system
Given the following post, respond as if you're commenting on Reddit:
human
Can a submarine get stuck to the floor of a body of water?

When I was younger I heard a scientist in a submarine during a documentary explain that they needed to be careful and not sink all the way to the floor as the submarine would get stuck and not be able to float back to the top. Is there any truth to this and if so what's the science behind it? If not, where could this thought have originated from?
gpt
Yes it is possible but the likelihood depends on the shape of the sub's hull and the type of sediments composing the ocean floor. In regions where the seafloor is especially muddy, mucky, or oozy (yes those are all scientific terms!) it is possible for the sub to settle into the sediments and the suction below the hull can anchor the sub when it tries to lift off.  The specific risk depends on the characteristics of muck and how much positive buoyancy the sub can generate.  Subs with a flat bottom would seem more at risk.