RTsys to be represented by Nautilus Marine Service

RTsys, a French company specialised on underwater acoustic monitoring and AUVs and Nautilus Marine Service have signed a cooperation agreement that installs Nautilus as the sole representative for RTsys products in Germany.

RTsys stands out from the crowd thanks to its innovations developed in partnership with research laboratories. Thanks to its core technology Powered by SDA the RTsys product range has grown rapidly. The company has also developed its own drones and sonar systems for both civilian and military applications. In times of increasing acoustic pollution in the sea Nautilus Marine Service now complements their acoustic portfolio with state of the art noise recorders for environmental monitoring.

RTsys is involved in many European projects (so z.B. MSFD, JOMOPANS) and has developed adapted solutions for its customers. Their recorders and buoys can have 4 channels (synchronous acquisition) and record at a high sampling rates.

Please contact us for further information of RTsys’ products and solutions.

Hydrodynamic Survey of EMS Estuary with RBRconcerto3 Data Loggers

The Ems estuary is located along the border between Germany and the Netherlands. Ongoing human activities (e.g. deepening the channel) over the past decades has increased tidal amplification and asymmetry and led to a strong flood-dominant transport of sediments.

The present lower Ems has transformed into a hyper-turbid state and is characterized by thick and mobile fluid mud layers with thicknesses of 2m and more and suspended solid sediment concentrations of up to some hundred kg/m3.  This situation is critical from the point of economy as well as from the point of ecology.  To study the exchange mechanisms between the outer Ems and the lower Ems an ambitious survey programme with participation of 15 mainly Dutch or German authorities, institutes and universities, like Dutch Rijkswaterstaat, research institute Deltares or the Federal German Waterways Engineering and Research Institute BAW.

One part of the programme was a monitoring network to measure hydrodynamics and salinity intrusion into the estuary.  For this purpose BAW has used combined mooring frames comprising ADCP and RBR concerto instruments. RBR has been chosen due to their small construction and the possibility to add additional sensors – like in this case Seapoint STM turbidity meter.

During two 4-week deployments RBRconcerto3s collected near bottom data of salinity and turbidity. Turbidity data have been calibrated in the lab against suspended solids concentration.