The 33rd edition of the Singapore-India Maritime Bilateral Exercise, known as SIMBEX 2026, commenced on 21 October 2026 in Visakhapatnam, Andhra Pradesh. The annual exercise brings together the Indian Navy and the Republic of Singapore Navy (RSN) to strengthen maritime cooperation, improve operational interoperability and enhance their ability to address common maritime security challenges. The exercise is scheduled to continue until 26 October 2026.
SIMBEX is an important component of the longstanding defence partnership between India and Singapore. Through joint training, professional exchanges and maritime operations, the two navies work towards improving mutual understanding and their ability to operate together. The exercise also provides an opportunity for naval personnel to exchange operational knowledge, develop familiarity with each other’s procedures and practise coordinated responses to maritime security situations.
The Republic of Singapore Navy’s ship RSS Supreme arrived in Visakhapatnam on 21 October 2026 to participate in the exercise. The opening ceremony was held aboard Indian Navy ships INS Nilgiri and INS Kamorta. Senior officers from both navies attended the event, reflecting the importance attached to bilateral naval cooperation and professional engagement.
The 2026 edition is organised into two phases: the Harbour Phase and the Sea Phase. The Harbour Phase runs from 21 to 23 October in Visakhapatnam. It focuses on professional interactions, Subject Matter Expert Exchanges (SMEEs), cross-deck visits, sporting engagements and planning conferences. These activities allow personnel from both navies to share knowledge, discuss procedures and prepare for coordinated operations at sea.
The Sea Phase is scheduled from 24 to 26 October in the Bay of Bengal. It will involve maritime operations and tactical exercises designed to improve coordination, operational readiness and proficiency in different aspects of naval warfare.
The Sea Phase will include Anti-Submarine Warfare (ASW), anti-surface warfare and anti-air warfare drills. Anti-submarine warfare involves detecting, tracking and responding to underwater threats, while anti-surface warfare focuses on threats posed by surface vessels. Anti-air warfare involves responding to potential aerial threats.
The exercise will also include seamanship evolutions and tactical manoeuvres. These activities help naval crews practise ship handling, coordinated movements and operational procedures in demanding maritime environments. By training together, the two navies can improve their ability to coordinate activities and respond to complex operational situations.
SIMBEX was first conducted in 1994 under the name Exercise Lion King. Over more than three decades, it has expanded in scope and complexity, evolving into a significant annual engagement between the Indian Navy and the Republic of Singapore Navy. It is recognised as the longest-running continuous bilateral naval exercise conducted by India with another country.
The continuity of SIMBEX reflects the importance both countries place on defence cooperation and professional naval engagement. Regular exercises enable the participating forces to build trust, improve communication and maintain familiarity with each other’s operating methods.
The Indo-Pacific is a strategically important maritime region encompassing the Indian and Pacific Ocean areas. It contains major shipping routes and is central to international trade, energy transportation and regional connectivity. Maintaining safe and stable maritime routes is therefore an important concern for countries across the region.
SIMBEX 2026 supports India’s maritime engagement with Southeast Asian partners and contributes to cooperation on shared maritime security challenges. By improving interoperability and strengthening professional ties, the exercise supports the broader objective of promoting peace and stability in the Indo-Pacific. It also demonstrates the practical role of bilateral military exercises in strengthening relations between partner countries.
SIMBEX 2026 is important for government examination preparation because it highlights India’s bilateral defence cooperation with Singapore. Questions on joint military exercises frequently appear in competitive examinations, particularly in defence, international relations and current affairs sections. Candidates should remember the participating countries, the naval forces involved, the location and the edition number.
The exercise enhances cooperation between the Indian Navy and the Republic of Singapore Navy. Joint training in anti-submarine, anti-surface and anti-air warfare helps participating personnel practise maritime operations and improve their ability to work together. These capabilities are relevant to protecting maritime interests and responding to emerging security challenges.
India and Singapore maintain close ties in trade, connectivity, diplomacy and defence. SIMBEX provides a practical platform for sustaining this relationship through regular naval engagement. It promotes professional exchanges, mutual understanding and cooperation between the two countries’ armed forces.
The exercise underlines the importance of maritime cooperation in the Indo-Pacific, where secure sea routes are essential for international commerce. For aspirants preparing for UPSC, State PCS and other examinations, SIMBEX connects current affairs with broader themes such as regional security, India’s Act East Policy and international partnerships.
The most important examination facts are that SIMBEX began in 1994 as Exercise Lion King, its 33rd edition commenced on 21 October 2026, and the exercise is being held in Visakhapatnam and the Bay of Bengal. Candidates should also learn the participating warships, RSS Supreme, INS Nilgiri and INS Kamorta, along with the distinction between the Harbour Phase and the Sea Phase.
SIMBEX originated in 1994 as Exercise Lion King, bringing the Indian Navy and the Republic of Singapore Navy together for bilateral naval training. The exercise subsequently developed into an established mechanism for professional interaction, operational learning and maritime cooperation between the two countries.
Over successive editions, SIMBEX has expanded in scope and operational complexity. Its activities have developed beyond basic professional interactions to include more advanced maritime warfare drills and tactical manoeuvres. The exercise’s continued organisation has helped build institutional familiarity and operational interoperability between the participating navies.
India and Singapore have developed a broad bilateral relationship that includes economic cooperation, diplomatic engagement and defence ties. Naval exercises such as SIMBEX provide a regular opportunity to strengthen these relations through practical cooperation. The exercise complements wider engagement between India and Southeast Asian countries.
Visakhapatnam, located on the coast of Andhra Pradesh, is an important naval centre and the headquarters of the Indian Navy’s Eastern Naval Command. Its location makes it a suitable venue for harbour-based professional activities and access to maritime operating areas in the Bay of Bengal. Hosting SIMBEX reinforces the city’s role in India’s eastern maritime engagement.
The Indo-Pacific’s importance has grown because of its extensive commercial shipping networks, strategic waterways and regional security concerns. Bilateral naval exercises allow participating countries to develop communication, coordination and operational familiarity. SIMBEX contributes to these objectives by strengthening the maritime partnership between India and Singapore.
SIMBEX 2026 is the 33rd edition of the Singapore-India Maritime Bilateral Exercise conducted between the Indian Navy and the Republic of Singapore Navy (RSN). It aims to strengthen maritime cooperation and improve operational interoperability between the two navies.
The exercise is being conducted in Visakhapatnam, Andhra Pradesh, with the Sea Phase scheduled in the Bay of Bengal.
SIMBEX 2026 is scheduled from 21 October to 26 October 2026.
India and Singapore participate in SIMBEX through their respective navies: the Indian Navy and the Republic of Singapore Navy.
SIMBEX began in 1994 under the name Exercise Lion King.
The Republic of Singapore Navy ship RSS Supreme arrived in Visakhapatnam on 21 October 2026 to participate in the exercise.
The opening ceremony was held aboard INS Nilgiri and INS Kamorta on 21 October 2026.
The exercise comprises the Harbour Phase, scheduled from 21 to 23 October, and the Sea Phase, scheduled from 24 to 26 October 2026.
The Sea Phase includes anti-submarine warfare, anti-surface warfare, anti-air warfare, seamanship evolutions and tactical manoeuvres in the Bay of Bengal.
SIMBEX strengthens India’s maritime defence cooperation with Singapore, enhances naval interoperability and supports efforts to address shared maritime security challenges and promote peace and stability in the Indo-Pacific.
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