What effect does operating at semi-displacement speeds have on boat handling?

Operating a boat at semi-displacement speeds typically results in a bow-up trim, which can contribute to sluggish steering responses. At these speeds, the hull is partially submerged, leading to a rise in the bow. This orientation causes increased drag and can make it more challenging to execute sharp turns or quick changes in direction. The elevation of the bow can reduce the hull's ability to cut through waves effectively, leading to a more cumbersome navigation experience as it may require more effort to turn the boat.

In contrast, quick response to steering changes, level trim, and improved fuel efficiency are characteristics more associated with different speed ranges or hull designs more optimized for planning or displacement speeds. Consequently, when operating at semi-displacement speeds, the resulting bow-up trim contributes significantly to the boat's handling characteristics and responsiveness to steering inputs.