I'm not reinventing the wheel here, or suggesting anything new - just that focusing on improving these would be a better investment of resources than creating a

I'm not reinventing the wheel here, or suggesting anything new - just that focusing on improving these would be a better investment of resources than creating an unsinkable ship. For example: * How good are the systems that realise that ships need righting and transfer the ballast automatically before it overturns? * Refloating may not be feasible once the ship is overturned, but by then it'll be too late. How about self-inflating bags that inflate as the ship starts to sink, buying valuable time for people to escape? * Automatic navigation is one thing, but how can we improve it? Does it identify foreign objects above/below the waterline? Does it have stabilisation assistance? Does it pump ballast around to ensure the best possible handling under any condition? Just because these things already exist doesn't mean they can't be improved. In some cases this could potentially be done relatively cheaply.