Certainly ships should be harder to sink than most simulations model them, and perhaps IL-2/PF is better than most in this regard. However, IMO damage modelling is the fatal flaw in all of the Maddox (IL-2 - based) sims. In all Maddox games flak is hugely more effective than it was in real life. In fact all weapons are far too effective, but flak is ridiculously so. Also, bullet trajectory modelling is simplistic at best, which makes the damage model problems so much worse. This all leads to a simulation that is about 20 times more deadly than real life. All sims tend to exaggerate casualties to a certain extent, but the IL-2/PF series is the worst offender in terms of survivability modelling. I love the graphics, which are probably the best in the industry, but because of the awful survivability/damage modelling I find that Maddox sims are best regarded as arcade games dressed up as simulations. These games are fun to fly and nice to look at, but it's impossible to fly a realistic campaign in IL-2/PF.