Sunday was the second day of the 4th annual Brews on the Bay, sponsored by the San Francisco Brewers Guild. Each year it’s been held on the SS Jeremiah O’Brien, a World War II era Liberty Ship docked at Pier 45 at Fisherman’s Wharf.

The S.S. Jeremiah O’Brien, with Alcatraz in the background.

21st Amendment owner/brewer Shaun O’Sullivan with Marty, one of the Jeremiah O’Brien volunteers.

For more photos from this year’s Brews on the Bay, visit the photo gallery.