Goalkeeper CIWS (Close-in weapon system) on the Netherlands Navy's frigate HNLMS De Zeven Provincien (F 802).
<a href="//commons.wikimedia.org/wiki/User:Torsten_B%C3%A4tge" title="User:Torsten Bätge">Torsten Bätge</a>
CC BY 2.5
<span class="int-own-work">Self-photographed</span>