Guarding the Blue Frontier: Coastal and Maritime Security

Coastal security is the protection of India's shoreline, island territories, ports and sea lanes against infiltration, smuggling, piracy and maritime terrorism. As promulgated by the Ministry of Ports, Shipping and Waterways circular dated 29 April 2025, India's coastline was re-measured at 11,098.81 km, superseding the older 7,516.6 km figure after a National Hydrographic Office and Survey of India reassessment. The revision matters because every plan for ports, disaster risk and maritime patrols now rests on the longer baseline.

The 26/11 Mumbai attacks of 2008 are the founding lesson of the modern architecture: ten terrorists reached Mumbai by sea, exposing gaps in coastal surveillance and inter-agency coordination. The response built a three-tier maritime security grid of marine police, the Indian Coast Guard and the Navy, tied together by coastal police stations, Joint Operations Centres and the NC3I information network. This article maps that grid at the level of policy, mandate and doctrine.

Why the sea matters: the economic and strategic stakes

Maritime trade dependence is the starting fact of coastal security. About 90 percent of India's trade by volume and 70 percent by value moves by sea through 12 major and more than 200 minor ports, alongside 1,547 notified fish landing centres (Department of Fisheries, March 2026). An Exclusive Economic Zone (EEZ) of about 2.37 million sq km carries fisheries, hydrocarbons and submarine cables that underpin the digital economy. A breach at sea is therefore an economic shock, not just a policing failure.

Sea lines of communication (SLOCs) are the shipping highways India must keep open. The Indian Maritime Security Strategy (IMSS), 2015, is the Navy's comprehensive strategy for securing these lanes through greater coordination among maritime agencies and multilateral engagement. Why in news: the 2025 coastline revision refreshed the baseline for port planning, tourism zones and cyclone-erosion assessments.

The post-26/11 architecture: three tiers, one grid

The three-tier maritime security grid is the layered ring created after 26/11. The marine police patrol shallow waters close to the coast, the Indian Coast Guard handles the intermediate layer as the principal maritime law-enforcement and search-and-rescue agency, and the Indian Navy secures the outer layer with overall responsibility for maritime security. The table below fixes the layer each force owns at policy level.

The Coastal Security Scheme (CSS) is the infrastructure programme that built the inner tier. Its Phase-I created 73 coastal police stations, 97 check posts, 58 outposts and 30 barracks to strengthen patrolling and surveillance of coastal areas, particularly shallow waters. Later phases extended boats, communications and training, keeping the emphasis on the marine-police layer rather than on naval operations.

The National Committee for Strengthening Maritime and Coastal Security (NCSMCS) is the apex coordination body, headed by the Cabinet Secretary. Below it, Joint Operations Centres (JOCs) at Mumbai, Visakhapatnam, Kochi and Port Blair act as command-and-control hubs that bring the Navy, Coast Guard, marine police, customs and intelligence to one table. Standard operating procedures and joint coastal-security exercises keep the grid rehearsed.

Seeing the sea: NC3I, IMAC and maritime domain awareness

Maritime domain awareness is the continuous picture of who is moving where at sea. The National Command Control Communication and Intelligence Network (NC3I) is the network that collates and disseminates coastal-security data, interlinking Navy and Coast Guard stations. Its feed flows into the Information Management and Analysis Centre (IMAC) as the national nodal point for fusing vessel and coastal information at the policy level.

Regulation of maritime activities complements the sensors. Policy instruments include multi-purpose identity cards for fishermen, uniform licensing of fishing craft and GPS-based vessel tracking. The Sagar Suraksha Dal formalises the fishing community's surveillance role, while Operation Sagar Kavach is the post-26/11 exercise that tests coordination among security agencies, state governments and the fishing community. Fishermen remain the grid's human sensor network.

From SAGAR to MAHASAGAR: the maritime doctrine

SAGAR is the acronym for Security and Growth for All in the Region, India's strategic vision for the Indian Ocean Region unveiled by the Prime Minister at Mauritius in March 2015. It commits India to a consultative, rules-based order anchored in the United Nations Convention on the Law of the Sea (UNCLOS), with capacity-building for island neighbours, information-sharing and coastal-surveillance support. Through it India presents itself as a net security provider and first responder for humanitarian assistance and disaster relief.

MAHASAGAR is the acronym for Mutual and Holistic Advancement for Security and Growth Across Regions, advanced from Mauritius in March 2025. It widens the SAGAR logic from the Indian Ocean to the broader Global South through training cooperation, infrastructure, knowledge-sharing and technology partnerships. The Indian Ocean Ship (IOS) SAGAR deployments, with personnel from friendly foreign countries sailing together, are its practical expression at the level of naval diplomacy.

