The 2740 is built on the same semi-displacement hulls as the old 2665 canyon runner, stretched a few inches on the centerline. Semi-displacement hulls have wider, oval-shaped running surfaces that provide lift, buoyancy and stability. During my sea trial, the 2740 popped right up without humping like a planing hull. I turned the wheel hard over, and the 2740 carved tight, smooth turns, displaying none of the outboard lean typical of some planing cats. Back at the dock, trimming up the outboards revealed Doel-fin hydrofoils, which Glacier Bay says help smooth out the turns.