matt_unique:3-4 is definitely common for that wreck. A low transom combined with a heavy load could definitely cause the waves to spill over. If his scuppers were plugged and or if the bildge was not working that is definitely a recipe for trouble. The current would typically have to be smokin' to counteract the force of the wind turning the bow into the seas. Crazy stuff definitely happens on the ocean.
--Matt
Yeah, I agree it was very unusual for the stern to turn into the waves like that. And you are right I suspect there probably was some contributing factor I am unaware of like a problem with the bilge pump or scuppers causing some of the spray from earlier to build up in the bilge.