What is the upper edge of a vessel's side called?

The upper edge of a vessel's side is known as the gunwale. This term refers specifically to the uppermost structural element of the boat's sides, which provides strength and support to the hull while also serving as a rail for safety. The gunwale plays a crucial role in the vessel's overall stability and is often the point at which accessories and equipment, such as fenders and lines, are secured. Understanding the terminology related to various parts of a boat, including the gunwale, is important for safe operation and navigation on the water.

The bow refers to the front of the vessel, the stern is the rear part, and port indicates the left side when facing forward. Each of these other terms describes a different part of the boat rather than the upper edge of the sides.