Why this matters now

India has 7,517 km of coastline, 13 coastal states/UTs, and a 2.4 million sq km Exclusive Economic Zone — and sits astride the Indian Ocean's most important Sea Lines of Communication. ~80% of the world's oil tankers and ~60% of global merchant traffic pass through Indian Ocean waters. Three reasons coastal & maritime security closes the Internal Security cluster. First, 26/11 is the most studied counter-terror failure in independent India's history; the post-26/11 architecture is now textbook reference. Second, the three-tier framework + IMAC + IFC-IOR is the only Indian internal-security architecture with significant international integration. Third, growing Chinese naval presence in the Indian Ocean (Djibouti base, Hambantota, Gwadar) makes maritime security increasingly strategic.

7,517 km
Coastline
2.4 M km²
EEZ
~84
CSN radar stations (planned)
2.5 L+
Registered fishing boats

26/11 — the watershed

The 26/11 Mumbai attacks (26-29 November 2008) exposed massive gaps:

  • No coordinated coastal surveillance — Navy + Coast Guard + state Marine Police in silos;
  • No real-time Maritime Domain Awareness — couldn't track all vessels in EEZ;
  • No integration of fishermen — 2.5 lakh fishing boats unidentified;
  • No Automatic Identification System (AIS) mandate;
  • Weak intelligence coordination on maritime threats;
  • State Marine Police under-resourced;
  • Port security weak;
  • No roles & responsibilities doctrine across agencies.

The post-26/11 overhaul was the most comprehensive Indian internal-security architecture revision since independence.

Three-tier coastal security framework

TierForceZoneFunctions
1Indian NavyBeyond 12 nm to 200 nm EEZEEZ patrolling, sub-surface and air coverage, SLOC protection, blue-water capability
2Indian Coast Guard0-12 nm Territorial Waters + 12-24 nm Contiguous ZoneMaritime law enforcement, SAR, anti-smuggling, pollution response, fisheries protection
3State Marine Police0-12 nm Coastal Waters (close to shore)Coastal policing, beach patrolling, fishing harbour inspection, local intelligence

The Navy was designated overall in-charge for coastal security in December 2009. The Commander-in-Chief of the relevant naval command coordinates across tiers.

Marine Police status (2024): ~12 coastal states + 4 UTs have Marine Police; ~200+ coastal police stations; ~1,500+ vehicles and ~1,000+ boats; ~50,000+ personnel. Funded under the Centre's Coastal Security Scheme.

Coastal Surveillance Network (CSN)

Chain of high-frequency surface-wave radar stations along the Indian coast:

  • Phase I (~46 stations + 10 mobile) — completed by 2018; mainland + Andaman/Nicobar/Lakshadweep;
  • Phase II (~38 additional stations) — ongoing;
  • Phase III (~32 more stations) — fills Sundarbans, Gujarat Rann gaps.

Each station has surface radar, AIS receiver, electro-optic sensors, and communication links. Run by the Indian Coast Guard.

IMAC & NC3I — the fusion architecture

Information Management and Analysis Centre (IMAC), Gurugram — operationalised 2014. Multi-agency fusion centre integrating data from CSN + Coast Guard + Navy + Customs + Ports + State Marine Police + Fisheries Department. Provides real-time Maritime Domain Awareness 24×7.

National Command Control Communication and Intelligence Network (NC3I) — the data backbone connecting IMAC to 80+ Navy command centres, 40+ Coast Guard stations, Marine Police, lighthouses, ports, and AIS coverage. Together CSN + IMAC + NC3I create India's Maritime Domain Awareness architecture — conceptually comparable to NORAD or US Coast Guard's Common Operating Picture.

IFC-IOR — international maritime fusion

Information Fusion Centre for Indian Ocean Region (IFC-IOR) — established 22 December 2018 at Gurugram (co-located with IMAC). The regional maritime information hub. 24×7. Integrates international partners — US, France, UK, Japan, Australia, Sri Lanka, Maldives, Mauritius, Seychelles, and others — for:

  • Piracy tracking;
  • Illegal fishing;
  • Drug smuggling;
  • Migration;
  • Maritime disaster response.

IFC-IOR has become a regional hub for maritime collaboration. India's "SAGAR" doctrine (Security and Growth for All in the Region) is operationalised here.

