Documentation and conservation of Underwater Cultural Heritage are crucial to preserve humankind’s history and traditions. The TECTONIC project will promote an intersectoral collaboration between academic and non-academic professionals (technical experts, archaeologists, conservators, geologists, engineers, and computer scientists) working on different topics related to the Underwater Cultural Heritage. It will also support the exchange of skills and expertise among them to respond more efficiently and find new solutions to the complex existing issues in Underwater Heritage.