Germany, to present a technical paper title "Wave Loads on Vertical Cylinders" at Intl. Conf. on Marine Research, Ship Tech. and Ocean Engg. Sep.27, Oct.2, 1982 held in Hamburg.

Canada, as a participant for Intl. training program on Exclusive Economic Zone at Dalhousie University, June 13 - Aug. 19, 1983.

Hawaii ,USA to present a technical paper titled, "Coastal Engineering Problems in India - An Overview" at pacific congress on Marine Technology, April 24 - 27, 1984.

Germany, as a Visiting Scientist at Technical University, Berlin, Feb. '87 - Jan. '88.

Halifax, Canada to present a paper titled "Distribution of Long shore Currents and Sediment Transport Rates in the Surf Zone off Paradeep, India" at Oceans 87, 28 Sep. - 1 Oct. 1988.

Germany, as a European Community postdoctoral fellow to Institute for fluid mechanics and computer applications in Civil Engineering, University of Hannover, Jan. '91 to June '91.

Germany, invited by Institute Fluid Mechanics and Computer application in Civil Engineering, University of Hannover, June-July '92.

Germany, invited by Franzius Institute, Hannover, May-July '93.

Germany, invited as Visiting Professor by German Science Foundation for the period May-July '94 and Dec.'94.

Japan, to present a paper in an Intl. Conf. HYDRO PORT '94, 19-21, Oct.'94.

Germany, under Joint project sponsored by German Science Foundation during the period 14 May - 6 July '95.

Germany, under Joint project sponsored by German Science Foundation during the period 14 May - 6 July '95.

Germany, under Joint project sponsored by German Science Foundation during the period 4th May - 4th July '96.

Malaysia, to present two papers and to Chair a Session in an Intl. Conf. On 10th Congress of APD-IAHR during the period 26 August -29 Aug '96.

Seoul, Korea to present a paper in an Intl. Conf. on The Third Asian-Pacific Conference on COMPUTATIONAL MECHANICS during the period 16-18 September, 1996.

Germany as Visiting Professor invited by German Science Foundation (May '97 - August '97).

San Fransisco, USA to present papers in IAHR Specialty Seminar on Multidirectional Waves and their Interaction with Structures (10 - 15 August, 1997)

Istanbul, Turkey to present papers and chaired a Technical session in the 8th Congress of International Association of Mediterranean (IMAM '97) (2-9 November, 1997).

Germany, under Joint project sponsored by German Agency for Technical Cooperation during the period 16th May - 10th July '96.

Leipzig, Germany under joint project sponsored by German Agency for Technical Cooperation (GTZ) during the period 15th May to 15th July, 1998.

Palm Beach, Florida, USA to present papers in International Coastal Symposium during the period 20 - 23 May, 1998.

Lisbon, Portugal to present paper in the 17th International Conference on Offshore Mechanics and Arctic Engineering (OMAE '98) during the period 5-9 July, 1998.

Hong Kong, China to present paper in the Seventh International Symposium on River Sedimentation and the Second International Symposium on Environmental Hydraulics, 15 - 19 Dec 1998.

Singapore to discuss about joint research project under a MOU singed between National University of Singapore Madras, 21-31 Dec, 1998.

Cape Town, South Africa to present a paper and chair a Technical session in the COPEDEC V Conference during 19 -24 April, 1999.

Victoria, B.C, Canada to present a paper in the Canadian Coastal Conference, 1999 during 19-23 May, 1999.

Genoa, Italy to present a paper in an International Conference on Monitoring and Control of Marine and Harbour Structures during 1-4 June, 1999.

Leipzig, Germany under joint project sponsored by German Agency for Technical Cooperation (GTZ) during the period 02-30 December, 1999.

New Orleans, USA to present papers in OMAE 2000 Conference on Energy for the New Millennium during 14-17 Feb, 2000.

Ischia, Naples,(ITALY) to present paper in the International Maritime Association of Mediterranean, IX Congress, (IMAM 2000), 2-6 April, 2000.

Leipzig, Germany under joint project sponsored by German Agency for Technical Cooperation (GTZ) during the period 17 May - 30 June, 2000.

Bander Abbas, Iran to present papers in ICOPMAS 2000 conf during 19 -23Nov, 2000

T.U. Delft,The Netherlands visiting Fellow invited by Stichtung Her Lamminga Foundation 4-20 Dec,2000

Subang Jaya, Malaysia , to present two technical papers in Asia-Pacific conference on offshore systems, April 23-26, 2001

Germany Visiting Professor to Univ. of Wuppertal, Germany invited by DAAD, Germany 1Oct 2001 to 30 Sept 2002

Invited lecture on "Coastal Erosion & Protection" Univ. of Wuppertal, Germany, Nov8, 2001

London, U.K to participate in Visnet (Violent waves interaction with Structures) working group workshop in London, 30Nov 2001

Canada to deliver an invited lecture in Queen 's University, on 15th April 2002

Glasgow, U.K to participate in Visnet (Violent waves interaction with Structures) working group workshop in, 26 Apr 2002

Singapore, to present papers in 13th Congress of the Asia and Pacific division of the IAHR, 6-8, August 2002.

Germany Visiting Professor to Univ. of Wuppertal, invited by DAAD, Germany 2June - 20 July 2003

SriLanka, presented papers and chaired technical sessions in COPEDEC VI, Sep 15-19 2003

Germany Visiting Professor to Univ. of Wuppertal, invited by DAAD, Germany 10May - 10 July 2004

Canada To present a paper in 23rd Intl. Conf. On Offshore Mechanics & Arctic Engg (OMAE '04) 20-25 June '04, Vancouver.

Hongkong To present a technical paper, chairing a session in 14th Asia Pacific division of International Associ of Hydraulic Research (APD of IAHR), 15-18th Dec 2004 in Hongkong and to also present the preliminary arrangement for 15th APD of IAHR to be held in IIT Madras in 2006.

Germany, Visiting Scholar to University of Cottbus under Erasmus Mundus Program of European union from 6^th May to 6^th July 2005

Canada, To present a paper in 2^nd Annual Canadian Research and Hazards Networking Symposium, 17-19 Nov '05, Toronto, Canada

U.A.E, To present a few papers in 1^st International conference and exhibition in coastal zone management and engineering, Dubai 27-29 Nov 2005.

Germany Visiting Professor to Univ. of Wuppertal, invited by DAAD, Germany 10 May –10 July 2006.

Italy To present a paper in 2nd workshop on coastal processes and port Engineering, 29 May -1 June 2006, Univ of calabria-Cosenza, Catania.