double vertical ship lift Scharnebeck Lüneburg built in 1974
In them, the ships overcome a height level of 38 meters in a giant elevator.
The weight of a water-filled trough with 100 meters of usable length, 12 m width and 3.40 m depth of water with or without boats, always 5 800 t, displace as ships moving in and out as much water from the trough as they weigh themselves.