This 1942  film depicts an American aircraft accurately bombing a U-boat off the Atlantic Coast. In reality, US anti-submarine tactics at this point in the war were dismal. Hundreds of merchant ships were sunk by an extremely effective U-Boat fleet in in the Battle of the Atlantic during the first half of 1942 before appropriate state-of-the-art US equipment was available and techniques such as depth charging (not bombing as shown in the film), convoy escorts, coordinated and sustained air and sea search and destroy operations were implemented.