Well it's a question of odds. Hard to imagine you couldn't get a big auger, drill a bunch of holes, put a bunch of telephone poles into the holes and start run

Well it's a question of odds. Hard to imagine you couldn't get a big auger, drill a bunch of holes, put a bunch of telephone poles into the holes and start running steel cables + winch from each one to the end of the ship. Repeat on the other end of the canal/ship and start applying ever more force to realign the ship with the canal. Question is, what would happen? Would the ship move the sand it's embedded in, realign with the deepest part of the channel and move off? Or would the (potentially already damaged) hull breach?