Propeller Wash

The turbulent flow of water generated by a vessel’s propeller as it moves through the water, often creating strong currents and turbulence behind the boat. 

Propeller wash is the disturbed water flow caused by the rotation of a vessel’s propeller. As the propeller spins, it accelerates water backwards, generating thrust that propels the boat forward. This movement creates a turbulent wake, which can be particularly strong in high-powered vessels or when operating at high revolutions per minute (RPM). The force of the wash can affect nearby boats, docks, and marine structures, sometimes making manoeuvring in tight spaces more challenging. 

In shallow waters, propeller wash can stir up sediment, reducing visibility and potentially damaging marine habitats. It is also a factor in vessel handling, as excessive wash can impact a boat’s ability to maintain control, especially at low speeds or when reversing. In busy harbours and marinas, operators must be mindful of their propeller wash to avoid disturbing moored boats or creating hazardous conditions for smaller craft.