Why?,

Stand on the aft corner that is the most downwind, and the mast should come up to windward. A boat that is turtled can usually be righted again, unless the mast is stuck in the mud. I've had to remove my PFD, and swim down a mast, and pull it out of a muddy bottom putting my feet agianst that same muddy bottom for leverage! Kinda scary. However, a mast float will prevent this kinda thing, check out those guys at Delray Beach, with all the mast floats, milk jugs, etc.