Every ship carries a statement or drawing showing where the various different materials are used in the ship's structure, as it is necessary to know the type of material when painting, chipping or welding, in order to avoid the wrong treatment .
Inqanawa nganye iba nombhalo okanye umzobo wokubonisa apho zisetyenziswe khona izixhobo ezahlukeneyo kwisakhiwo senqanawa, nanjengoko kubalulekile ukulwazi uhlobo lwesixhobo xa kupeyintwa, kutshentulwa okanye kuweldwa, ukuze kuphetshwe ukuphathwa ngendlela engalunganga.