Instinctive behavior occurs when an animal has a particular internal state while it is in the presence of a specific external stimulation called a releaser or a sign stimulus.
How many ships did the U-boats sink? During the war the U-boats sank about 2,779 ships for a total of 14.1 million tons GRT. This figure is roughly 70% of all allied shipping losses in all theatres of the war and to all hostile action. The most successful year was 1942 when over 6 million tons of shipping were sunk in the Atlantic.
While it isn't something that happens often, cruise ships can and do sink. Just ask the passengers aboard the Sea Diamond. That cruise ship sank off the coast of Greece in 2007.It took more than three hours to evacuate 1,600 passengers and crew members, but two were never found and presumed dead. The Web site cruisejunkie.com lists 19 cruise ships that have sunk since 1980.hile it isn't something that happens often, cruise ships can and do sink. Just ask the passengers aboard the Sea Diamond. That cruise ship sank off the coast of Greece in 2007.