For the positioning of the vessel and of course in all phases of data acquisition is used a system with the DGPS correction sub-meter (signal L1 of the network correction Fugro). In detail, the receiver who is under the Geonautics Srl is the model Sea Star 9200G2 to 72 channels with PPS output signal which guarantees thus the correction of the synchronization of the times between the various devices (especially of great importance especially during The execution of bathymetric analysis with methodology MBES). Also always Sea Star 9200G2, has the opportunity to receive differential correction mode RTK (real time kinematic) directly from the network Fugro ensuring accuracy of 0.1m on the measure horizontal and vertical extent of about 0.15m.