Virtually a roll of honor of the Royal Navy, and the tasks the men and ships undergo, in an unaffected recital of stirring action, sometimes leavened by comic relief. Here is the toil of war, the hazardous ordeals of courage and endurance, the significant lessons of modern warfare. The Bismarck, the Illustrious, U-boats and their pursuit, fleet sweepers, patrol ships, British submarines, the Merchant Navy, Dunkirk, escapes from France and Norway, castaways and rescues, convoy action -- a panorama of the various area of the service in war at sea.