Only a portion of it was grounded, not the full length of the ship. Someone linked a BBC article stating that they shifted 27,000 cubic meters of sand, so ther

Only a portion of it was grounded, not the full length of the ship. Someone linked a BBC article stating that they shifted 27,000 cubic meters of sand, so there you go, they could likely remove a meter under the whole thing in a similar amount of time (probably longer to cover area instead of digging down, but that isn't what they would need to do).