Ah, something I DO have a little info about.....
\"Kurier\" was a high-speed transmission system. Nothing new or exotic, really, I think every nation had something like it. I know the US did.
Simply, the transmitting station would punch a tape with Morse (the tape punch incremented with each character, so sending speed during punching was a moot point) then said tape would be run through a mechanical keyer at speeds in excess of 100-200 words per minute. On the receiving end, a tape printer was hooked to the output of the receiver. This tape would come spitting out of the machine with the 200 WPM Morse printed on it, which would then be read (at a much slower speed) by the Op, who would transcibe it in plain-language (or cipher). This was known as \"reading slip\" and a good reader could read it at 50+ WPM.

There was a small version of the system that the OSS (and later, the CIA) had built for their little \"suitcase radios\". The idea being that the faster your agent (or U-Boat) could transmit it\'s traffic, the less time the \"Gentlemen from the Other Firm\" had to DF or Huff-Duff the transmission...The same principle is used today, although with computer programs instead of machines by Ham Radio operators for meteor scatter mode. It\'s now called HSCW, or High-Speed CW.

73,
John WB9OFG