On Tue, 22 Dec 2015 14:51:47 +1100, Sylvia Else wrote:

Mythbusters tried it, and concluded that there was no significant
sucking sown.

https://www.youtube.com/watch?v=rvU_dkKdZ0U

Sylvia.

Nice find!

Will a Sinking Ship Suck You Down with It? | MythBusters
https://www.youtube.com/watch?v=rvU_dkKdZ0U

Theory 1:
Air mixes with water makes the water less dense, hence
sucking you down.
Theory 2:
Cavities in ship causes water to rush into the ship, hence
sucking you down.
Theory 3:
Ship falling down creates a vortex above it, hence
sucking you down.