I have read stories of people and airplanes off carriers being suck under the ship.
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“He added that he then used his ejector seat, and good luck meant that he ended up above the ship. “A second later I could see the flight deck of the ship starting to appear beneath me,” he said.
Hux added that he was able to land back on the deck, just a few feet away from the edge. If he had landed in the water he could have been pulled underneath the 65,000-ton warship, the BBC reported.
https://www.businessinsider.com/f35-fighter-pilot-describes-ejecting-before-jet-fell-sea-2023-2
Google: person sucked under boat hits propeller
too many gory stories.
That’s somewhat different in that an Aircraft Carrier is going at a fairly high rate of speed, in order to launch or recover aircraft.
I’ll be honest enough to admit that I’m not sure, and that I was told during boot camp that if we were to fall overboard our first priority should be to swim away from the ship.
However, I’ve thrown tons of items overboard during my times at sea, and I’ve never seen anything disappear under the ship as it approached the screws.