Which statement about displacement hull advantages is correct?

Which statement about displacement hull advantages is correct?

• A. It uses less power but sacrifices ride quality
• B. It displaces water equal to weight and has a smooth ride, but slower top speed
• C. It achieves the highest speed with minimal power
• D. It requires significant power to get on plane

Answer: (B)

Displacement hulls move through the water by pushing water aside, so the hull must displace a volume of water equal to the boat’s weight to float. That buoyancy gives a very smooth, comfortable ride because the hull continually interacts with the water rather than bouncing on top of it. However, as you push toward higher speeds, wave-making resistance rises quickly, so the top speed stays relatively slow. This combination—buoyancy-driven ride with a natural speed limit—defines displacement hulls. So the statement that correctly captures the advantage is that it displaces water equal to weight, provides a smooth ride, and has a slower top speed. The other options describe scenarios that don’t match how displacement hulls behave: they don’t emphasize a smoother ride while limiting speed, and they imply higher-speed capability or high power to get on plane, which is not characteristic of displacement hulls.

Displacement hulls move through the water by pushing water aside, so the hull must displace a volume of water equal to the boat’s weight to float. That buoyancy gives a very smooth, comfortable ride because the hull continually interacts with the water rather than bouncing on top of it. However, as you push toward higher speeds, wave-making resistance rises quickly, so the top speed stays relatively slow. This combination—buoyancy-driven ride with a natural speed limit—defines displacement hulls.

So the statement that correctly captures the advantage is that it displaces water equal to weight, provides a smooth ride, and has a slower top speed. The other options describe scenarios that don’t match how displacement hulls behave: they don’t emphasize a smoother ride while limiting speed, and they imply higher-speed capability or high power to get on plane, which is not characteristic of displacement hulls.