1. Development of Autonomous Underwater Vehicles (AUVs) 2006 Dec.2006: Organization of the international workshop on ApuuRobo 2006 at Maritime & Ocean Engineering Research Institute (MOERI) – KORDI in Daejeon, Korea Dec.2006: Deployment of the intelligent AUV “r2D4” along the central Indian Mid-Ocean Ridge System March. 2007: Deployment AUV" Tri-Dog1" at "Tagiri" in Kagoshima-bay to develop a new navigation system for AUV using bubbles from seafloor as landmarks Map of Indian Ocean Side scan image of the huge lava plateau Image of the huge lava plateau r2D4 homing