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Which of the following statements with regard to drone swarms is/are correct?
1. They use Terahertz band of frequency to communicate with the command centre.
2. Individual drones in the swarm can communicate with other drones in the swarm.
3. GPS Spoofing is a commonly used technique to counter drone swarm attack.
Select the answer using the code given below:
Explanation
Statement 1 is incorrect: Drone swarms typically use standard radio frequency (RF) bands (such as UHF, VHF, or ISM bands) or satellite communication for long-distance links with a command centre. The Terahertz (THz) band suffers from severe atmospheric attenuation, restricting it to ultra-short-range communications, making it unsuitable for long-range command centre links.
Statement 2 is correct: The defining characteristic of a drone swarm is "swarm intelligence." Individual drones are equipped with mesh networking capabilities, allowing them to communicate with one another, share real-time data, and autonomously coordinate their flight paths and mission objectives without relying solely on central control.
Statement 3 is correct: GPS spoofing is a widely used Counter-Unmanned Aircraft System (C-UAS) electronic warfare technique. By broadcasting fake GPS signals that overpower genuine satellite signals, defenders can deceive the navigation systems of attacking drones, causing them to deviate from their intended targets, hover aimlessly, or crash.
PROVENANCE & STUDY PATTERN
Guest previewThis is a classic Science & Tech current affairs bouncer mixed with applied physics. While inter-drone communication and GPS spoofing are intuitive if you follow defense tech news, the Terahertz band statement is a technical trap designed to test your understanding of electromagnetic spectrum limitations.
This question can be broken into the following sub-statements. Tap a statement sentence to jump into its detailed analysis.
- Directly identifies the specific frequency band used for communication between a drone swarm and its Ground Control Station (GCS).
- Explains the architecture where a specific frequency is used for flight control commands and data transmission.
- Published in May 2026, aligning with the exam year context.
- Discusses the frequency ranges (2.4-5.8 GHz) commonly targeted for disrupting drone swarm communication and control systems.
- Confirms that these high-frequency fields are the standard operating range for drone swarm control protocols.
- Provides context on the electromagnetic environment of autonomous drone swarms.
- Official government document (BSF) specifying technical requirements for countering drone swarms.
- Mentions the use of wideband detection and multiband switching systems to neutralize advanced UAS/swarms.
- Highlights that command and control centers must manage responses across these frequency bands.
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