shipwrecklarge02.nif has material data mistakenly flagged as "SKY_HAV_STONE" when it's clearly a wooden ship (with wooden stairs), so the only materials that it should have are WOOD and STAIRS_WOOD. The same issue applies to shiplargekatariah02.nif, which should be a mix of WOOD, STAIRS_WOOD, and SOLID_METAL, but is mistakenly given a STONE material.
both meshes are located in \meshes\dungeons\ship.