Lock (water navigation)
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A lock is a device used for raising and lowering boats, ships and other watercraft between stretches of water of different levels on river and canal waterways. The distinguishing feature of a lock is
Canal lock and lock-keeper's cottage on the Aylesbury Arm of the Grand Union Canal at Marsworth in Buckinghamshire, England
Lock on the River Neckar at Heidelberg in Germany
Three Gorges Dam lock near Yichang on the Yangtze river, China
Operation of a canal lock 1–3. Boat enters 'empty' lock 4. Bottom gates are closed, bottom paddles closed, top paddles opened, lock starts to fill 5. Lock is filling with water, lifting boat to the higher level
Welland Canal
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The Welland Canal is a ship canal in Ontario, Canada, and part of the St. Lawrence Seaway and Great Lakes Waterway. The canal traverses the Niagara Peninsula between Port Weller on Lake Ontario and Po
A ship in Lock 3 of the Welland Canal in St. Catharines, just south of the Homer Lift Bridge and Garden City Skyway
A lock of the second Welland Canal
Aerial photo of Port Dalhousie from the third canal era. 3rd canal lock at left, 2nd canal lock at right. Note 3rd canal towpath at upper left and Muir brothers' ship yard centre right.
Abandoned locks of the third canal