International relations

Indian Ocean Naval Symposium (IONS)

GS2 International RelationsGS3 SecurityPrelims and Mains

In the news since 20 February 2026

Why in news
On 20 Feb 2026, at the 9th IONS Conclave of Chiefs in Visakhapatnam, the Indian Navy took over the IONS Chairmanship from the Royal Thai Navy.
What it is
The Indian Ocean Naval Symposium is a voluntary forum of navies of Indian Ocean littoral states. It was launched by India in 2008 to build maritime cooperation, shared understanding and trust. It works through a rotating Chair and working groups, and the Chair is held by a member navy for about two years.
Chair change
India took the IONS Chair from the Royal Thai Navy, returning after 16 years.
First chair
India held the inaugural Chairmanship from 2008 to 2010.
Working groups
The Chair's vision stresses three Working Groups: Maritime Security, HADR, and Information Sharing and Interoperability.
Membership changes
The Philippines was included as an Observer, and Oman joined the HADR Working Group.
India's agenda
India plans the IONS Maritime Exercise (IMEX), continued IOS SAGAR deployments and Maritime Information Sharing Workshops.

Don’t confuse with IONS vs IORA: IONS is a forum of navies; IORA (Indian Ocean Rim Association) is an intergovernmental body for economic and regional cooperation.

Don’t confuse with IONS vs Milan: Milan is an Indian Navy-hosted multilateral naval exercise at Visakhapatnam; IONS is a standing forum with a rotating Chair.

International bodies and relations: the largest group of news questions in Prelims (61 since 2013), often about background, members and location. In Mains, 27 news-triggered questions, mostly on India's interests.

Test yourself

Worth revising until Prelims 2027: most news questions come within two years of the event.

Each time it was in the news

  1. 20 February 2026

    On 20 Feb 2026, at the 9th IONS Conclave of Chiefs in Visakhapatnam, the Indian Navy took over the IONS Chairmanship from the Royal Thai Navy.