The Bombe electromechanical codebreaking machines were
used by WAVES (Women Accepted for Volunteer Emergency
Service) at the U.S. Navy's Nebraska Avenue Building. The
machines ran 24 hours a day, 7 days a week.
Bombes simulated the rotor movements of the four-rotor
Enigma coding machine carried by German submarines. Allies
used the knowledge gained from Enigma to help in winning
the Battle of Atlantic which lead to the end of WWII.
Secret History of the Female Code Breakers Who Helped
Defeat the Nazis