 It has been claimed that this made the ship's sleek hull shape, but that seems unlikely to be true as ships of similar length/width ratio have been built with windows along the entire hull.Whatever the shortcomings in their initial design, though, the new sisters were advanced on the technological side.The most striking feature in the ships was their Turin polytechnic-designed funnels, which consisted of an intricate trellis-like pipework (instead of the traditional even surface) to allow wind to pass through the funnel, and a large smoke deflector fin on the top.