INDIA - SRI LANKA ANNUAL BILATERAL MARITIME EXERCISE (SLINEX-26)

1. At a Glance

• SLINEX is the annual bilateral maritime exercise between the Indian Navy and the Sri Lanka Navy, aimed at enhancing interoperability, joint operational drills and maritime security cooperation. [1]
• SLINEX-26 is the latest (2026) edition in an unbroken annual series tracked officially since SLINEX-20 (2020) via PIB releases. [1][7]
• Relevant for UPSC as a recurring example of India's neighbourhood-first policy and SAGAR (Security and Growth for All in the Region) doctrine applied to a key Indian Ocean neighbour. [1]

2. Why in the News

• PIB issued a dedicated 2026 press release titled "India – Sri Lanka Annual Bilateral Maritime Exercise (SLINEX-26)," confirming the exercise's continuation in 2026. [1]

3. Background & Evolution

• SLINEX is conducted annually, alternating host venues between India and Sri Lanka. [1]
• SLINEX-20 (2020): held off Trincomalee, Sri Lanka. [7]
• SLINEX-23: held under the "India–Sri Lanka Annual Bilateral Maritime Exercise" banner. [6]
• SLINEX-24: conducted 17–20 Dec 2024 at Visakhapatnam, under the Eastern Naval Command. [3][4]
• SLINEX-25 (12th edition): concluded at Colombo on 18 Aug 2025; harbour phase at Colombo (14–16 Aug 25), sea phase (17–18 Aug 25). Indian side fielded INS Rana (Guided Missile Destroyer) and INS Jyoti (Fleet Tanker); Sri Lankan side fielded SLNS Gajabahu and SLNS Vijayabahu (Advanced Offshore Patrol Vessels); Special Forces of both navies also participated. [5][2]
• SLINEX-26: by sequence, this is the 13th edition of the exercise. [1]

4. Core Static Facts

Aspect	Detail
Exercise name	SLINEX (Sri Lanka – India Exercise) [1]
Nature	Annual bilateral naval exercise [1]
Participating navies	Indian Navy; Sri Lanka Navy [1]
Host pattern	Alternates between India and Sri Lanka [3][2]
2024 edition venue	Visakhapatnam (India), under Eastern Naval Command [3][4]
2025 edition venue	Colombo (Sri Lanka) [2][5]
Typical structure	Harbour Phase (professional exchanges, HADR, firefighting/damage-control training, sports) + Sea Phase (gunnery, VBSS, navigation, communication drills) [5]
Indian assets seen in recent editions	INS Rana, INS Jyoti [5]
Sri Lankan assets seen in recent editions	SLNS Gajabahu, SLNS Vijayabahu [5]

5. Multi-Dimensional Analysis

Geopolitical / Strategic

• Reinforces India's position as the "net security provider" and preferred maritime partner in the Indian Ocean Region (IOR), especially given China's growing port and naval-visit footprint in Sri Lanka. [1]
• Institutionalised bilateral engagement supports India's SAGAR vision and Neighbourhood First policy. [1]

Administrative

• Indian-side coordination routed through Naval Commands (e.g., Eastern Naval Command hosted SLINEX-24 at Visakhapatnam). [3][4]
• Exercise alternates hosting responsibility annually between the two navies, requiring reciprocal logistics and port-clearance coordination. [3][2]

Historical

• Continuous edition-numbering (SLINEX-20 through SLINEX-26 confirmed via PIB) demonstrates sustained defence-diplomacy continuity despite periods of political flux in Sri Lanka. [7][6][3][2][1]

Scientific / Technological (Naval Interoperability)

• Drills cover VBSS (Visit, Board, Search and Seizure), gunnery firing, communication protocols and joint navigation — building common operating procedures for anti-piracy and maritime-security missions. [5]

6. Recent Developments (last 12–18 months)

• 17–20 Dec 2024: SLINEX-24 held at Visakhapatnam under Eastern Naval Command. [3][4]
• 14–18 Aug 2025: SLINEX-25 (12th edition) held at Colombo — harbour phase 14–16 Aug, sea phase 17–18 Aug; concluded 18 Aug 2025. [5][2]
• 2026: SLINEX-26 press release issued by PIB, confirming continuation of the series. [1]

