#Submarine movie greyhound code
Long range transmissions were done in Morse code to keep the radios as simple as possible and to maximize their effective transmission range a series of beeps is much easier to understand than voice. U-Boats were cramped and had limited power. Radios in 1942 were large, power hungry, and expensive.
While I don't have a strong knowledge of U-Boat radios, a radio capable of transmitting voice would seem to be an unnecessary luxury on a Type VII U-Boat. In reality, the U-Boat captain would have severely disciplined that rating for mucking about with very sensitive and expensive equipment, and for alerting the convoy they're listening on their frequency. He has an English-speaking rating who chips in with rude remarks, and I wouldn’t like him to hear this. Jerry’s been on this circuit more than once during the night. There is one line in the book where a British officer tells Krause he won’t send an important message over voice radio because. Greyhound is based on the book The Good Shepard. However, Greyhoud depicts an attack on an escorted convoy. However, this would be done by simply holding down the telegraph key on a Morse code transmitter to transmit a continuous tone. Many radios of the era could only transmit on fixed frequencies.
What might have a kernel of truth is jamming a radio frequency to prevent a lone merchant vessel from calling for help. It comes across as jingoistic do we really need to make things up to convince the audience the Germans are the bad guys? This unfortunate, unprofessional fiction cheapens an otherwise tense and well made movie it's something I'd expect of the dreadful U-571. I cannot recall any incident of naval adversaries taunting each other verbally in the middle of a battle, nor would an officer expect their counterparts to be affected by such taunts. While such unprofessional and amateurish behavior might be a bit more realistic late in the war after U-Boats had been decimated and crews were inexperienced, Greyhound takes place in Feburary 1942 when the U-Boat arm was at a peak during their Second Happy Time. The attack at 1:09:00 is particularly suicidal it depicts the U-Boat keeping their periscope up to drive home an attack on an escort while being fired upon. They get too close and keep their periscopes up too long. In general, the U-Boats in the movie take too many unnecessary risks. Similarly, the large, bright red and white insignia on the conning towers would make the U-Boat more visible when on the surface. Finally, it's a distraction at a time when the entire U-Boat crew should be focused on the complexities of an attack. and no U-Boat captain in their right mind would risk detection just to make taunts. The Germans were well aware of this and even had special shortened codes to reduce transmitting time. Transmitting allows the U-Boat to be found via radio-direction finding. The U-Boat may also have to hoist an antenna further putting the at risk and slowing their ability to dive. While the first two transmissions come at night when a U-Boat would be on the surface anyway, the third at 1:08:00 happens in the morning, only two hours away from air cover, and while on the attack simply alerting the escorts and distracting the U-Boat crew. In order to transmit, a U-Boat must be on or near the surface putting them in obvious danger to visual spotting and radar. I have never heard of such an incident and, as with the large, bright red insignia painted on the conning towers, it puts the submarine in unnecessary danger for no advantage.
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