The trough is 85 metres long and 12.2 metres wide and is supported on two 36 metre long 10 metre in diameter cylindrical floats submerged in two 60 metre deep float chambers. The floats are internally sub-divided into three separate chambers. Each of these chambers is filled with air compressed to a pressure appropriate to its depth in the float chamber in order to prevent implosion. The floats provide buoyant lift equivalent to 5,400 tonnes, enough to balance the weight of the trough and its load of water and ship. The trough is set in motion using four worm geared shafts, 27.3 metres long and 42 centimetres in diameter moved by eight 44 kW electric motors. Because the trough and its load are in equilibrium with the floats only the friction opposing the troughs movement needs to be overcome by the motors. A complete lift can be achieved using less than 500 kW of power.