7. Prelims Hooks

• SLINEX = Sri Lanka – India Exercise, an annual bilateral naval exercise. [1]
• SLINEX-24 was hosted at Visakhapatnam under the Eastern Naval Command (17–20 Dec 2024). [3][4]
• SLINEX-25 was the 12th edition, concluded at Colombo on 18 Aug 2025. [5][2]
• SLINEX-25 harbour phase: 14–16 Aug 2025; sea phase: 17–18 Aug 2025. [5]
• Indian Navy ships in SLINEX-25: INS Rana (Guided Missile Destroyer) and INS Jyoti (Fleet Tanker). [5]
• Sri Lanka Navy ships in SLINEX-25: SLNS Gajabahu and SLNS Vijayabahu (Advanced Offshore Patrol Vessels). [5]
• SLINEX-25 also featured Special Forces participation from both navies. [5]
• SLINEX-20 was held off Trincomalee, Sri Lanka. [7]
• SLINEX-26, by sequential numbering, is the 13th edition of the exercise. [1]
• SLINEX exercises typically comprise a Harbour Phase and a Sea Phase. [5]
• HADR (Humanitarian Assistance and Disaster Relief) drills are a standard component of the harbour phase. [5]
• VBSS (Visit, Board, Search and Seizure) is a standard sea-phase drill in SLINEX. [5]

8. The Navy We Train With Is the Navy That Detains Our Fishermen

• SLINEX builds naval habits, but the daily India–Sri Lanka friction at sea is a police problem, not a navy problem
• The Palk Bay dispute is about Indian fishing boats crossing the maritime boundary and being taken by the Sri Lanka Navy. This is raised often enough in Parliament that MEA answers formal questions on it [8].

• So the same Sri Lanka Navy that exercises with INS Rana one month [5] is detaining Tamil Nadu fishermen in another.

• The odd part: SLINEX already trains the exact skill, but for a different purpose

• VBSS (Visit, Board, Search and Seizure — sending a team onto another boat to check it) is a standard sea-phase drill in SLINEX [5].
• It is practised as an anti-piracy and maritime-security skill [5], not as an agreed way of handling a fishing boat that drifts across the line.

• Nothing in the published SLINEX structure — harbour phase (HADR, firefighting, damage control) and sea phase (gunnery, VBSS, navigation, communication) — covers a joint fisheries procedure [5].

• Why this is the gap to name in an answer

• An exercise can make two navies talk to each other smoothly [1]. It does not by itself decide what happens to a detained fisherman.

• The practical ask: use the trust SLINEX builds to write a common boarding and handover drill for fishing boats, and rehearse it in the sea phase alongside VBSS.

• Do not overstate it either. SLINEX is a navy-to-navy exercise. Fisheries policy sits with governments, not with the two ship captains.

9. Two Ships, Five Days: What SLINEX Can and Cannot Practise

• The exercise is small, and its size limits what it can rehearse
• SLINEX-25 ran from 14–18 Aug 2025 — three days in harbour, two days at sea [5][2].

• India sent two ships: INS Rana and INS Jyoti. Sri Lanka sent two: SLNS Gajabahu and SLNS Vijayabahu [5].

• The ship types decide the drill list

• Gajabahu and Vijayabahu are Advanced Offshore Patrol Vessels [5] — patrol ships, built for policing waters, not for hunting submarines or fighting aircraft.

• That is why the sea phase stays at gunnery firing, VBSS, navigation and communication drills [5]. You cannot practise a skill the partner's ship is not built for.

• So the exercise cannot train for the thing India actually worries about

• The strategic worry in the Indian Ocean is underwater and survey activity by outside navies [1].

• SLINEX's published drills do not include anti-submarine work [5]. The exercise builds a shared language, not a shared capability against that specific problem.

• The honest way to put this in a Mains answer: SLINEX raises the floor — common procedures, HADR readiness, Special Forces exchange [5] — rather than adding combat power.

10. The Counter-Case: Thirteen Editions, and Colombo Still Hedges

• The strongest argument against SLINEX's importance
• India has run this exercise without a break through SLINEX-20 in 2020 to SLINEX-26 [7][1].
• Yet Sri Lanka's larger choices — ports, leases, visits by outside navies — keep moving in ways India must react to [1].

• A critic's line: drills are goodwill, not leverage. Two ships and five days [5] do not change a neighbour's foreign policy.

• What is right about that argument. It is true. No naval exercise buys alignment. SLINEX has no treaty behind it and no binding obligation on either side.

• What the argument misses
• The alternating host pattern means Indian warships are routinely inside Sri Lankan harbours — Trincomalee in 2020, Colombo in 2025 — and Sri Lankan warships inside Indian ones, such as Visakhapatnam in 2024 [7][2][3].
• That regular presence and port-clearance coordination [3][2] is itself the product. It keeps India the default partner that gets called first.

• It survived Sri Lanka's economic crash and its changes of government [7][6][3][2][1]. Continuity through political flux is the rarest thing in neighbourhood diplomacy.

• Balanced verdict for an answer: SLINEX is not a counter to outside influence. It is insurance that the relationship has a working channel when something goes wrong.

