sentences:  Hinsley realised that if the code books could be captured from one of these trawlers, the naval Enigma system could be broken, with British intelligence able to decipher messages to U-boats and discover their locations.The problem remained that if the navy were to attempt to capture one of the weatherships, the German crew would have time to throw their Enigma settings into the sea before they were boarded.Hinsley instead reasoned that the following month's Enigma settings would be locked in a safe aboard the ship and could be overlooked if the Germans were surprised and forced hastily to abandon ship.