Gatun Lock, Panama Canal
The Panama Canal has a series of "Locks", which allow ships to sail along the Canal, even though the elevation changes across the Isthmus of Panama.
Water is either pumped in to float a ship higher, or drained out to equalize the water level in two adjacent locks. Then the Lock doors are opened, and the ship moves into the next Lock.
Opening a Lock, Panama Canal
Ship in Gatun Locks, Panama Canal
Ship in Gatun Locks, Panama Canal
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