One of the most interest facts about this disaster is that if the submarine was standing on its tail straight up, its nose would be sticking 150ft OUT of the water it sunk in.
It only takes a little over a minute to walk 100m. And if I stand at point A and look at point B, 100m away, it doesn’t feel far away either.
That’s why I think even though I am only able to swim what 4 meters or something down, maybe less, 100m under the water sounds really little for a submarine. Also probably because I have no experience with submarines so I was imagining that for the most part they would be many hundred meters under the sea level.
Similarly, a human can drown in only a few inches of water, not even enough to fully submerge you while lying face first in it, let alone while standing.