11. Writing SLINEX Into an Answer Without Sounding Like Everyone Else

• Do not open with SAGAR and Neighbourhood First. Every script does. Examiners have read it a hundred times. Open with a fact only a prepared candidate has: SLINEX-25, 12th edition, Colombo, two ships a side, five days [5][2].
• Use SLINEX as evidence, not as the topic
• For a question on defence diplomacy, the useful point is continuity: an unbroken annual series from 2020 to 2026 [7][1].
• For a question on maritime security capability, the useful point is the limit: patrol vessels and basic drills [5].

• Same exercise, opposite evidence. Pick the one your question needs.

• Always place it in a ladder. SLINEX is bilateral [1]. Colombo Security Conclave is the small-group layer. MILAN is the many-country layer. An answer that shows the ladder reads as understanding; an answer that lists exercises reads as memory.

• Close with one concrete ask, not with "holistic approach". For example: extend the sea phase to include a joint fishing-boat boarding and handover drill, using the VBSS skill both navies already practise [5], since arrests in the Palk Bay remain a live parliamentary issue [8].

12. Anchors for Answers

• Data: SLINEX-25 (12th edition) — 14–18 Aug 2025 at Colombo; harbour phase 14–16 Aug, sea phase 17–18 Aug; two ships per side [5][2]
• Data: Series continuity — SLINEX-20 (Trincomalee) through SLINEX-26 (13th edition), unbroken and PIB-tracked [7][1]
• Parliamentary record: MEA answers to Rajya Sabha questions on arrest of Indian fishermen by the Sri Lankan Navy — the friction SLINEX does not cover [8]
• Comparison: MILAN (multilateral, many navies) against SLINEX (bilateral, two ships a side) — scale versus depth of a single relationship [5]
• Scheme: SAGAR, and the Colombo Security Conclave as the India–Sri Lanka–Maldives layer sitting above this bilateral drill [1]
• Platform detail: INS Rana (Guided Missile Destroyer) and INS Jyoti (Fleet Tanker) versus SLNS Gajabahu and SLNS Vijayabahu (Advanced Offshore Patrol Vessels) — the capability gap that shapes the drill list [5]

13. Mains Relevance

• GS-II (International Relations): India's bilateral relations with neighbouring countries; India's neighbourhood-first policy.
• GS-III (Internal Security / Defence): Maritime security, Indian Ocean Region security architecture, defence diplomacy and joint exercises.
• Possible question stems:
• Discuss the significance of India–Sri Lanka bilateral naval exercises like SLINEX in the context of India's SAGAR doctrine. (GS-II/III)
• Examine how India's growing defence and maritime engagement with Sri Lanka helps counterbalance extra-regional influence in the Indian Ocean Region. (GS-II)
• Bilateral military exercises are as much about diplomacy as defence preparedness. Discuss with reference to India's exercises with its maritime neighbours. (GS-II/III)

14. Related Topics to Study Next

• SAGAR (Security and Growth for All in the Region) — the doctrinal umbrella under which SLINEX and similar exercises are framed.
• Indian Ocean Rim Association (IORA) — multilateral counterpart to bilateral exercises like SLINEX.
• MILAN naval exercise — India's larger multilateral naval exercise, useful for comparison of scale/format.
• India–Sri Lanka relations (Katchatheevu, fishermen issue, Hambantota port) — broader bilateral context shaping defence cooperation.
• China's String of Pearls / Hambantota port lease — the strategic counter-narrative motivating India's Sri Lanka outreach.
• Colombo Security Conclave — trilateral (India-Sri Lanka-Maldives) maritime security grouping, closely linked to SLINEX-type bilateral drills.
• Other bilateral naval exercises — Varuna (France), Malabar (US-Japan-Australia), Indra (Russia) — for comparative Mains answers on India's defence diplomacy.

15. Common Errors / Trap Areas

• Do not confuse SLINEX (India–Sri Lanka) with SIMBEX (India–Singapore) or INDRA (India–Russia) — all are bilateral naval exercises with different partner countries.
• Host venue alternates each year — do not assume it is always held in Sri Lanka; recent editions have been hosted at Visakhapatnam (India) and Colombo (Sri Lanka) in successive years. [3][2]
• The nodal Indian command is the Eastern Naval Command (Visakhapatnam-based) when India hosts — not Southern or Western Naval Command. [3][4]
• Edition numbers are sequential and cumulative (12th = 2025, 13th = 2026) — aspirants often misstate the edition-year correspondence. [5][1]
• SLINEX is a bilateral, not multilateral, exercise — do not conflate with Colombo Security Conclave (trilateral) exercises.