What is critical speed in vessels?

Critical speed in vessels refers to the speed at which the natural frequency of a ship's hull structure coincides with the frequency of wave patterns in the water. When a vessel operates at this speed, it can experience amplified motions and vibrations, potentially leading to structural stress or instability. This phenomenon is particularly important in naval architecture and marine engineering, as it can affect a vessel's safety and performance. Avoiding critical speed is crucial during design and operation to ensure safe navigation in varying sea conditions.