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Dan , you are probably right on this. Right for the non asthma-, non smoker community. However, there are a lot of people out there with hidden, unknown weaknesses in their lung tissues, which would be prone to rupture if provoked by, for instance a rocket ascent. My source for this is Dr. Kay Tetzlaff, former Dr. in Kiel at the German navy's medical Institute. regards Matthias Dan Volker schrieb: > > ----- Original Message ----- > From: <Scaleworks@ao*.co*> > To: <jdm49@ca*.ac*.uk*>; <mmowens@pa*.co*> > Cc: <quest@gu*.co*>; <techdiver@aquanaut.com> > Sent: Thursday, June 07, 2001 3:40 PM > Subject: Re: here we go again was - NY DCS hit > > > What ever happened to being responsible for you own actions? Everyone > from > > the buddy to the captain and crew are being blamed here. What > responsibility > > does the diver who suffered the incident hold? > > > > The incident also begs the following questions. > > Should a diver that rockets to the surface be followed by his buddy? If so > at > > what ascent rate? If you ascend at a rate to preclude embolism, your buddy > > will be on the surface for a minute or two before you arrive. > > Kevin, that's BS. Unless you have asthma, you can ascend pretty much as fast > as you want to by exhaling hard. Back in the 70's I used to practice free > ascents from 90 to 130 feet--just so that if it ever came up, I could do it > easily. While we know "now" that this is NOT a smart practice, I can tell > you I could chase anyone up to the surface without worrying about an > embolism. And I would be headed right back down with them unless they were > blacking out or worse--in which case I would stay with them until the boat > got someone in the water to take over--then I'd do a rapid descent. > > A buddy should and could have tried to prevent this ascent accident. > > If their are > > 2-3 ft seas upon surfacing, with a current, will you be able to see your > > buddy from your perspective, or even reach him in the current? > > The buddy should be reacting long before this guy is out of sight---he > should have been watching when the problem occured if there was a gas switch > going on. Even if he missed the start of this problem, if he saw the guy > ascending at flank speed, he could have followed to attempt some life > saving. That's his job. > > If you are > > experiencing DCS symptons upon surfacing, what good are you to your buddy? > > As an air diver, you should have 2 or three minutes on the surface prior to > hypersaturation releasing enough bubbles to be much of an issue to you--more > than enough time to render immediate aid and get others to help--then to > head back down to do deco. > > > The crew on the Wahoo is on constant watch when divers are in the water, > and > > have the proper perspective to see a surfacing diver in trouble. The diver > > would have been rescued and evaluated, and a tender dressed to take him > back > > down if possible before you even surfaced. This tender will have a fresh > set > > of back gas, and appropriate amounts and mixes of deco gas. He will be > fresh, > > with no deco obligation or DCS symptons, or possibility of neurological > > complications that could kill both divers if they went back down. Now you > > surface, your gas supply is limited, you are possibly suffering DCS > symptons, > > or will be soon, since you did not come up the anchor line, you are > floating > > downstream in the offshore current, and need to be rescued yourself, you > have > > exacerbated and compounded the problems, and distracted the crew from the > > business at hand. > > First I'll FAULT the boat for anchoring in a big current on a tech dive, > with no chase boat to help in a scenario like this. Forcing divers to use an > upline instead of helping a buddy is sheer stupidity in my book. It seems to > be economics and ego over common sense. > We have much larger currents on our deep wreck dives than you guys ever > will, and have no issues like you have. But the boats we use will not drop > 30 divers into a free for all--they drop groups that will ascend together as > a team, and a problem to one is dealt with by all---in the drift ascent. > > Who is best prepared and capable of handling the situation? > > What services are you as a buddy going to be able to provide to the diver > in > > distress? Should the diver go back down while suffering advanced type I > > symptons on surfacing, and risk having type II symptons develop upon > > recompression becoming paralyzed, going into shock, or having convulsions? > > Considering the drastically increased damage every additional minute will > cause, I would not consider waiting 2 to 5hours or more to get to a > chamber--to me, that is begging for life in a wheel chair or worse. > > Regards, > Dan Volker > > -- > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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