The Suez Canal ran aground and the freighter got out of trouble due to the tide

The Suez Canal has been blocked for several days due to the stranding of the "Changci" freighter, and the progress of the freighter's relief has affected the global attention. According to the latest news, Egypt's Suez Canal Authority issued a communique on the 29th, saying that the stranded freighter has completely extricated itself and the Suez Canal has resumed navigation.
Why can this 400 meter ship be pulled out in a short time? What is the reason behind this?


According to foreign media reports, the best time for the rescue of the "Changci" freighter is on the 28th or 29th, because it will coincide with the full moon. With the change of tide, it may be helpful for the freighter to solve its difficulties.
According to the report, on the evening of the 28th, the giant freighter "Changci" finally got the help of more powerful forces than any on-site machine: the moon and the tide. Rescue officials said that as the water level soared overnight, the ship slowly regained its buoyancy.
So on the morning of the 29th local time, we received the good news that the hull had been adjusted 80 degrees in the right direction.
Tide is the fluctuation of the sea water on the earth caused by the gravitational action of the moon and the sun. People call the force that attracts the rising tide of sea water as the tidal force. Generally, the tide generating force is greater in the place facing the moon, while the tide generating force of the sea water facing the moon becomes smaller. Because of the centrifugal force, the sea water runs to the side facing the moon under the action of the centrifugal force, so the tide will also rise.
At full moon and new moon, the sun, the earth and the moon are on the same line. At this time, the sun's gravity and the moon's gravity are in two opposite directions or in the same direction, so the ocean tide reaches its climax.
Therefore, when the engineers judge that there is a full moon, they can use the maximum force of rising sea water to float the freighter upward to help the freighter out of trouble.
Although the freighter has begun to move away from the West Bank of the canal, who is responsible for the accident? It is reported that the interruption of the canal caused a loss of about 400 million US dollars per hour in Global trade, equivalent to about 67 million US dollars per minute. With the disruption of Suez shipping, the price of a container from China to Europe rose to $8000, nearly three times higher than a year ago.
German insurance giant Allianz Group reported on the 27th that the Suez Canal stopper is the last straw to crush Global trade.
Since the beginning of this year, the delivery time of suppliers has been extended, and European delivery time is longer than that of COVID-19 peak. According to the report, the delivery time in the United States has doubled, and the inventory has been reduced in anticipation of the large-scale US government revitalization plan to stimulate demand.