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.
All but one of the carrier sinkings occured during World War II. The last U.S. carrier that was sunk was the USS CARD in May of 1964 and the carrier was refloated. Service aboard an aircraft carrier is dangerous.HE LOST AMERICAN AIRCRAFT CARRIERS The tragic, terrible aircraft carrier fires of the USS ORISKANY, the USS FORRESTAL and the USS ENTERPRISE are but small reminders of the fact that the U.S. Navy has suffered much worse aircraft carrier losses in it's history.