What occurs when a planing hull is in displacement mode?

When a planing hull is in displacement mode, it behaves similarly to a traditional displacement hull. In this mode, the hull moves through the water at lower speeds, generating a significant amount of resistance due to its design, which is built for stability and smooth passage through the water rather than speed. This mode represents how boats are designed to push water aside as they move, rather than rising up and skimming on top of it like they would at higher speeds in planing mode.

The characteristics of displacement mode include the hull efficiently cutting through the water, maintaining stability, and providing a comfortable passage. This is crucial for understanding how different hull types perform at varying speeds and under different conditions. A boat with a planing hull will transition to planing mode as speed increases, allowing it to reduce drag and travel faster, but at lower speeds, it functions like a more conventional displacement hull.

The other options describe different behaviors associated with planing hulls at other speeds or modes, but when in displacement mode, the primary function is akin to cutting through the water efficiently and effectively at lower speeds.