The DOD’s vessels ORV Sagar Kanya and FORV Sagar Sampada were deployed for studying the impact of tsunami on the ocean environment and its resources in the Bay of Bengal and Arabian Sea during January – February 2005.
Immediately after the tsunami, the vessel PRV Sagar Kanya sailed from Goa on 3rd January 2005 with scientists from NCAOR, NIO, Goa and NIO, Regional Centre, Visakhapatnam and carried out multi-disciplinary observations along the affected coastal areas of Malabar coast and Nagapattinam, Cuddalore, Pondicherry and Chennai on the Coromandal coast.

Leading scientists and media have raised apprehensions with regard to the impact of tsunami on the fishery resources also. In the given scenario, a team of scientists from Cochin University of Science & Technology, NIO-RC, Kochi, Annamalai University and CMLRE, Kochi sailed out from Kochi onboard FORV Sagar Sampada on 5.1.2005 to carry out detailed investigations on the impact of tsunami on the benthic communities, water chemistry and productivity patterns of the coastal waters covering Kerala, Tamil Nadu and Andhra coasts and Andaman and Nicobar Islands.
Impact assessment was made through comparison of the results with previous data collected from these areas by the earlier cruises of FORV Sagar Sampada. Concurrent measurements on the near coastal waters i.e. up to 30 m depth were also undertaken by involving scientists from NIO-RC, Kochi; CUSAT; CMFRI, CMLRE and Annamalai University.

From all these analysis DOD-India have made a preliminary report of Tsunami happened on th Dec 2004. you can Download it here Tsunami Report