Q.Why is the Indian Regional Navigational Satellite System [IRNSS] needed? How does it help in navigation? (150 Words, 10 Marks)
How to approach: Identify every sub-question in the prompt, allocate dedicated sub-headings to each part, substantiate points with examples/data, and conclude with a forward-looking Way Forward.
Practice & AI Tools for This Question
Wrote an answer to this PYQ? Check it with Vision AI in 3 mins or generate custom mind maps.
Syllabus Point
Miscellaneous / Science and Technology developments.
Approach
Introduction (30-40 words): Introduce IRNSS/NavIC as India's independent satellite navigation system.
Body (170-180 words):
Explain the strategic and regional necessity of IRNSS.
Describe its diverse applications in navigation and other sectors.
Conclusion (30-40 words): Summarize its significance for India's self-reliance.
Introduction
The Indian Regional Navigation Satellite System (IRNSS), commercially known as NavIC (Navigation with Indian Constellation), is an autonomous regional satellite navigation system designed by ISRO. Operational since 2018, it provides accurate positioning services over India and its surrounding region, reducing dependence on foreign GPS systems.
Body
Why is IRNSS Needed?
Strategic Autonomy: Reliance on foreign GPS can compromise national security during geopolitical crises. For example, the US denied GPS data to India during the 1999 Kargil War, highlighting the need for a sovereign system.
Regional Precision: Global navigation systems may lack high accuracy in the Indian subcontinent. NavIC ensures precise positioning within a 1,500 km radius of India's borders.
Disaster Management: Real-time, accurate location data facilitates swift search and rescue operations during natural disasters like cyclones and floods.
Civil and Military Utility: NavIC offers standard positioning services (SPS) for civilians (up to 20 meters accuracy) and restricted services (RS) for authorized military use.
Support for Future Tech: It enables emerging technologies like autonomous driving, drone navigation, and IoT integration.
How Does IRNSS Help in Navigation?
Terrestrial, Aerial, and Marine Navigation: Provides precise position, velocity, and timing (PVT) data.
Maritime Safety: Assists commercial vessels and fishermen in deep-sea navigation and border alerts.
Aviation and Rail Safety: Enhances flight path tracking and powers train anti-collision systems.
Disaster Response: Delivers critical geospatial data to coordinate emergency relief operations.
Precision Agriculture: Supports soil mapping, crop monitoring, and land surveying.
Public Transit: Aids in fleet tracking, route optimization, and urban transit management.
Defense Applications: Crucial for missile guidance, troop deployment, and tactical situational awareness.
Consumer Electronics: NavIC-enabled smartphones improve location-based services and logistics.
Conclusion
NavIC is a cornerstone of India's technological sovereignty, bolstering national security while driving economic growth across key sectors like defense, agriculture, and disaster management.
Question Specifications, Marking Rubric & Syllabus Mapping
| Examination & Year | UPSC Civil Services Mains Examination 2018 (Question 1) |
|---|---|
| Paper & Syllabus Topic | General Studies Paper I — Heritage, History, Society & Geography → Physical, Human & Indian Geography |
| Marks, Word Limit & Ideal Time | 10 Marks • 150 Words • Ideal Writing Time: 7–8 Minutes |
| Directive Word & Core Demand | Analytical / Multi-Dimensional: Address all explicit sub-parts of the question with balanced arguments, factual illustrations, and a solution-oriented conclusion. |
| Recommended Structure Split | Intro: ~20–25 Words • Body: ~100 Words (3–4 dimensions) • Conclusion: ~20–25 Words |
| AI Practice & Evaluation Tools | Upload Handwritten Answer for 3-Min Vision AI Evaluation | Generate Custom Answer & Mind Map |
Related & Repeated UPSC Mains PYQs (4)
Past UPSC Mains questions connected to this node in the 3D PYQ Realm knowledge graph.
What do you understand by “Standard Positioning System” and “Precision positioning system” in the GPS era? Discuss the advantage India perceives from its ambitious IRNSS programme employing just seven satellites.
Why is India taking keen interest in the Arctic region? (150 Words, 10 Marks)
The interlinking of rivers can provide viable solutions to the multi-dimensional inter-related problems of droughts, floods and interrupted navigation. Critically examine. (250 words, 15 marks)
Explain the role of geographical factors towards the development of Ancient India. (10 marks 150 words) (2023)
More UPSC Mains PYQs on Geography (GS1)
Build comprehensive topical mastery across Physical, Human & Indian Geography by practicing these related UPSC Mains questions.
