Industrial Automation branch INA The historic Weser ferry Varenholz transports hikers and cyclists without a propulsion engine, but with the help of the flow of the river. The crossing depends not only on the ferry staff's roster, but also on environmental factors. The on-site sensors determine not only the weather conditions but also the water level and wind strength. The data collected with this is compiled on a dashboard of the Kalletal and determines the timetable for the walkers and cyclists.