This complete structure is buoyant and pulled down via cables and a pulley system with water based hydraulic cylinder to the desired depth. All components including structure, cables, etc. are sized taking all safety factors into consideration. When you set the movable floor to the desired depth using the touchscreen, the floor is pulled underwater and water slowly flows through the s... https://hedgedoc.digillab.uni-augsburg.de/7iEQdYzCSnKCj_NZlSpaxQ/