Slower & Less damaging Lifeboats.
After sinking a Merchant which jettisoned a few lifeboats. I then watched as a Destroyer came in and hit one of the lifeboats. This was followed by the sounds you usually get if your subs being rammed.
I then continued to watch as the Destroyer caught fire and keeled over and sunk.
I decided to tone down the damage a bit and make the rafts a lot slower. Now you can actually pull along side one or ram it, depending on how you feel.
http://hosted.filefront.com/Meridian1a/