as seen from Jones & Green Streets on Russian Hill - San Francisco

An inbound pusher-tug with a dredge barge is making way just off of Alcatraz Island.
The ship secured off of Pier 45 in the foreground is the World War II Liberty Ship "Jeremiah O'Brien" - the only fully operational ship of its class.

More information: http://en.wikipedia.org/wiki/SS_Jeremiah_O%27Brien