CliveW
Tour Winner
stones in bunkers are moveable obstructions
the club used to measure relief is to be the club used for the shot
The club used to determine the nearest point of relief should be the club you would expect to use if the ball wasn't in a hazard etc. However you can then use any club to measure where to drop within one club length of the nearest point of relief.
http://www.youtube.com/watch?v=tKS-d5Jl7vo&feature=related