re: Titanic tourist submarine goes missing

Probably crushed like a tin can

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The pressure at a depth of 2.5 miles is about 400 atmospheres, 400 times the pressure on the surface and equivalent to half a tonne per square centimeter.

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What would the human body look like being exposed to that? Squished to tiny blob and consolidated matter? That is insane pressure.

Just tying to equalize my ears at 90 feet is enough pressure for me. I can’t imagine being down there with that pressure, I’m sure I wouldn’t have to imagine long though.

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When people write that they hope for a rescue, are they thinking or just sputtering?

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I suppose its possible that they just lost power and are sitting there on the bottom waiting on a rescue. I read that the sub has enough oxygen and supplies for 96 hours of survivability.

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fricked around with mother nature and found out.

Dumb fricks.

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I feel about as sorry for these dumb asses as I do for the dumb asses who try and climb Everest.

Do dangerous shite so don't be surprised when it turns out bad.

Most positive situation would be loss of communication and the submersible has surfaced and is adrift far from the ship. A very bad but survivable situation is loss of coms on bottom and unable to ascend. There might be a few days of emergency air.

If rescue had been prearranged it would just be a matter of waiting for the calvary to arrive. Put a line on the stricken sub and hoist it. If not prearranged another sub or ROV and a ship with all the needed capabilities must be found that can reach the location during acceptable weather before the air is gone. Hypothermia is a possible factor; it's cold down there.

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I feel about as sorry for these dumb asses as I do for the dumb asses who try and climb Everest.

Do dangerous shite so don't be surprised when it turns out bad.

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Like Green Boots?

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Multi day trips to the wreck cost tens of thousands of dollars and one dive to Titanic, including both the descent and the ascent, reportedly takes around eight hours.

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I don't understand the appeal here.

I’ve got a sinking feeling that they are in the wreckage.

Not much technical data on their web site. The CBS news video posted earlier mentioned the owner (?) stating the sub was not certified by any regulatory agency such as ABS, Lloyds or DNV.

The sub was reportedly navigated to location from the surface ship using USBL acoustics, aided perhaps by Inertial Nav on the sub itself. The brief footage of this indicated a Sonardyne USBL system in use. For professionals a relatively easy navigation task using an excellent system they have onboard the sub and support vessel.

The Titanic site is very quiet acoustically, about 45 db background acoustic noise. USBL acoustic tracking would be robust and trivial. For comparison, the Gulf of Mexico “averages” 70 to 80 db, logarithmic, mainly from all the O&G and concentrated ship activity. Halfway to Mexico from say Venice it becomes quieter.

If they’ve lost USBL tracking and voice and text comms, my guess is they’ve lost the sub. There’s no rescue assets nearby I’m aware of that could arrive within the 96 hour life support window, if stranded on bottom.