Drawing showing the peculiar inter-wing bracing structure of First World War sea-pursuit floatplane <a href="https://en.wikipedia.org/wiki/en:Hansa_Brandenburg_CC" class="extiw" title="w:en:Hansa Brandenburg CC">Hansa Brandenburg CC</a>.
<a href="//commons.wikimedia.org/wiki/User:MLWatts" title="User:MLWatts">MLWatts</a>
<span class="int-own-work" lang="en">Own work</span>