An artefact ship can move through water without disturbing it as if it were part of the water itself. As the vessel is inhabited by a water elemental or bonded to the anima of a Terrestrial Exalted this is actually true. A vessel of frost jade can move as easily over the frozen sea as snow over ice. A vessel of fire jade can travel through rivers of burning rock.
   Earth jade is extraordinarily hard and requires age of strenuous hammering to craft it into shape. It's far stronger than most tools used to craft it as a result they have to be repaired or replaced frequently. Jade can survive any condition of it's Elemental Pole. It was intended to be the bodies of elementals.
   Artefacts made from jade are the houses of elementals. The Dragon-Blooded are representations of the living things of Creation just as they are descended from their forebears. Their artefacts aren't just objects but living weapons.