In December 2013, TTEX-2013 (Trilateral Tabletop Maritime Security Exe

In December 2013, TTEX-2013 (Trilateral Tabletop Maritime Security Exercises) was conducted between :

India, Maldives and Bangladesh
India, Sri Lanka and China
India, Sri Lanka and Maldives
Sri Lanka, Pakistan and Bangladesh
This question was previously asked in
UPSC CAPF – 2014
The Trilateral Tabletop Maritime Security Exercise (TTEX) in December 2013 was a maritime security exercise conducted jointly by the navies of India, Sri Lanka, and Maldives. These countries cooperate on maritime security in the Indian Ocean region, particularly focusing on issues like counter-piracy, maritime terrorism, and disaster response.
TTEX is a simulation-based exercise designed to improve coordination and understanding among the participating navies on maritime security threats and responses.
India, Sri Lanka, and Maldives are part of a trilateral maritime security cooperation framework in the Indian Ocean. Exercises and discussions among these three nations are regular events aimed at enhancing regional stability and security.