We present a tool dedicated to deep archaeological underwater sites exploration by mixing virtual reality technologies and semantic. Virtual reality is becoming more democratic, devices are proposed and efficient softwares are developed. On the other hand, obtaining 3D models from field surveys has also made significant advances, also in underwater context. It is now possible to produce high precision and accurate models of underwater sites in a controlled time. Other works pave the way for the automation of knowledge integration to raw geometry in order to enhance 3D models with semantics.
Based on these results, we propose a tool dedicated to virtual exploration of underwater archaeological sites that provides both photorealistic and semantic oriented view. With such a tool, it is now possible to virtually immerse within sites that are unreachable to humans. The tool relies on an open source virtual reality engine that can display high resolution models and that has been enhanced with controls and semantic displays in order to help archaeologists to fully interact with it. A demonstrator dedicated to the exploration of the Xlendi site, Malta is presented.