Hercules (tug)Hercules (tug)

This 1907 steam tug is now a museum ship at the San Francisco Maritime National Historical Park. Official plaque located in the San Francisco Maritime National Historical Park Visitor Center, located at the corner of Hyde and Jefferson Streets. Photo: Sanfranman59, CC BY-SA 3.0, via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:Hercules_(steam_tug,_San_Francisco).JPG)