Locks (water navigation)

fall structure with a fixed chamber in which the water level changes

thumb|upright=1.5|The Slussen area looking north in June 2021. In the foreground is Katarinavägen, with the Slussbron (Golden Bridge) to the right and Gamla Stan (Old Town) in the distance.

standards determining vessel sizes on rivers and canals of Europe

standard governing the dimensions of the locks of some canals

group of locks at the Panama Canal

dam in Pakistan

form of lock gate consisting of a large floating iron or steel box

barrage in Punjab, Pakistan

gate in the flow of a river which could be opened to allow boats through

barrage in Punjab, Pakistan

job responsible for managing a lock

thumb|Krabbersgat naviduct, near Enkhuizen, Netherlands (Photo: Rijkswaterstaat) thumb|Naviduct control tower