Evergreen Shipping line, is one of the world’s largest container ships, about the length of the Empire State Building.

Although the canal was originally engineered to handle much smaller vessels, its channels have been widened and deepened several times, most recently six years ago at a cost of more than $8 billion.

Poor visibility and high winds, which made the Ever Given’s stacked containers act like sails, are believed to have pushed it off course and led to its grounding.

Salvagers have tried a number of remedies: pulling it with tugboats, dredging underneath the hull and using a front-end loader to excavate the eastern embankment, where the bow is stuck. But the vessel’s size and weight, 200,000 metric tons, had frustrated salvagers as of Thursday night.

Some marine salvage experts have said nature might succeed where tugs and dredgers have failed. A seasonal high tide on Sunday or Monday could add roughly 18 inches of depth to the canal, perhaps floating the ship.

That depends on how long the canal, which is believed to handle about 10 percent of global maritime commercial traffic, is closed. TradeWinds, a maritime industry news publication, said that with more than 100 ships waiting to traverse the canal, it could take more than a week just for that backlog to clear.

A prolonged closure could be hugely expensive for the owners of ships waiting to transit the canal. Some may decide to cut their losses and reroute their vessels around Africa.

$5.61 billion in revenue from canal tolls in 2020, also has a vital interest in refloating the Ever Given and reopening the waterway.

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