Damen Marine Components will supply FLEX tunnels, propeller nozzles, manoeuvring systems and rudders for two innovative inland tanker vessels to Rensen-Driessen Shipbuilding from Zwijndrecht, the Netherlands. The newly developed tankers by RDS are based on the series of four large ‘XXL tankers’ that have been built between 2017 and 2020 at the yard. The new tankers will be equipped with each two FLEX tunnels, two propeller nozzles and two manoeuvring systems with four rudders. Propellers of a large 2 meter diameter have been selected, which provide efficient propulsion under all circumstances. Van der Velden FLEX tunnels under the hull ensure optimal water flow to the propellers. The wings that construct the duct under the hull in front of the propellers, can be flipped up towards the hull and down to create the tunnel. When the tanker navigates deep water with a full load, the wings can be in the up position, as the propellers will be fully submerged to generate thrust. On shallow water and with limited draft, the wings will be flipped down, so the water will flow under the hull towards the propellers, that will still be fully submerged in the flow towards them. This allows to uphold operations at quite low water levels This concept has proven successful: 13 vessels with FLEX tunnels are operational and 7 more are under construction.The new XXL tankers will be equipped with two propellers with each a nozzle. Behind this, two independently operated Van der Velden HD 240 two-rudder systems are installed. Each set of connected rudders has an asymmetrical 60–80 degrees rudder angle, that generates optimal thrust in the water. Even at very low speed, excellent manoeuvring capabilities are ensured. To be able to take as much liquid as possible in the Amsterdam-Rotterdam-Antwerp sailing area, the vessel measurements are impressive. At 135 meter length and 22 meter beam, the vessels are categorised XXL. Performance of earlier XXL tankers, providing 13000 deadweight, is very promising. New customers at RDS therefor chose for this vessel concept.Like the earlier XXL tankers, the new vessel design is conceived by RDS together with Rommert Ship Design and completed for improved hydrodynamics by DMC. Knowledge gathered in earlier projects was applied. Cooperation of the yard and DMC is very smooth, resulting in state-of-the art vessels.The casco’s will be built in China to arrive in The Netherlands end of 2023 for completion.