A bulbous bow is a protruding bulb at the bow (or front) of a ship just below the waterline. The bulb modifies the way the water flows around the hull, reducing drag and thus increasing speed, range, fuel efficiency, and stability. Large ships with bulbous bows generally have a twelve to fifteen percent better fuel efficiency than similar vessels without them.
Dragged reduced because of trim.
ReplyDeleteShip with "After Superstructure", when she is in ballast trip, normally trim by the stern is excessive (too much). This causes drag. To reduce drag, trim has to be reduced. Bulbous bow containing ballast water used to reduce ship's trim. Hence, the ship will less getting drag, speed will increases and better maneuverability.