Recent content by physicsnerd

Blimps are simply non-rigid airships, they are lighter than air. Once at sea, submarines use compressed air to adjust their ballast levels for neutral buoyancy or slightly negative buoyancy, then operate by using their diving planes to ‘fly’ through the water. Since military submarines all carry...

I recall reading an article on this many years ago (1980s?). It was published in either Scientific American or Smithsonian magazine.