I wound not panic and do nothing. If the boat shunk, the same applys. However if I was bleeding, I would say a prayer to the Good Lord and then the sharks would have me for dinner. There is another answer I can give. There are a lot of different shark breeds, and of these only 3 types of shark are hostile to humans, so chances are the sharks would be harmless and swim away from the rowboat and I wouls surive, thanks be to God, and row ashore and book in a Escort girl to celabrate!