Jams, without the intelligence you don’t know what’s important and what isn’t and there’s an awful lot of ocean to search if you’re looking for subs. Colossus and radar were crucial to saving the British Isles from invasion, just as the RAF and Royal Navy took the battle to the enemy.
]]>There’s also a Dutch woman who builds, among many other marvelous devices, modern versions of old crypto equipment. I’ll post her name when I find it.
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