Aluminium offers a strength to weight ratio that composite cannot match at this scale and that steel achieves only by being heavy. For a yacht carrying twelve guests, their luggage, water, fuel and a tender, saving structural weight means either more speed for the same power or more payload for the same displacement. Plating can be varied through the hull, heavier where it takes grounding loads and lighter above the waterline, which is a precision that moulded construction cannot offer.