Deep thoughts and some questions

Cope said

The other day i was watching some documentary on something or other about deep ocean stuff. They show the obligatory shot of the ROV touch down and silt plumes up around the machine.


We've all seen it.


So pressure vs density?

Here is an excerpt from the wiki page on the Marinas trench.

At the bottom of the trench, the water column above exerts a pressure of 1,086 bars (15,750 psi), more than 1,071 times the standard atmospheric pressure at sea level. At this pressure, the density of water is increased by 4.96%.

[FONT=-apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Lato, Helvetica, Arial, sans-serif]Those of us that have hydro locked an engine know water dosnt really compress much.
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[FONT=-apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Lato, Helvetica, Arial, sans-serif]My question is this.

Shouldn't that silt have almost 16,000 pounds holding it down? Id think the ocean floor would be like a steel plate and everything smashed flat?

I know the pressure surrounds objects evenly and thats why we use spheres to get there but at some point there is no more "underneath" and the weight (pressure) should be pushing down?


Right now im watching a doc titled, "The Deadly Treasure of Lake Kivu."
It talks about this deep lake in africa that is holding ton and tons of methane under its water due to water density.


For some reason I can not wrap my brain around this.


Do ROVs use more power to cover a given distance at great depth due to water density?

Much like an aircraft burns more fuel the higher it flys due to reduced air density / lift.


Any one here a deep water scientist type?


Or just can explain in simple terms what I am not taking into account?


Thank you, next window please.





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The pressure isn’t only holding it down, it is pressurizing the substrate in every direction at once. It still behaves with the same laws of physics, only slower.

What I don’t get is my dumbass watching a documentary on NR1, a submarine built without Congress’s permission by Admiral Rickover, a submarine that has two front wheels on the bottom to drive on the ocean floor-was taught to me to be classified and the documentary is explaining a ‘Dukes of Hazard’ story and scenario where that boat went off of a deep cliff and CRASHED into a much deeper part of the ocean-& I can’t figure out how they lived.

Thatkind of pressure makes space exploration efforts appear to be child’s play. All the evil is trying to get into you at thousands of pounds per square inch, versus keeping air in and a little zoomy radiation from the belts.