Alexander von Humbolt is an old light ship, hence the green sails. It is now used, amongst other things, for adverts for the Becks brand of beer and is known as the Becks ship in Germany.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/16405999@N00">Bruno Girin</a> from London, United Kingdom
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/brunogirin/1403683194/">Alexander von Humbolt</a>