The hydraulic channel for free surface measurements is a quite new facility that entered in service during 2002 and is be used for basic fluid dynamics experiments. It is 27 m long, with a 0,6 m 0,6 m cross section. The test section 10 m long. The flow speed can be varied between 0 and 1 m/s. The plant is powered by three pumps, with a total power of about 60 kW. It may also be operated as a towing tank.