The Indian Ocean Naval Symposium (IONS) is the voluntary forum of Indian Ocean littoral navies that carries this cooperation, alongside exercises such as MILAN and coordinated patrols. The policy point for mains answers is continuity: the doctrine moved from regional partnership to a wider developmental and strategic vocabulary without changing its collaborative core.

Island territories and port security

The Andaman and Nicobar Islands are the strategic anchor of the eastern seaboard. The archipelago spans 450 nautical miles near the western entrance of the Malacca Strait, with its northernmost point 22 nautical miles from Myanmar and Indira Point 90 nautical miles from Indonesia. The islands form just 0.2 percent of India's landmass but about 30 percent of its EEZ, and more than 60,000 commercial vessels pass each year through the Six Degree and Ten Degree Channels.

The Andaman and Nicobar Command is India's only tri-service command, the institutional expression of jointness at sea. Port security rests on the same logic at the mainland: major ports handle concentrated cargo and nearby populations, so port facilities are treated as critical infrastructure where customs, immigration, port authorities and the coastal grid converge. The policy lens stays on mandates and coordination, not on deployment detail.

The Anti-Maritime Piracy Act, 2022 is the legal anchor for the high seas. It defines piracy as illegal acts of violence, detention or depredation for private ends on the high seas including the EEZ, makes it an extraditable offence, provides for designated courts and authorises only notified personnel to arrest and seize. It gives domestic effect to India's UNCLOS commitment against piracy on vital routes such as the Gulf of Aden.

Challenges: what still strains the blue frontier

Coastal security challenges cluster in five families. A long, indented shoreline of creeks and estuaries complicates surveillance; unsettled maritime boundaries hinder patrolling; proximity to volatile neighbourhoods raises infiltration risk; and centre-state coordination remains the recurrent friction. The list below keeps each item at the level of policy diagnosis.

• Maritime terrorism: hostage-taking, hijacking and attacks on ships, ports, naval bases and petrochemical facilities; the 26/11 sea route is the reference case.
• Smuggling and trafficking: gold, electronics, narcotics and weapons moved along the coast; policy response is interdiction mandates plus DRI and customs coordination.
• Infiltration and illegal migration: unauthorised entry through landing centres and fishing harbours; the answer lies in vessel regulation and coastal-police coverage.
• Illegal, Unreported and Unregulated (IUU) fishing: unlicensed fishing that depletes stocks and masks intrusions; uniform licensing and vessel tracking are the policy tools.
• Piracy and armed robbery at sea: threats to navigation on sea lanes; the 2022 Act and naval-diplomacy patrols are the institutional response.

The way forward: a five-point policy compass

A five-point agenda on maritime security distils the way forward: keep maritime trade free and rules-based, settle disputes peacefully under international law, build responsible maritime connectivity, combat non-state threats and natural calamities together, and preserve the marine environment. Each point below translates it into an institutional step.

• Deepen the grid: complete Coastal Security Scheme coverage and keep JOC-led coordination rehearsed through Sagar Kavach.
• Fuse the picture: strengthen NC3I-IMAC data fusion and vessel-identity regimes without duplicating naval mandates.
• Enlist the coast: expand Sagar Suraksha Dal-style community surveillance and fishermen outreach as the inner tier's sensor.
• Lead the region: sustain IONS, MILAN and coordinated patrols as the SAGAR-MAHASAGAR operating system.
• Grow the blue economy safely: pair port-led development and sustainable fisheries with marine-environment safeguards.

UPSC and this topic: PYQ weightage

How the Commission has asked this topic: coastal security recurs in both prelims and mains, usually through the 26/11 lesson, the three-tier grid and the SAGAR doctrine. The 2022 prelims question on coastal borders and repeated mains questions on maritime security make the architecture diagram and the doctrine timeline high-yield revision.

• 2022 prelims: asked on India's coastal borders and their management.
• Mains GS-3: maritime and coastal security challenges and the institutional response form a standard 150-word question.
• Doctrine questions: SAGAR and MAHASAGAR test whether aspirants can place naval diplomacy in a policy frame.

