Diagram showing different types of ship hulls.
<a href="//commons.wikimedia.org/wiki/User:Jkwchui" title="User:Jkwchui">Jkwchui</a>
CC BY-SA 3.0
vectorized from <a class="external free" href="https://en.wikipedia.org/wiki/File:Hull_Drawings.jpg">http://en.wikipedia.org/wiki/File:Hull_Drawings.jpg</a>