Which term is used to measure the width of a boat or ship?

The term used to measure the width of a boat or ship is "beam." This measurement is crucial in the maritime industry as it determines the vessel's stability and buoyancy. A wider beam typically enhances the stability of the ship, making it less prone to capsizing, especially in rough water conditions. The beam is measured at its widest point and is a standard method of classification for various types of vessels.

Draft refers to the vertical distance between the waterline and the bottom of the keel, indicating how deep the vessel sits in the water. Length pertains to how long the vessel is from bow to stern, and height generally refers to the measurement from the lowest point of the hull to the highest point of the structure above the waterline, such as a mast or superstructure. Each of these other measurements plays an important role in the overall design and performance of a vessel but does not pertain to its width.