Question 1933 Deck Safety

The correct answer is C) rolling increases. Bilge keels are hydrodynamic structures attached to the bottom of a ship's hull, near the waterline. Their primary function is to dampen or reduce the rolling motion of the vessel, especially in rough seas. As the rolling motion of the ship increases, the bilge keels become more effective in counteracting this roll, providing greater stability and reducing the amplitude of the rolling. The other options are incorrect because they do not directly relate to the effectiveness of bilge keels in dampening rolls. Increased pitching, decreased draft, or increased list would not necessarily make the bilge keels more effective at their primary purpose of reducing rolling motion.