“Een bulb in het midden is eigenlijk een onding”, by Peter van Oossanen, Published in “Zeilen”, No. 12, December 1999, pp. 38-48 (ID No. 5105)
This article (in Dutch) describes the advantages of dividing the side force development, and the positioning of lead ballast in the form of a bulb attached to the bottom of the keel fin, on an International America’s Cup Class (IACC) yacht into two parts – one located forwards on the hull and the other aft on the hull – rather than in a single keel fin-bulb configuration in the middle of the hull.