If you read the history of the united states navy in WW2, there are plainly many examples of ships having sprung plates, flooding damage, etc. from near misses with bombs. In the early war years, many of the US Destroyers were old WWI 4-pipers and a near miss could spring enough plates to make the flooding a significant problem, but on the later destroyers this wasn't much of a problem unless the ship had sustained a lot of other damage. Since AH2 does not simulate flooding damage (as is plain since you can hit a CV with a torpedo and it just keeps right on going at full speed) - simulating sprung plates and flooding damage on small combatants doesn't seem like it should be much of a priority.