It is not at all likely. Ships are built to be virtually indestructible. Additionally, communication systems are state-of-the-art, which allow alerts to be broadcast for an immediate response. Security on the ships is top-notch. The seas where cruise ships travel are highly patrolled both on and below the surface. In some parts of the world, piracy and terror attacks might be a greater concern, and cruises would not be scheduled in areas that pose such threats. The safety record of cruise ship companies with regard to the integrity of the vessel is unparalleled. Feel free to ask your travel agent or cruise line representative for information regarding the safety features of the boat.