021 PrelimsScience & TechnologyQuestion 3
Solved previous year question from the OPSC OAS/OCS 2021 Preliminary Examination (General Studies), with the official answer key and a detailed explanation.
Question
Beyond Visual Line of Sight is an experiment, associated with which of the following device?
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Answer & Explanation
Correct answer: (B) Unmanned Aerial Vehicles
- BVLOS is primarily related to drones or unmanned aerial vehicles (UAVs) that are operated at distances where the pilot cannot see them directly, relying on sensors or cameras for control.
Types of Drone Operations Based on Visual Range
| Type | Full Form | Details |
|---|---|---|
| VLOS | Visual Line of Sight | The operator can directly see the drone at all times. Most common and basic form of drone operation. |
| EVLOS | Extended Visual Line of Sight | The drone flies beyond the direct visual range of the pilot but is monitored by additional visual observers stationed along the flight path. |
| BVLOS | Beyond Visual Line of Sight | Drone operates completely beyond the visual range of the operator. Relies on technology for navigation, communication, and obstacle avoidance. |
Why is BVLOS important?
- VLOS capability is considered a game-changer because it vastly expands the operational range and utility of drones. Without BVLOS, drones are limited to a few hundred metres of visual range, restricting their applications.
