Parachutes are not enough for saving airmen forced down at sea. For such emergencies flyers of the British Royal Air Force wear a life jacket, including trousers and coat, capable of keeping a man up- right in the water while he makes buoyant a small rubber boat by inflating it from a compressed-air bottle. The boat is carried in a flat container attached to his life jacket. When the dinghy is ready he clambers into it and paddles toward safety.