Re: Old typewriter
Though if you have cracked an Enigma message regarding the assembly of a U-boat Wolfpack, you have to tell the convoys at sea to change course to avoid it (the Wolfpack) in some manner without the German's knowing or at least without the German's realising why you sent the message to change course
I seem to recall that the German's did actually break the code the British used for merchant convoys, or rather the codes - I think the British relied more on changing the code periodically to maintain security.
Biting the hand that feeds IT
