It is not usual to have a congress solely and exclusively on this subject since conservation in underwater conservation is usually just one chapter among many others related to archaeology. Throughout the different sessions, it became clear that the two disciplines (archaeology and conservation) are highly interconnected despite their current separation. This connection lets us fantasise about applying the latest technological advances to safeguard the underwater archaeological heritage. It is essential to highlight all the technological innovations in research projects presented and which will be an inspiration for current and future generations of restoration-conservation professionals, as well as for other, direct or indirect, roles in archaeology.

The #ISCUA was created for this purpose, to bring together professionals in the field of underwater conservation and restoration (students, researchers, companies and related institutions) in a single triennial event. It was the place to exchange ideas and experiences with full scientific, academic and professional rigour. It was the ideal context for specialised, up-to-date and quality training. It made it possible to transform the distance between all the researchers into a more intimate and collaborative environment, creating solid personal and professional relations stimulated by a shared preoccupation with the preservation of UCH.