Consider the following activities: 1. Spraying pesticides on a crop field 2. Inspecting the craters of active volcanoes 3. Collecting breath samples from spouting whales for DNA analysis. At the present level of technology, which of the above activities can be successfully carried out by using drones?
Contents17
- A1 and 2 only
- B2 and 3 only
- C1 and 3 only
- D1, 2 and 3
Show answer
Answer: (D) 1, 2 and 3
Drones are unmanned flying machines that have applications far beyond just military use.
Let's check each activity:
Statement 1 (Spraying pesticides) — CORRECT: Drones have been used to spray pesticides on crop fields. This was even tried in Telangana, India. While it had some legal issues in India, it is a proven technology and is legally practiced in many US states.
Statement 2 (Inspecting volcano craters) — CORRECT: Drones can fly into dangerous places where humans cannot go, like the craters of active volcanoes. Scientists use drones to study volcanic activity safely.
Statement 3 (Collecting whale breath samples) — CORRECT: Australian scientists flew drones about 200 metres above whale blowholes to collect their spray (mucus). This spray contains DNA, proteins, and bacteria, which helps scientists study whale health without disturbing them.
All three activities can be done by drones, so the answer is D.
Key Takeaway: Drones can do surprising things — from farming to volcano study to whale research. If a UPSC question asks about drone applications, think broadly!
Drones have moved beyond military use to civilian applications like precision agriculture, scientific research, and wildlife monitoring.
Around 2018-2020, multiple countries including India began exploring agricultural drone regulations, making civilian drone applications a relevant policy topic.
UPSC is testing whether students understand the broad technological capabilities of drones across different sectors, not just defense applications.
Drones in Agriculture
Science And Technology pesticides crop field spraying
Agricultural Drones: Spraying, Monitoring & Farm Applications
Drones can spray pesticides, fertilizers, and seeds with precision targeting
Telangana pioneered agricultural drone trials in India despite regulatory challenges
Agricultural drones reduce chemical usage by 30-40% through precise application
DGCA regulations now permit agricultural drone operations under specific conditions
Why Drones for Agriculture
Agricultural drones solve critical farming challenges through precision application and real-time monitoring. They can access difficult terrain, reduce chemical waste, and cover large areas quickly.
Precision spraying: Target specific crop areas, avoiding water sources
Cost efficiency: Reduce labor costs and chemical usage
Speed: Cover 8-10 acres per hour vs manual spraying
Agricultural Drone Applications
Application | Technology Used | Benefits | Current Status in India |
|---|---|---|---|
Pesticide Spraying | Liquid tanks + nozzles | Precise targeting, reduced exposure | Permitted under DGCA rules |
Crop Monitoring | Multispectral cameras | Early disease detection | Widely adopted |
Seed Sowing | Seed dispensers | Access to difficult terrain | Trial stage |
Fertilizer Application | Granule spreaders | Uniform distribution | Limited deployment |
India's Agricultural Drone Journey
Telangana government conducted first large-scale pesticide spraying trials in 2016-17
Initial legal challenges arose over pesticide application regulations and safety concerns
DGCA released drone regulations in 2021 permitting agricultural use with proper licensing
PM-Kisan Drone Scheme launched to subsidize agricultural drone adoption
Major players include Garuda Aerospace, ideaForge, and Throttle Aerospace
Trap: Assuming agricultural drones are still banned in India — they're now legally permitted under DGCA rules
Trap: Confusing crop spraying (active application) with crop monitoring (passive observation) — both are possible
Confusion: Agricultural drones vs military drones — completely different regulations and applications
Drones in Hazardous Scientific Research
Science And Technology volcano craters active volcanoes inspecting
Scientific Drones: Volcano Research & Hazardous Environment Exploration
Drones can safely inspect active volcano craters where humans cannot survive
Scientists use drones to collect gas samples, thermal data, and visual imagery from volcanoes
Volcanic drones help predict eruptions and assess geological hazards
Applications extend to radiation zones, chemical spills, and extreme weather research
Why Hazardous Environment Research
Traditional scientific research in dangerous environments risked human lives and limited data collection. Drones eliminate human risk while gathering high-quality scientific data from places like active volcanoes, radiation zones, and severe weather systems.
