The sail of the USS Sturgeon is _big_. The Sturgeon was the lead shp of her nuclear attack submarine class and her sail is now outside the Naval Undersea Museum at Keyport, WA
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/7489441@N06">Clemens Vasters</a> from Viersen, Germany
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/clemensv/6773672846/">Sail of USS Sturgeon (SSN-637)</a>