Quote:
Originally Posted by ABBAFAN
I was wondering, why is it that submersibles must descend and rose so slowly? I assume they don’t want to hit the bottom too rapidly and of course shooting up to the surface too fast would present problems but I wondered if there are specific reasons. If a submersible has to make an emergency ascent, how fast could this be done?
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I believe the one that recently imploded had a mechanism which would allow the operator to release its ballast. That would cause it to make an uncontrolled ascent.