Sagar Prahari Bal

The Indian Navy's specialised coastal patrol force; established 2008 post-26/11. ~1,000 personnel. Equipped with Fast Interceptor Crafts (FICs), guns, surveillance equipment. Deployed at 11 designated coastal stations; focuses on naval infrastructure (Karwar, Visakhapatnam) and oil platforms (Mumbai High, KG basin).

Fishermen integration — eyes and ears

The "fisherman as eyes and ears" doctrine recognises that ~2.5 lakh registered fishing boats and ~14+ lakh fisherfolk are India's first maritime surveillance layer. Steps taken:

  • Biometric ID cards mandatory for all fishermen;
  • AIS transponders for boats >20m;
  • Doppler beacon transponders for smaller boats (under development);
  • Fisherman helpline — 1093 (national);
  • RAW Sagar Prahari rapid alert system;
  • ICG Community Interaction Programmes regularly;
  • Fishing harbour security under Marine Police.

National Maritime Security Coordinator

Position created 2022 under National Security Adviser. First incumbent: Vice Admiral G. Ashok Kumar (Retd). Coordinates Centre-State-MoD-MoHA-Fisheries Department. Apex coordination for India's growing maritime footprint.

Other recent steps

  • Sea Vigil — largest biennial coastal security exercise; ~500+ vessels participate; held 2019, 2021, 2023; 2025 scheduled;
  • National Maritime Security Policy (NMSP) — under preparation since 2022;
  • Sagarmala Programme — port-led development (₹6.5 lakh crore over 10 years);
  • Sagarmanthan dialogue 2024 — India's first major maritime conference in Mumbai;
  • India-France white shipping, India-US LEMOA, India-UAE/Oman/Mauritius arrangements.

Current challenges

  • Maritime terrorism — 26/11 model remains a risk;
  • Piracy — Somalia waters reduced ~98% since 2011; Gulf of Guinea + South China Sea continue;
  • Drug trafficking — Makran coast route; record seizures (~₹50,000 crore in 2023-24);
  • IUU fishing — Chinese trawlers; Palk Bay TN-Sri Lanka conflicts;
  • Human trafficking — Sundarbans, Andaman, TN coast;
  • Bangladesh migration — Sundarbans porous; Rohingya inflows;
  • Chinese naval presence — Djibouti 2017, Hambantota, Gwadar; String of Pearls;
  • Undersea cables — 17+ international cables landing on Indian coast;
  • Underwater threats — Pakistani submarines, mines;
  • Climate-induced — cyclones, sea-level rise affecting ports;
  • Cyber attacks on maritime sector — ports, vessels, navigation systems;
  • Maritime Theatre Command — proposal under Chief of Defence Staff still pending.
"India's coastal security architecture is the most successful post-disaster security overhaul in independent India. The 26/11 to IMAC arc is now textbook — but the next test will be how the architecture scales as the Indian Ocean becomes the centre of great-power competition." — paraphrasing the Standing Committee on External Affairs maritime security reports

UPSC PYQs and likely future questions

UPSC angle

Coastal & Maritime Security is now a recurring GS-3 theme. Strong answers cite 26/11 as the watershed, the three-tier framework, CSN/IMAC/NC3I architecture, IFC-IOR international cooperation, and Chinese naval expansion as the strategic context.

  • 2019 GS-3: "Cross-border movement of insurgents is only one of the several security challenges facing the policing of the border. What other security challenges do you visualise?"
  • 2022 GS-3: "What are the maritime security challenges India faces? Discuss the multilateral approach India can adopt to overcome them."
  • 2024 GS-3: "Examine India's coastal security architecture as it has evolved after 26/11. What are the current gaps?"
  • 2017 GS-3: "Border management is a complex task due to difficult terrain and hostile relations with some countries. Elucidate the challenges and strategies for effective border management."
  • Likely 2026: "Discuss IFC-IOR as a model for regional maritime cooperation. To what extent has SAGAR doctrine been operationalised?"
  • Likely 2026: "Examine the proposed Maritime Theatre Command and its implications for India's maritime security architecture."

Internal Security cluster — COMPLETE at 4/4

All ten thematic clusters now complete: Federalism, Rights, Economy, IR, Society, Climate, S&T, Health, Governance, Internal Security. 40 deep-dives total across all clusters.

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