Having played for quite a while at about 84 percent, I stepped things up to 100 percent realism and realise what I was missing, with automated targetting and the like. It is a LOT scarier now, and I spend much more time on deck (if that's the expression). I don't launch torpedoes from 12Km - in fact I'm desperate to get really close as I'm now terrible at targetting (well, hitting, anyway).
I thoroughly recommend it, if you haven't tried it.
