[VaSteve]

Quote de stuartj

4000+ meters.

So twice this depth would be very challenging for an aluminum tube....



"The pressure increases about one atmosphere for every 10 meters of water depth. At a depth of 5,000 meters the pressure will be approximately 500 atmospheres or 500 times greater than the pressure at sea level. That's a lot of pressure."

Sea plane or any tube (sub) going to that depth would just squash up like a tin can? When a ship sinks, does the ocean at that depth just crush what's left into oblivion?