There's something remarkable about a boat travelling uphill. Canal locks are a simple yet ingenious system that has made it possible for centuries. Locks are beautifully simple: seal a chamber around the boat, adjust the water level, and carry on at a new height. Engineering at work!
A lock raises or lowers a boat by changing the water level in a gated chamber. Explore Outforia’s canal section for a simple lock explanation.

Lock In Canal
Moving Ships Through Locks #Education #Ships #Boats #Locks #Kids
How does a narrowboat travel uphill on a canal? Canal locks work a little like water lifts for boats. First, water is lowered inside the lock to match the canal level. The gates open and the narrowboat enters. Then water flows into the lock from the higher level, gently lifting the boat until it reaches the level of the canal ahead. Finally, the gates open and the journey continues. Follow Molly May, Gran and Pip as they discover the fascinating world of Britain’s canals, locks and waterways.


Lock In Calendar
Diagram of a canal pound lock, invented in the 10th century and written of by Shen Kuo.


upper chamber of Ardnacrusha lock, Ireland, photo: BJ Goggin
Canal Lock Gate
Navigating Europe's fascinating canal locks plays a great role on a luxury barge cruise. Learn their history, how they work and their future in our guide...
The story of our canals : Hutchings, Carolyn : Free Download, Borrow, and Streaming : Internet Archive








Devizes Lock
Learn all about how canal locks that connect bodies of water with different heights work through this post that includes several different videos.