On Mon, 21 Dec 2015 18:51:29 -0700, Tony Hwang
wrote:

M. Stradbury wrote:
Is it true (or an urban myth) that a swimmer would be sucked
under (presumably to drown) when a capital ship sinks?

Like toilet bowl water swirls.

I don't think the swirl is the part that matters. If you pour a
half-bucket of water in a toilet, it will drain without swirling. It's
the draining and emptying that matters.