 This is practical only where the block coefficient of the hull is not a significant issue.Since semi-displacement and planing hulls generate a significant amount of lift in operation, they are capable of breaking the barrier of the wave propagation speed and operating in realms of much lower drag, but to do this they must be capable of first pushing past that speed, which requires significant power.This stage is called the transition stage and at this stage the rate of wave-making resistance is the highest.