Examine how India's growing defence and maritime engagement with Sri Lanka helps counterbalance extra-regional influence in the Indian Ocean Region.

Sri Lanka sits astride the sea lanes of the northern Indian Ocean, making it the pivot of extra-regional competition for port access and naval presence. India's response has been steady engagement rather than confrontation — the 12th edition of SLINEX concluded at Colombo on 18 August 2025 [1], the latest link in an unbroken annual chain now continuing as SLINEX-26 [2]. Its counterbalancing value is real but limited.

Presence built through routine access

• SLINEX alternates hosts — Trincomalee (2020) [3], Visakhapatnam under Eastern Naval Command (Dec 2024) [4], Colombo (2025) [1] — giving Indian warships regular, invited access to Sri Lankan harbours.
• Recurring port clearances and reciprocal logistics normalise Indian naval presence, denying exclusivity to any outside navy.

Interoperability and capability-building

• Harbour phase covers HADR, firefighting and damage control; sea phase covers gunnery, VBSS (Visit, Board, Search and Seizure), navigation and communication drills [1].
• Shared procedures make India the first responder Colombo can call during disasters, oil spills or anti-piracy emergencies.

Continuity as strategic capital

• The series survived Sri Lanka's economic crisis and changes of government [3][2] — rare durability in neighbourhood diplomacy, operationalising SAGAR and Neighbourhood First.
• It nests within a wider ladder: bilateral SLINEX, the trilateral Colombo Security Conclave, and multilateral MILAN.

Limits of the instrument

• The scale is modest: two ships per side over five days, with Sri Lanka fielding Advanced Offshore Patrol Vessels (SLNS Gajabahu, Vijayabahu) against INS Rana and INS Jyoti [1] — precluding anti-submarine drills against the surveillance activity India actually tracks.
• Goodwill is not leverage; Colombo's port and lease decisions remain sovereign, and detentions of Indian fishermen persist as a live parliamentary issue [5].

Defence engagement therefore secures influence, not exclusivity. India should deepen it functionally — extending the sea phase to a joint fishing-boat boarding and handover drill built on existing VBSS skills, and expanding hydrographic and HADR cooperation — so that the SAGAR vision translates into capabilities Sri Lanka values daily.