Grégory Mathieu has served as a hydrographer for French hydrographic service (SHOM) since 2006. In 2010, he was promoted to administrator of the computer systems on board SHOM fleet vessels. Having participated in many campaigns at sea as a hydrographer, he now brings his expertise to various projects related to the collection and processing of data. DORIS is one of these projects and is carried out in collaboration with IFREMER.