To prevent a ship from failing. This assignment reminded me of a documentary we rented recently called Deep Water. It was about an inexperienced yachtsman in England in the '60's who got himself into a one-man sailboat race around the world. He got funding for a boat, and staked his family's home on his success. Once the boat was built and the champagne was brought out, the bottle bounced off and had to be forcibly broken, after many tries, on the ship. I won't give away how it turns out, but it was a very good film!