MAYBE
not lose the mast. The bottom 6 feet or so of a 35ft + column is supported between the deck and keel, so there is still a lot of lever arm above the deck. Would probably depend on which wire lets go. If a lower shroud, you might be OK, but an upper or stay? If you do lose the mast, you stand a fair chance of tearing up the deck as well, as it is pryed up and out by the leverage of the mast going overboard.