Originally Posted by LowPost42

Just quickly - although the ball may not be OB, it may be unplayable.

An unplayable ball is judged solely by the player. Under the penalty of 1 stroke, he may:

a) Drop a ball within 2 clublengths, no nearer the hole.
b) Drop the ball on a line between the current ball location and the pin, as far back as he wants, no nearer the hole.
c) Replay the shot from as close to the original location as possible.

Please note, that if the player is in a hazard and elects option a or b, he must keep his ball in the hazard.