My Bavaria 32 Cruiser has just come out of the water 9 months after launch, and there was no sign of an anode, on the hull, just a shaft which should have had an anode attached. Either no anode was fitted in error, it's dropped off during the season, or it's eroded away. Boat yard have fitted a largish doughnut shaped anode which is mounted on a stainless steel plate backed up with a stainless steel penny washer.
Obviously my Bavaria should have had an anode, but I did notice a 39 in the boat yard which had no anode at all and seemingly no where to mount one.