What if they offloaded the containers from the front 1/3 or so and then used a high volume water pump and hose to blast the sand from below the bow?
I think that the combination of making the front lighter and dispersing the sand would make it feasible to tug out.
Just my Sunday thought while reading into the Suez situation.
What if they filled the ballast tanks with helium, tied a string to the Evergreen and just wait for a gentle breeze to float it out. ?
Well it was a strong gust that got it stuck so helium isn’t that far fetched.?