RE: [PSUBS-MAILIST] Escape from sub

Brent,

Not everyone’s ear drums are blown but the percentage goes up the deeper you go. This is briefed as part of your training in emergency ascents plus is referenced in the paper that was cited here a few days ago (I have other technical references buried away from my when I developed the presentation on this subject). People that dive regularly usually have an easier time equalizing (but more difficulty when “pressed down” in a bubble, also referenced in the paper). You have to remember that SEALs are at the top of physical conditioning and health when diving plus have experience way beyond your typical PSUBber making an emergency ascent. You are mixing apples and oranges.

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 9:59 PM
To: PSUBSorg
Subject: RE: [PSUBS-MAILIST] Escape from sub

Jay,

I shouldn't of said blow down, since the term he used was blow and go, even though I think of it more as flood and go.

I specifically ask him if he had any trouble clearing his ears, and his buddies during pressurization, and if they had trouble getting bent for there fast ascents with an with out Steinke hoods from 150 feet and many times deeper, and he said usually no. He said they did many free ascents from 150 plus feet as part of there regular training and maintenance training with out blowing there ear drums. That and the other material I've read supports what he's saying enough for me to question your love of blowing ear drums.

If every time some one uses my sub for wet exit training, they have to blow there ear drums, it won't be a very popular ride.

Szybowski

From: bottomgun@mindspring.com
To: personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] Escape from sub
Date: Wed, 5 Aug 2009 21:22:22 -0400

Brent,

Depending upon the depth, we don’t really have the luxury of a controlled pressurization (a blow down is when they vent a chamber to flush out excess oxygen or other gas build ups). The idea is to pressurize as quickly as possible so that decompression illness (DCI) due to the time for pressurization and the rapid buoyant ascent. It would suck to make it to the surface and then be severely “bent” whether there was a surface support vessel waiting for you or not. From personal experience, DCI even if treated successfully, messes you up for quite a while. Your tempatic membranes will either heal or can be repaired.

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 9:07 PM
To: PSUBSorg
Subject: RE: [PSUBS-MAILIST] Escape from sub

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