You can drop it in the bunker where the interference from the water is least. ie you don't have to take full relief.
Or with a penalty stroke, drop it outside the bunker keeping the point where the ball lay directly between the hole and the spot on which the ball is dropped, with no limit to how far behind the bunker the ball may be dropped. (25-1b(ii)(b)
You may also go back to where you last played, with a penalty (28a)
Edited: 01/06/2007 at 00:02