Fast Pilot Boat "Nübbel" at the shipyard - view of the boat's pfh hull.
<a href="//commons.wikimedia.org/wiki/User:Strandkrabbe" title="User:Strandkrabbe">Strandkrabbe</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>