I'm curious about that, too. My dad did 2 tours on aircraft carriers during the Viet Nam War. He told me they were trained to get a certain distance out if forced to abandon ship to avoid being sucked under when it sank. But I don't know if that was based on any sound science, either. Although of course the USN has plenty of wartime experience with ships being sunk.
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“I'd rather have questions that cannot be answered than answers that can't be questioned.” —Richard Feynman