The operation consists of the subject of additional oceanographic studies for an application for environmental authorisation necessary for the carrying out of dredging works and full land constitutions. The aim is to carry out environmental studies for the project to extend the port of Galisbay. Obtaining the DAEU is crucial to meet the environmental code for dredging at 9 m. Access to commercial vessels in Galisbay that can carry up to 1500-1700 TEU and cruise ships with a maximum length of 200 m