This is why I carry a plunger (like you would use on a clogged toilet) on our boat (not my idea read it in a magazine, L&A I think).
You can put the plunger on the out side of the boat to stop the water and then make an appropriate repair from the inside.
“Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover.” -Mark Twain