 Whilst there, he encounters Rackham for the final time, killing him in a sword fight.Before escaping in the ship's jolly boat, he is able to set fire to the gunpowder by means of a slow-burning fuse, causing the "Unicorn" (with Rackham's drunken crew and presumably Red Rackham's treasure still aboard) to explode and sink.In the present day, Tintin, his dog Snowy, and his friends Captain Haddock and Professor Calculus follow coordinates that Sir Francis had left his three sons in a strange riddle hidden in three model ships of the "Unicorn".