I always thought an inflatable anti-capsize device on the mast would be a good safety feature to prevent larger multis from going full turtle.

You could have an auto-inflater switch at the deck tied to a scuba tank that would inflate an airbag type setup at the masthead. A 15# lift bag would be all it takes for something up to 30 feet.

Once the boat's back up, you could probably even devise a small vacuum pump (manual or battery) to deflate the bag. Or, to keep it simple, have it attached to a halyard or something so you can lower it once you're done.