What a 10-20 g pulse would do to a warship

What would a 10-20 g gravitational pulse do to a 20,000-ton ship at sea?

It would be catastrophic and would likely tear the ship apart.

A 10-20 g pulse is expected to crumple a 20,000-ton ship and tear parts of it apart. The explanation turns on forces pulling at the structure in ways it was not designed to withstand. Ships are described as resisting pressure, while a violent pull would impose a different problem.