Cat 38 Scuppers
I have yet to experience backflow from the cockpit drains (scuppers) into the cockpit from followings seas,but on some heel angles I used to receive some degree of flow.Last year when I was doing a major overhaul of the steering system, I crossed the cockpit drain lines, port drain to starboard thru hull, etc, and this eliminates most of the problem. This may help the follow seas situation.