V-bottomed boat, along which a sharp angle is formed, is referred to as the Chine. This is an important attribute in boat design and integral to the performance and stability of the vessel while in water. The exterior angle, or Chine, can be soft or hard, indicating the sharpness of the corner where the bottom of the boat meets the sides. A hard chine demonstrates a distinct angle, while a soft chine signifies a more rounded, steadily changing angle.

-bottomed boat. 1. The chine of a small motorboat helps stabilize it by adding more surface area for water contact. 2. In rowing boats, the smooth transition from the side to the flat bottom at the chine ensures easy movement and less water resistance. 3. An improperly built chine could result in a leaking boat which is why it is critical to pay attention to this intersection while constructing the vessel. 4. A distinct, angular chine is observed in most modern speed boats for its advantage in high speeds. 5. The chine of a traditional canoe is slightly curved to promote stability and efficient movement even in choppy waters.

shaped boat is known as the 'chine'. Interestingly, in traditional Chinese shipbuilding, the chine is not used. Instead, Chinese boats and ships, including the famous Chinese Junk ships, are typically built using a method known as edge-joined planking. This construction technique omits the need for a chine, forming a smooth curve from the bottom to the sides of the vessel. This not only lends Chinese ships their distinct appearance but also provides greater structural integrity and causes less hydrodynamic drag, enhancing the sea-worthiness of the vessel. What makes this even more fascinating is that this design innovation predated western shipbuilding techniques by hundreds of years, again showcasing the advanced nature of ancient Chinese civilization.