What does the term 'prop wash' refer to?

The term 'prop wash' specifically refers to the flow of water generated by the propeller of a boat. When the propeller spins, it pushes water backward, creating a current that flows around and behind the stern of the vessel. This flow plays a critical role in maneuvering the boat, particularly when it comes to controlling speed and turning. Understanding prop wash is essential for effective docking, as it can impact how the vessel moves in tight spaces.

The other options relate to different phenomena associated with boating but do not accurately describe prop wash. For example, engine noise refers to the sound produced by the engine itself, which is unrelated to the movement of water. The splashing of water over the bow concerns the boat's interaction with waves or rough conditions, while wave motion pertains to the energy and oscillation of the water surface, which are not generated by the propeller. Thus, recognizing that prop wash is specifically the water flow created by the propeller clarifies its importance in navigation and handling a vessel.