What is the term for the disturbed water left behind as a boat moves through the water?

The term for the disturbed water left behind as a boat moves through the water is called "wake." When a boat travels, it displaces water, creating a turbulent flow that trails behind it. This is observed as waves or a series of ripples spreading outward. The size and shape of the wake can vary depending on the speed and size of the boat, as well as the surrounding conditions. Understanding the concept of wake is important for boat operators because it can affect the handling of the vessel, influence nearby boaters and swimmers, and contribute to shoreline erosion.

The other terms do not accurately describe this phenomenon. "Wave" generally refers to any oscillation of the water surface, which can occur independently of boats. "Swale" typically refers to a low-lying area that collects water, and "ripple" describes small waves or disturbances in water but does not encompass the broader effect created by a moving boat.