Trade · 6 pages · 12 min
How a lock moves a boat between levels
A lock raises or lowers a ship by filling or emptying a chamber until the water matches the next level.
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From the opening
A lock is a chamber with gates at each end that lets a ship change water level without climbing over the difference. Valves fill the chamber from the higher side or empty it to the lower side, and the ship rises or falls because it is floating the whole time. The opening covers gates seal a chamber, valves fill or empty it, and the ship floats through the change.
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Inside
- Gates seal a chamber
- Valves fill or empty it
- The ship floats through the change
- Chamber size limits the hull
- Where the idea stops applying
- A distinction worth keeping
Sources
- Pound lock operation
- Canal lock chambers