What is sea surface temperature rise? How does it affect the formation of tropical cyclones?
What is the phenomenon of ‘cloudbursts’? Explain.
The groundwater potential of the Gangetic valley is on a serious decline. How may it affect the food security of India? (Answer in 250 words)
What are aurora australis and aurora borealis? How are these triggered? (Answer in 250 words)
What is a twister? Why are the majority of twisters observed in areas around the Gulf of Mexico?
Discuss the consequences of climate change on the food security in tropical countries. (Answer in 150 words)
Frequently Asked Questions — UPSC Mains 2018 GS1 (Geography)
How should I structure the answer for this UPSC Mains 2018 GS Paper I question on Geography?
This 2018 GS Paper I question carries 10 marks with a 150-word limit and uses the "Analytical / Multi-Dimensional" directive. Identify every sub-question in the prompt, allocate dedicated sub-headings to each part, substantiate points with examples/data, and conclude with a forward-looking Way Forward. Follow the ideal word split (Intro: ~20–25 Words • Body: ~100 Words (3–4 dimensions) • Conclusion: ~20–25 Words) and aim to finish within 7–8 Minutes.
Which UPSC Mains syllabus topic does this 2018 question belong to?
This question is part of General Studies Paper I — Heritage, History, Society & Geography under the syllabus module "Physical, Human & Indian Geography". You can explore all repeated questions from Geography in Acme AI's 3D PYQ Realm or filter all Geography PYQs on the Mains PYQ Directory.
How can I get my handwritten answer to this 2018 GS1 PYQ evaluated by AI?
Write your answer on standard UPSC margin sheets, scan it as a PDF or image, and click "Evaluate My Answer (AI)" on this page to open Acme AI's Vision Transformer evaluator (/upsc-answer-evaluation?subject=GS1). It evaluates your structure, directive alignment, diagrams/maps, and handwriting presentation in under 3 minutes with 99% human-examiner accuracy (20 free credits on signup).
Can I generate a custom mind map or Hindi model answer for this question?
Yes. Click "Generate Answer & Mind Map" on this page to open Acme AI's Answer Generator (/gen-ans) with this exact 2018 GS1 question pre-filled. You can generate custom topper-grade answers with embedded Mermaid flowcharts and mind maps in either English or Hindi.
AI-Powered Mains Mastery Suite
Turn Passive PYQ Reading into Active Answer Writing
Evaluate your handwritten UPSC Mains answers in 3 minutes with Vision AI or generate custom model answers with mind maps.
AI UPSC Mains Answer Evaluation
Practice writing any PYQ on paper and upload your handwritten scan (PDF or image) for instant, rubric-aligned UPSC examiner feedback.
- Direct Pixel Vision AI (Not Flat OCR): Evaluates your handwritten diagrams, maps, flowcharts, and spatial presentation
- 99% Human-Examiner Accuracy: Pinpoints missing dimensions, directive-word drift, and value-addition opportunities
- All Papers & 18 Optionals: Covers GS 1–4, Essay, Anthropology, PSIR, Sociology, Geography, History & more in English & Hindi
- Annotated Copy + Topper Benchmark: Visual margin ticks, remarks, and matched topper copy comparisons
AI UPSC Answer Generator & Mind Maps
Generate topper-grade model answers for any UPSC PYQ, current affairs editorial, or mock question—complete with visual mind maps and flowcharts.
- Embedded Mind Maps & Flowcharts: Automatically builds visual diagrams you can replicate in the exam hall for +1.5 extra marks
- Strict Directive & Word Discipline: Calibrated for 150-word (10M), 250-word (15M), and 1000-word Essay structures
- Committee, SC & Data Citations: Enriches body paragraphs with 2nd ARC, NITI Aayog, Constitutional Articles, and SDG hooks
- Auto-Matched Topper Copies & PYQs: Every generated answer links to similar past UPSC questions and ranker scripts
Join the Acme Mains Program (AMP 2027 — 45 Tests) or 1-on-1 Personal Mentorship with Avinash Sir.