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It is a system of gates to allow ships to move up or down from 1 level to another. The vessel moves into the lock & water is allowed to either leave or enter the lock to change the level, when the water equalizes to the new level, either up or down, then the next gate can be opned to allow the vessel to move on. Because the levels in the Red Sea & the Meditteranean are the same there was no need for a lock system in the Suez Canal.

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17y ago

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