What is a cleat used for on a vessel?

A cleat is a metal fitting on which a rope can be fastened, serving a crucial role in securing lines on a vessel. Cleats typically have two projecting arms (horns) that allow a rope to be wrapped around and held in place, facilitating the control and management of various lines, such as dock lines or anchor lines. This fastening method is important because it ensures stability and safety while the vessel is moored or anchored.

The other options pertain to different aspects of a vessel's operation or structure. The reference to rotating and powering a boat may relate to the engine or motor, which is responsible for providing propulsion. The left side of a vessel refers to the port side, and the front of a vessel is known as the bow. Understanding the specific function of a cleat is essential for boat handling and mooring, as it helps in managing the vessel securely while docked or at rest.