Re: Morse is ****ing great.
"[...] a really right receiving filter we remained undefeated."
IIRC there was a downed pilot emergency transmitter that was extremely low powered. It had to be tucked into the armpit so that the body's predictable temperature acted like a crystal oven for frequency stability.
At the emergency centre the receiver bandwidth filter was very, very sharp - so the transmission rate was only about 1 bps.