Visibility issue in Campaign

[CCesternino]

There must be something wrong with the AI survivability for a campaign 1890 TB. She flash fired 3 times and twice flooding indicator at 1% pumps still keeping her afloat the entire time. The entire enemy fleet was like that, while my own TB caught fire, flash fired than sank after 1 5in. shot. Plunging over-pens should be more critical it was a lucky 10 inch shell straight through her center that stopped the TB but didn't kill her, because yeah, my shell passed through her weak armor, straight down into her bowels and out into the water below. 

[FlyingToaster]

I just tried the 'battleship vs torpedo boats' academy mission. 
One TB had 6 flash fires before starting to sink (these were 500t TBs with about 8 3" guns and 1 torpedo mount).
Another TB took 6 9" shells and a dozen 5" shells before starting to sink.

What type of metallurgical sorcery is this?