What would be the likely consequence of having a low freeboard?

Having a low freeboard, which is the distance between the waterline and the upper deck level of a vessel, directly increases the risk of swamping. When freeboard is low, the vessel is closer to the water's surface, making it more susceptible to waves splashing over the side or when the boat pitches or rolls. This situation creates a higher likelihood for water to enter the vessel, thus increasing the risk of swamping, which can lead to capsizing or sinking if the water accumulation is not managed.

In contrast, options referring to increased speed, improved buoyancy, or better control in rough waters do not accurately reflect the effects of low freeboard. A low freeboard does not inherently enhance a vessel's performance in these areas and may actually compromise safety and stability.