This is an artform; the boat fundis (building experts) have no written plans. The requirement for a good boat is a strong keel and a sturdy set of ribs. (Sort of what any boat needs, eh!) The keel is usually made of makuti (mangrove) as are the ribs. The side planks are mbamba-kofi (red mahogany). Important finishes include jumvi matting (made from woven palm leaves) for splash protection.