GRASM has trained divers capable of reaching depths of up to 100 meters to explore and document wrecks and historic sites. Some of its most notable projects include:

• The discovery of an ancient dump dating from the 3rd-4th century BC;

• The Saracen wreck of "Plane 3";

• The Roman port of Laurons in Martigues;

• The Roman wreck loaded with tiles from the Calanque de l'Âne in Frioul.

Over the course of five decades, GRASM has contributed to the discovery and study of numerous sites, resulting in 13 scientific publications. Its discoveries, such as those made in Anse du Pharo or on the Tiboulen de Maïre wreck, have enriched our understanding of the Marseille region's maritime past.

Today, GRASM, perpetuating Serge Ximènés's legacy, focuses its activities on recreational and professional training. Drawing on his experience in underwater archaeology, he will develop an archaeology training module in the coming years as part of the Bb (underwater archaeology) program.

Over the years, GRASM's work has marked the history of archaeology in France, with major discoveries that continue to fascinate maritime history enthusiasts.

For several years now, and in order to ensure the sustainability of the center's activities, Katia, Serge's daughter, has been ensuring its legacy with a structured team focused together on preserving the biodiversity of the underwater environment and respecting the fauna and flora.