Rudder areas are smaller for the same reason as the keels . Each rudder is more effective as it works upright deep in the water. This again makes them more efficient with smaller appendages. Windward performance in rough water is superior because of the roll and pitch dampening abilities of the keels . Windward ability equal to that of an ordinary yacht is achieved on a fixed draft approximately comparable to that of a centerboarder without the problems associated with lifting foils.
Stability is equal to that of an ordinary yacht without recourse to extreme beam .
Righting moment and range of stability are at least equal to those of a well designed centerboard yacht of relatively deep fixed draft. Because ballast can be placed in each fin, the ballast is as low as any keel-centerboard. The boat can take groundings in a level position . An additional advantage to the twin keels is the ability to ground the boat for bottom cleaning and painting without the cost of a haulout. Twin keels also allow the boat to be shipped without cradles.