What is an X-BOW (XBOW)? What is an X-Bow ship? 

This video will explain to you what is an X-Bow. In ship design, it is sometimes called an inverted bow or reverse bow. Essentially it is a ship´s bow whose farthest forward point is not at the top. The result may somewhat resemble a submarine’s bow. Their main advantages are, maximizing the length of the waterline and having a better hydrodynamic drag than regular bows.