Bulbous stern

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Bulbous Stern

A bulbous stern, or stern bulb, works to decrease a vessels stern wave for greater efficiencies (analogous to bulbous bows). Resistance reductions have been noted in models & vessels in the range of 5%[1]. Compared to bulbous bows, stern bulbs can be more difficult to design - as the boundary layer tends to seperate in the aft of the vessel, and placement can be complicated by the positioning of steerage and propulsors.

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