I think the ideas you have about an inflatable
bladder are good ones but ultimately the solution will be dictated by money
. Also, the frequency a catamaran
capsizes is very low with respect to the number of cats on the water
and time under sail.
Best and first option is to avoid bad weather
whenever possible. Second course of action would be to reef appropriately as dictated by wind
, wave conditions and the design of the boat. Third would be to deploy a sea anchor/chute to stabilize the boat in relation to high seas.
Many factors need to be resolved if you were to make a self-righting inflation device at the tip or the length of a mast. First is weight and size; would the pre-deployed package be very heavy or interfere with sails
or sail handling? At what point would it deploy? What is the stress on the mast while the cat is in the half-righted position? How about those stresses in high seas? There's probably a whole lot more I haven't thought about here.
Cats typically float (a discussion in other places in this forum) which make them very survivable in the event of capsizing. If they can be righted then they can be repaired and reused.
BTW, this will probably turn into a love cats/hate cats discussion so be forewarned.