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RE: [PSUBS-MAILIST] Escape from sub





Hi Dean,  I find it to be a tug a war with militaries historically. There are many amazing stories of respect and honor. Those are even more gleaming when compared to the dark side of history.   
 
Simon Lake very early on had a much better design then having to use a wet exit, and it wasn't implemented for one reason or another. Captain Kittredge and partner had a great patent and gave it to the US Navy and it was not used, when other Navies later did use it.  It appears to be more to do with politics and/or those in charge not knowing what they were looking at. I've heard a number of stories of Captains, Generals, and others in a position to know, not understanding why there clear request for known upgrades, being denied or ignored.
 
It shouldn't always be that one needs to be all for, or all against some thing. Again this is a matter of not throwing the baby out with the bath water. Just because there are some people that have other priorities in a given military then to truly respect the troops down to the last person, and you call them on it, doesn't mean your against the whole works.
 
Phil Nuytten has been working for a long time on 1 atm escape means for the whole crew.
 
"Following the specific work on the Remora (or more properly, the ‘Articulating Pressure Conduit’), Nuytten spent considerable time reviewing the history of submarine sinkings, crew rescue, crew escape, current worldwide assistance capabilities, and depth capabilities. The conclusion reached was that the Remora/Deep Submergence Rescue Vehicle (DSRV) style of outside intervention and rescue was not optimal, and the self-rescue was the only reasonable approach, for a number of reasons. After in-house study, Nuytco Research entered into a formal contract with Canada's Department of National Defense (DND) and the Defense and Civil Institute of Environmental Medicine (DCIEM) for the purpose of determining the feasibility of a one-atmosphere self-rescue system.
 
This system in known as the ‘Personnel Pressure Suite’ (PPS) and comprises an escape suit that can be tolerate to full outside pressure to the collapse depth of the submarine, as well as full internal pressure in the even that unit must be used to escape from an already-pressurized, disabled submarine (DISSUB). The study was successfully completed in 2000. Subsequently, an external/internal pressure joint was developed as well as an ultra light weight, small volume PPS hull. The Exosuit torso was used for preliminary evaluation, but the final individual package could be as small as a sixteen by twenty-four inch cylinder.
 
Nuytco has made several presentations on this proposed system to NATO submarine work groups on submarine escape/rescue with good reception. The concept is an order of magnitude less expensive than intervention-style rescue systems and would give small submarine groups the same rescue capabilities as the larger military powers. There is no situation where the availability of an individual self-rescue system would preclude outside rescue or intervention if circumstances favour that method and the physical assets are available. The capital costs of equipping a 50 man crew with PPS systems is far less than even the proportioned cost of maintaining a DSRV or Remora-style capability. Virtually all DISSUBs begin to take on internal pressure as a consequence of being disabled. As a result, crew are, almost always, at risk of some degree of tissue saturation."
 
 
http://www.nuytco.com/research/rescue.shtml 
 

 
 Regards,
Szybowski



 

From: Recon1st@aol.com
Date: Wed, 5 Aug 2009 22:03:13 -0400
Subject: Re: [PSUBS-MAILIST] Escape from sub
To: personal_submersibles@psubs.org

Brent I am an old Recon Marine and it is not true that our military does the minimum. On the
contrary. Have you ever heard of the Navy dive tables and such. It take many dollars to train
a special forces person, and for no other reason, you could imagine, it would be very
stupid to lose your investment. I have been there, and survival of the individual is at the
top of the list of priorities. These people do a very dangerous job, with no rewards you
would understand. Many are lost but not to negligence from the military.
 
And as far as escape pods, do you have any idea of the number of people on a military
sub. Even my simple math abilities can understand how ridicules that statement is.
 
Dean Ackman
USMC
 
In a message dated 8/5/2009 8:09:04 P.M. Central Daylight Time, brenthartwig@hotmail.com writes:


Jay,  Dually noted.  I'm not privy to what conditions he was under for all his blow downs. Seals many times have classified ops they don't get to tell us about. I've always found the escape means for military subs to be horrible, when they could have proper 1 atm escape pods or subs as part of the ship, with enough space to handle all the crew.  But militaries are very well known for just doing the minimum for what it takes to kill there foe, unless forced to change inch by bloody inch. 
 
Most are subs are one or two person subs, so in many instances we should have enough time to blow down in a controlled manor. Why blow your ear drums if you don't have to.


Szybowski



 

From: bottomgun@mindspring.com
To: personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] Escape from sub
Date: Wed, 5 Aug 2009 16:32:44 -0400

Brent,

He was operating under conditions that were not an emergency in nature so the blow down could be controlled.  One of the reasons for a fast blow down is that they have to get up to 120 (or more now) crew members off of the stricken sub at a rate or two or three at a time.  If they could get 3 out each time, that would be 40 total escape cycles at lets optimistically say 10 minutes per cycle to enter, close up and check seal, press down, escape out the inclined escape tube from the trunk, remotely close the outer hatch from inside the sub, drain down the trunk, and prepare for another escape cycle.  So we are looking at least 400 minutes…close to 7 hours if everything went perfectly.  In reality this doesn’t happen and bodies have had to be removed from the trunk during most other real emergencies.

 

As the Navy’s escape paper noted, people experience more difficulties with a “press down” that involves an air bubble vice a completely flooded chamber.  I would support this based upon my observations during numerous chamber runs with inexperienced personnel.

R/Jay

 

 

Resepectfully,

Jay K. Jeffries

Andros Is., Bahamas

 

Save the whales, collect the whole set.

 

 

 

From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of Brent Hartwig
Sent: Wednesday, August 05, 2009 4:03 PM
To: PSUBSorg
Subject: RE: [PSUBS-MAILIST] Escape from sub

 



Hi Jay,   It's interesting you mentioning the HO-HO-HO technique.  Just two days ago I was over on the far west side of Lake Pend Orielle in Idaho just off shore of the deepest part of the lake where the US Navy plays all the way down to the bottom at 1,150 feet. I was picking up a 16 foot Hobie Cat from a friend that wants me to do my subs first test dives off in front of his dock. He has a retired US Navy Seal neighbor that came over to talk to me about diving my sub, and being my first test dives safety diver. He was telling me about how they would routinely blow and go from 150 feet and yell GO-YO-HO or some thing like that as they ascended. I'll be speaking with him again soon, and will write it down this time. But the effect is the same in any case.

He said they would be in control of the blow down speed, so they could better clear there ears as they went down, and if they went to fast, they would stop and go back until they could clear, then continue on with the mission.  He said they didn't usually have any issues with blowing there air drums. He did damage one ear on a dive that they pushed him to far on, and ever after that, he would have to have the dive tech pierce that one ear drum with a needle before some ops, so he could clear. He wasn't very happy with the US Navies disregard at the time for there long term well being.

Regards,

Szybowski




 

 

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