Drone Applications in Dangerous Research
Environment | Data Collected | Key Advantage | Example Use |
|---|---|---|---|
Active Volcanoes | Gas composition, thermal imaging, crater mapping | No human exposure to toxic gases | Stromboli, Etna monitoring |
Hurricane Eyes | Wind speed, pressure, temperature | Real-time data during storms | NOAA hurricane hunters |
Nuclear Disaster Sites | Radiation levels, structural damage | No radiation exposure | Fukushima assessment |
Chemical Spills | Gas concentrations, spread patterns | Avoid toxic exposure | Industrial accident response |
Arctic Research | Ice thickness, wildlife behavior | Extreme cold survival | Polar bear population studies |
Volcanic Research Capabilities
Gas sampling: Collect volcanic gases like SO₂, H₂S, and CO₂ for eruption prediction
Thermal mapping: Infrared cameras detect temperature changes indicating magma movement
3D crater mapping: Create detailed topographic maps of changing crater structures
Real-time monitoring: Stream live data to scientists at safe distances
Multi-sensor platforms: Combine cameras, gas sensors, and weather instruments
Trap: Thinking drones can't handle extreme temperatures — specialized drones withstand volcanic heat
Confusion: Assuming all scientific drones are the same — volcano drones need heat-resistant materials
Trap: Believing drone research is less accurate than human research — often more precise due to specialized sensors
Drones in Wildlife Research
Science And Technology whales breath samples DNA analysis
Wildlife Research Drones: Marine Biology & Conservation Applications
Drones collect whale breath samples for DNA analysis without disturbing marine life
Australian scientists pioneered whale breath collection using drones at 200 meters altitude
Wildlife drones enable non-invasive research on endangered species behavior and health
Applications include population counting, migration tracking, and habitat monitoring
Revolutionary Wildlife Research
Traditional wildlife research often disturbed animal behavior or required dangerous human proximity. Drones enable non-invasive scientific collection — like capturing whale breath spray that contains DNA, proteins, and bacteria for health analysis.
Drone Applications in Wildlife Research
Research Type | Method | Data Collected | Conservation Impact |
|---|---|---|---|
Whale Health Studies | Breath sample collection from blowholes | DNA, proteins, bacteria, hormones | Disease detection without capture |
Population Surveys | Aerial photography and counting | Population size, distribution patterns | Accurate census for protection |
Migration Tracking | Long-range following with GPS | Migration routes, timing, stopover sites | Habitat corridor protection |
Anti-Poaching | Thermal imaging surveillance | Poacher locations, animal movements | Real-time protection alerts |
Nesting Behavior | Time-lapse observation | Breeding success, habitat preferences | Breeding ground conservation |
Whale Breath Collection Process
Hovering technique: Drone hovers 200 meters above whale blowholes during surface breathing
Sample collection: Specialized containers capture mucus spray expelled during whale exhalation
Laboratory analysis: Breath samples reveal health status, stress levels, and genetic information
Non-disturbance: Whales continue normal behavior unlike traditional boat-based research methods
Multiple species: Technique works for humpback, blue, gray, and sperm whales
India's Wildlife Drone Applications
Tiger monitoring in reserves like Corbett and Bandhavgarh using thermal cameras
Elephant corridor mapping to reduce human-elephant conflict incidents
Gharial nesting surveys along Ganges and Chambal rivers for population recovery
Snow leopard research in Ladakh and Himachal Pradesh high-altitude regions
Marine turtle tracking along Odisha coasts during nesting season
Trap: Assuming wildlife research drones disturb animals — properly operated drones are non-invasive
Confusion: Thinking breath samples are just air — whale breath contains mucus with DNA
Trap: Believing drone research is less scientific — it often provides better data than traditional methods
Drone Technology & Capabilities
Science And Technology drones technology unmanned
Drone Technology: Types, Capabilities & UPSC Applications
Drones are unmanned aerial vehicles (UAVs) capable of autonomous or remote-controlled flight
Current technology enables civilian, commercial, and scientific applications beyond military use
Modern drones carry specialized payloads for specific tasks like spraying, sampling, or monitoring
AI and GPS integration enable autonomous navigation and precise operations
Beyond Military Applications
While drones originated as military technology, current capabilities extend far into civilian sectors. Modern drones combine autonomous navigation, specialized sensors, and payload delivery systems for diverse applications from agriculture to scientific research.
Drone Categories by Application
Drone Type | Size Range | Key Features | Primary Applications | Flight Duration |
|---|---|---|---|---|
Agricultural Drones | Medium (2-20 kg) | Liquid tanks, spray nozzles, GPS guidance | Pesticide spraying, crop monitoring | 20-40 minutes |
Research Drones | Small to Large (0.5-50 kg) | Specialized sensors, sample collection | Scientific data gathering | 30 minutes-8 hours |
Surveillance Drones | Small to Medium (1-15 kg) | High-resolution cameras, thermal imaging | Security, wildlife monitoring | 1-6 hours |
Delivery Drones | Medium (5-25 kg) | Cargo compartments, precision landing | Package delivery, medical supplies | 15-45 minutes |
Mapping Drones | Small to Medium (1-10 kg) | LiDAR, photogrammetry equipment | Surveying, 3D mapping | 25-90 minutes |
Core Drone Technologies
# Drone Technology Stack
## Flight Systems
- **Autopilot software**
- **GPS navigation**
- **Obstacle avoidance**
- **Stabilization**
## Communication
- **Radio control**
- **Telemetry data**
- **Real-time video**
- **Satellite links**
## Sensors
- **Cameras (RGB/IR)**
- **LiDAR scanning**
- **Chemical sensors**
- **Weather instruments**
## Payload Systems
- **Spray mechanisms**
- **Sample collectors**
- **Cargo holds**
- **Robotic arms**Trap: Assuming drones are only military technology — civilian applications now dominate the market
Confusion: Thinking all drones are small consumer devices — industrial drones can carry significant payloads
Trap: Believing current drone technology cannot handle complex tasks — modern drones perform sophisticated operations
UPSC Pattern: Questions test specific civilian applications rather than general drone concepts