The stem can be a single casting or forging, or, like the keel, can be built up of shaped plating and sections .
Umva wenqanawa usenokuba yinto eyenziwe ngesinyithi esinye okanye ngento ekhandiweyo, okanye efana nesiseko senqanawa, usenokwakhiwa simile oku kwesigqumo nanje ngamacandelo.