Mod to make boat more vulnerable?

[Stoli151]

Is there a mod that makes the boat more vulnerable on the surface? For those of you that are familiar with SH4, something along the lines of real fleet boat's sub damage model where any direct hit from a gun 3" or larger is catastrophic. While playing with that mod if i am discovered while conducting a night surface attack i find myself literally holding my breath as i order a crash dive while shells fall around my boat knowing a direct hit will end my career. I was even sunk once by a lucky shot from a large tanker's deck gun while I tried to finish him of on the surface with my gun. Realistic repair times mod somewhat does what i want but i find i can still take many direct hits and still get away although it takes longer to repair damage. In real fleet boat I don't dare duke it out on the surface with a patrol craft or aircraft, as it should be. Also if there is not a mod like this can anybody with modding experience clue me in to how i may tweak the files myself? Any ideas? I know I could pretend and make my own rules on attacking on the surface but this is not quite as fun.