The main oddity of the film is how it portrayed the U-boats as having some personnel vendetta against Greyhound to the extent that they all ultimately revealed their own positions, in trying to sink Greyhound, where realistically they would have used their inherent stealth to avoid the escorts and sneak into the convoy. At this point in the war, escorts by and large still had an extremely hard time even 'generalizing' the location of submerged U-boats.
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