From our English friends in 1952, we have these amazing buoyancy accelerator inventions. Here is the movie clip with inflatables and motorized UNSINKABLE SWIMSUITS.
Also, Here is Ruth Elder in her “Unsinkable Swimsuit” test before her airplane voyage across the Atlantic in 1927. She was the first female pilot to [almost] cross the Atlantic. Her plane stopped 300 miles short, but who’s counting? She still got the heroes welcome in New York with ticker tape streaming from the high rises AND she got to wear this swimsuit when she landed in the ocean.