I hesitate to blame it on lack of credentials. Much of engineering history has been made on piles if dead bodies resulting from mistakes made by fully credenti

I hesitate to blame it on lack of credentials. Much of engineering history has been made on piles if dead bodies resulting from mistakes made by fully credentialed engineers, even with advanced degrees. Engineering school does not confer at least two things: common sense and experience. These qualities are independent from academic learning. If the designer/modifier is found to be at fault it is far more likely to be due to a lack of research and common sense than a lack of schooling. I mean, building a boat like that that can sink if swamped and traps passengers inside is just plain stupid, degree or not.