Apparently they implemented 'seven safety systems to help it return to the surface', but whether those actually worked is questionable. It doesn't exactly insp

Apparently they implemented 'seven safety systems to help it return to the surface', but whether those actually worked is questionable. It doesn't exactly inspire hope to read that one of these 'systems' was to have the passengers 'tilt the sub by moving to each side of it releasing weights held in place on each side'. https://www.bbc.com/news/world-us-canada-65965665 https://www.bbc.com/news/world-us-canada-65965665