No Carnival ships come out or leave out of San Fransisco. They only ship that is going to come in once is the Splendor next year.
It must be the Paradise for its drydock. That's the only ship I can think of becuase the Paradise was scheduled for drydock in December.
Carnival Dream for Thanksgiving
Eastern Caribbean- 11/20/2010
Carnival Ecstasy (4 Day Baja Mexico) 2003
Carnival Pride (7 Day Mexican Riviera) 2007
Carnival Spirit (8 Day Exotic Mexican Riviera) 2007
Carnival Freedom (7 Day Western Caribbean) 2008
Carnival Elation (4 Day Baja Mexico) 2009
Carnival Spirit (7 Day Southbound Alaska) 2009