Key Terms

• Coastal security: Coastal security is the protection of the shoreline, ports, island territories and sea lanes against infiltration, smuggling, piracy and maritime terrorism. It matters because about 90 percent of trade by volume moves by sea. Example: Coastal Security Scheme.
• Three-tier maritime security grid: The three-tier maritime security grid is the post-26/11 layered ring of marine police in shallow waters, the Coast Guard in the intermediate layer and the Navy in the outer layer. It matters as the core institutional answer to the 26/11 lesson. Example: JOC-coordinated grid.
• Coastal Security Scheme (CSS): The Coastal Security Scheme is the central programme that built the marine-police tier, with Phase-I creating 73 coastal police stations, 97 check posts, 58 outposts and 30 barracks. It matters as the infrastructure behind inner-tier patrolling. Example: CSS Phase-I.
• National Committee for Strengthening Maritime and Coastal Security (NCSMCS): The National Committee for Strengthening Maritime and Coastal Security is the apex coordination body for coastal security, headed by the Cabinet Secretary. It matters as the whole-of-government forum above the operational tiers. Example: NCSMCS review.
• Joint Operations Centre (JOC): A Joint Operations Centre is the command-and-control hub that brings the Navy, Coast Guard, marine police, customs and intelligence to one table. JOCs sit at Mumbai, Visakhapatnam, Kochi and Port Blair. Example: Mumbai JOC.
• National Command Control Communication and Intelligence Network (NC3I): The National Command Control Communication and Intelligence Network is the network that collates and disseminates coastal-security data from Navy and Coast Guard stations. It matters as the information backbone of maritime domain awareness. Example: NC3I feed.
• Information Management and Analysis Centre (IMAC): The Information Management and Analysis Centre is the national nodal centre that fuses vessel and coastal information flowing from the NC3I network. It matters as the single national picture of the seas at policy level. Example: IMAC fusion.
• Sagar Suraksha Dal: The Sagar Suraksha Dal is the formalised fishermen-watch programme in coastal states that makes the fishing community the eyes and ears of coastal security. It matters as community-based surveillance. Example: Sagar Suraksha Dal patrol.
• Operation Sagar Kavach: Operation Sagar Kavach is the post-26/11 coastal-security exercise that tests coordination among the Navy, Coast Guard, marine police, states and fishermen. It matters as the rehearsal mechanism of the grid. Example: Sagar Kavach drill.
• Indian Maritime Security Strategy (IMSS), 2015: The Indian Maritime Security Strategy, 2015 is the Navy's comprehensive strategy for coordination among maritime agencies, securing sea lines of communication and multilateral engagement. It matters as the doctrinal baseline. Example: IMSS 2015.
• SAGAR: SAGAR is Security and Growth for All in the Region, India's Indian Ocean vision unveiled at Mauritius in March 2015. It commits India to a rules-based, collaborative order and a net-security-provider role. Example: SAGAR vision.
• MAHASAGAR: MAHASAGAR is Mutual and Holistic Advancement for Security and Growth Across Regions, advanced at Mauritius in March 2025. It widens SAGAR to the Global South through training, infrastructure and technology partnerships. Example: MAHASAGAR framework.
• Indian Ocean Naval Symposium (IONS): The Indian Ocean Naval Symposium is the voluntary forum of Indian Ocean littoral navies for maritime cooperation. It matters as the multilateral home of SAGAR-era naval diplomacy. Example: IONS meeting.
• Anti-Maritime Piracy Act, 2022: The Anti-Maritime Piracy Act, 2022 defines piracy on the high seas including the EEZ, makes it extraditable, provides designated courts and authorises notified personnel for arrest and seizure. It matters as India's UNCLOS-enforcing statute. Example: 2022 Piracy Act prosecution.
• Exclusive Economic Zone (EEZ): The Exclusive Economic Zone is the 200-nautical-mile sea zone where India holds sovereign rights over resources. India's EEZ is about 2.37 million sq km. It matters for fisheries, hydrocarbons and security jurisdiction. Example: EEZ patrol mandate.
• Andaman and Nicobar Command: The Andaman and Nicobar Command is India's only tri-service command, integrating Army, Navy and Air Force assets in the islands. It matters as the jointness model at sea. Example: Tri-service command.
• Illegal, Unreported and Unregulated (IUU) fishing: Illegal, Unreported and Unregulated fishing is fishing outside licensing, reporting or conservation rules. It matters because it depletes stocks and can mask intrusions. Example: IUU fishing crackdown.
• Blue Economy: The Blue Economy is the sustainable use of ocean resources for growth, covering fisheries, ports, shipping and marine energy. It matters as the developmental complement of maritime security. Example: Blue Economy policy.

Practice questions