What is one effect of sharp turns at high speeds?

When a powerboat makes sharp turns at high speeds, one significant effect can be a loss of propeller power. This occurs because the angle of the boat's hull changes dramatically during a sharp turn, potentially causing the boat to begin to slide or skid across the water's surface rather than maintaining a streamlined path. As the hull rises out of the water or the propeller loses its grip on the water due to the increased angle of attack, the boat can experience a decrease in propulsion efficiency. The vessel may struggle to maintain speed, and the effectiveness of the propeller is compromised, which can lead to a reduction in the boat's overall performance.

In contrast, the other options provide benefits that do not necessarily relate to the dynamics of sharp turning at high speeds. For example, while better control might seem advantageous, sharp turns can lead to instability rather than enhanced control. Similarly, increased fuel efficiency and improved visibility are not direct outcomes of making sharp turns, as the opposite may often be true—the boat may use more fuel due to increased drag or experience obstructed visibility from the turned position. Thus, the concept of losing propeller power is the most accurate consequence of the scenario described.