Geobrest 2018 is a teaching campaign directed by UMR 6538 Géosciences Océan from IUEM / UBO. It corresponds to a 10 days scientific cruise on board the R/V Côtes de la Manche. This program is dedicated to teach to master level student: 1) different methods of marine geology and geophysic on shelf and coastal area, 2) principles and bases of organisation and autonomy for data acquisition at sea. Different methods include sparker and boomer seismics, sea floor rock sampling, shallow depth coring, multibeam and sonar data acquisition. The 2018 program is in the continuity of teaching campaigns realised on board R/V Côtes de la Manche from more than 10 years. It offers a large autonomy to access to the peri-armorican continental shelf. The scientific topic addressed by this training period at sea is the geological evolution of continental shelf: structural and morphological description, sedimentary record. The continental platform of Atlantic and Channel domain is now very studied in order to understand for example quaternary sedimentary record in response to climatic and tectonic signals. The wide armorican shelf along the Armorican Massif, as well as the Brest natural harbour allow this type of study within few days at sea. In 2018, we focus our interest on the Glenan area and Concarneau bay.