Question 2529 Deck General

The correct answer is D) Fresh water line. The fresh water line is the mark indicated by the letter C in illustration D003DG. This line represents the maximum draft when the vessel is loaded with fresh water, which has a lower density than salt water. The fresh water line is a regulatory requirement to ensure the vessel's stability and safety when operating in areas with fresh water. The other answer choices, such as summer water line, winter North Atlantic water line, and tropical water line, represent different load lines based on the vessel's operating area and season. However, they are not the mark indicated by the letter C in this specific illustration.