Define the term "draft" as it pertains to ship design.

Draft refers to the vertical distance measured from the waterline down to the lowest point of the hull, which is typically the keel. This measurement is crucial for various reasons, including ensuring that the ship is within safe limits for navigating shallow waters and determining the weight of the vessel when loaded. Understanding a vessel's draft is essential for avoiding grounding and for compliance with local navigation regulations. It plays a critical role in stability and buoyancy, influencing how the ship behaves in different sea states. The other choices, while related to ship design, do not capture the specific meaning of draft. For instance, the overall length of the vessel is connected to overall dimensions, while weight and angles pertain to cargo and structural positioning rather than the draft itself.