(untested) I still thinking keeping a water born drag chute (typically used by fisherman and sometimes called a drift sock) on the boat is a good idea to clip on the forestay bridle and toss into the water to slow/stop the progress of the boat while capsized (and help keep it head to wind). It could have made the difference and allowed the crew to swim back to the boat and lead to a calm righting process (and given time to flip the tiller bar back over the rudders ... that sucks when that happens).
when i capsize, i usually pull out the righting bag (unless someone jumps in to help me). After i right the boat.. .the bag drags under the boat until i am aboard and pull it up. It defiantly slows the boat down (as evident by the amount of force needed to pull it up and aboard)..
