Room 39

You never move a ship. You are the duty analyst in the Admiralty's Operational Intelligence Centre, and every day the war arrives as paper: decrypts, sighting reports, agents of uncertain loyalty. You decide what is true, say how sure you are, and send it upstairs to people who will act on your word — exactly as far as they have learned to trust it. TWO HISTORICAL CAMPAIGNS THE ATLANTIC, MAY 1941: is BISMARCK preparing, when does she sail, which passage does she take. THE ARCTIC, JULY 1942: TIRPITZ, convoy PQ17, and the scatter order — the worst intelligence decision of the naval war, yours to make better or repeat. CONFIDENCE IS THE GAME Western Approaches routes tonight's convoy on your call. Home Fleet raises steam or doesn't. Downing Street will ask you two hard questions and remember the answers. Confidently wrong burns your standing; even odds keeps it but earns nothing, and…