The objectives were (1) to recover acoustic ranging data logged by the Geomar and LGO acoustic transponder networks since the previous data recovery cruise (on R/V Yunus, May 4 and 5, 2017) (2) to recover as many of the 4 LGO "Fetch" acoustic transceivers as possible (4) to deploy at the seafloor the BPR mooring frame prepared by DT-INSU for bottom pressure and current recording. All the equipment shipped by GEOMAR (from Kiel), LGO and DT-INSU (both from Brest) were on board as well as 4 wooden boxes prepared for the return shipment of the LGO geodetic beacons. The Geomar beacons remained silent, but data could be downloaded from 3 or the 4 LGO beacon, thus providing measurements of all baselines of the French network; 2 of the 4 LGO acoustic beacons (Figure 1) were recovered. The BPR was successfully delivered to the seafloor. The complete set of data available from both geodetic networks, including the data back to the installation with RV Pourquoi Pas? end of 2014, was exchanged in-between the science party.