Mailing List Archive Mailing List Archive
> This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. --MS_Mac_OE_3078393956_4277012_MIME_Part Content-type: text/plain; charset="US-ASCII" Content-transfer-encoding: 7bit Well, you have to look at the logistics of an Ocean dive and other issues. How would we carry a FFM? Do you use a gas block? What problems does introducing a gas block bring up? How about redundancy? What about sharing? On the whole a FFM in Ocean diving for deco sucks and, IMHO, introduces a whole slew of CF factors which are not warranted by the risks. Jim ------------------------------------------------------------------- Learn About Trimix at http://www.cisatlantic.com/trimix/ From: Johnscha@ag*.co* Date: Thu, 19 Jul 2001 13:00:11 -0400 To: cobber@ci*.co* Subject: RE: The Seizure Jim I agree with you, I just think there are so many variables if you have to do 02 in the open ocean you should be on a full face mask. I do 02 in a cave laying on a log at 15' totally resting for 10 min max because I'm old. Thanks John -----Original Message----- From: Jim Cobb [mailto:cobber@ci*.co*] Sent: Thursday, July 19, 2001 12:52 PM To: John Schachleiter; Tech Diver Subject: Re: The Seizure Well, why do skydivers jump out of perfectly good airplanes? A calculated risk to be sure. I have commented against 1.6 PP02 bottom mix nitrox dives for years and get my monkey slapped every time by the "experts" (otherwise known as nitrox instructors). Personally I like to keep my bottom mix as low as practicable (1.1 or so) and then do a deco on a somewhat higher mix. Many divers look at me like I am nuts for doing this, I guess because it means a few more minutes of deco. But as I've said before in technical diving the thing that scares me the most is the PPO2 and oxtox and if I feel the least bit strange, the slightest twinge, I go to the back gas. I don't care if I've been on 02 for 2 or 10 minutes. I think it is good to have a back gas break schedule of 15 or 20 minutes, but the decoing diver needs to be very conscious of his or her physical demeanour while at the high PP02's and back off quickly and without hesitation, even if it means a few more minutes of overall deco time. Jim ------------------------------------------------------------------- Learn About Trimix at http://www.cisatlantic.com/trimix/ From: Johnscha@ag*.co* Date: Thu, 19 Jul 2001 10:56:27 -0400 To: techdiver@aquanaut.com Subject: The Seizure All I am really reluctant to jump in after reading this list for over a year, but since I can't get anyone to respond directly, here goes. Why are we doing something, that has been identified over a decade ago as I'll advised i.e. breathing 100% 02 in the open ocean, and particularly not using a full face mask ? DIR or not, there are other less risky ways to deco. No flames, just respond if you are inclined. Thanks JWS --MS_Mac_OE_3078393956_4277012_MIME_Part Content-type: text/html; charset="US-ASCII" Content-transfer-encoding: quoted-printable <HTML> <HEAD> <TITLE>Re: The Seizure</TITLE> </HEAD> <BODY> Well, you have to look at the logistics of an Ocean dive and other issues. = How would we carry a FFM? Do you use a gas block? What problems does introdu= cing a gas block bring up? How about redundancy? What about sharing? On the = whole a FFM in Ocean diving for deco sucks and, IMHO, introduces a whole sle= w of CF factors which are not warranted by the risks.<BR> <BR> Jim<BR> -------------------------------------------------------------------<BR> Learn About Trimix at http://www.cisatlantic.com/trimix/<BR> <BLOCKQUOTE><BR> <B>From: </B>Johnscha@ag*.co*<BR> <B>Date: </B>Thu, 19 Jul 2001 13:00:11 -0400<BR> <B>To: </B>cobber@ci*.co*<BR> <B>Subject: </B>RE: The Seizure<BR> <BR> </BLOCKQUOTE><BR> <BLOCKQUOTE><FONT COLOR=3D"#0000FF"><FONT SIZE=3D"2"><FONT FACE=3D"Arial">Jim<BR> I agree with you, I just think there are so many variables if you have to d= o 02 in the open ocean you should be on a full face mask. I do 02 in a cave = laying on a log at 15' totally resting for 10 min max because I'm old.<BR> Thanks<BR> John<BR> </FONT></FONT></FONT> <BR> <BR> <BLOCKQUOTE><FONT SIZE=3D"2"><FONT FACE=3D"Tahoma">-----Original Message-----<B= R> <B>From:</B> Jim Cobb [mailto:cobber@ci*.co*]<BR> <B>Sent:</B> Thursday, July 19, 2001 12:52 PM<BR> <B>To:</B> John Schachleiter; Tech Diver<BR> <B>Subject:</B> Re: The Seizure<BR> <BR> </FONT></FONT></BLOCKQUOTE>Well, why do skydivers jump out of perfectly goo= d airplanes? A calculated risk to be sure.<BR> <BR> I have commented against 1.6 PP02 bottom mix nitrox dives for years and get= my monkey slapped every time by the "experts" (otherwise known as= nitrox instructors). Personally I like to keep my bottom mix as low as prac= ticable (1.1 or so) and then do a deco on a somewhat higher mix. Many divers= look at me like I am nuts for doing this, I guess because it means a few mo= re minutes of deco.<BR> <BR> But as I've said before in technical diving the thing that scares me the mo= st is the PPO2 and oxtox and if I feel the least bit strange, the slightest = twinge, I go to the back gas. I don't care if I've been on 02 for 2 or 10 mi= nutes. I think it is good to have a back gas break schedule of 15 or 20 minu= tes, but the decoing diver needs to be very conscious of his or her physical= demeanour while at the high PP02's and back off quickly and without hesitat= ion, even if it means a few more minutes of overall deco time.<BR> <BR> Jim<BR> -------------------------------------------------------------------<BR> Learn About Trimix at http://www.cisatlantic.com/trimix/<BR> <BLOCKQUOTE><BR> <B>From: </B>Johnscha@ag*.co*<BR> <B>Date: </B>Thu, 19 Jul 2001 10:56:27 -0400<BR> <B>To: </B>techdiver@aquanaut.com<BR> <B>Subject: </B>The Seizure<BR> <BR> </BLOCKQUOTE><BR> <BLOCKQUOTE><BR> <FONT SIZE=3D"2"><FONT FACE=3D"Arial">All</FONT></FONT> <BR> <FONT SIZE=3D"2"><FONT FACE=3D"Arial">I am really reluctant to jump in after re= ading this list for over a year, but since I can't get anyone to respond dir= ectly, here goes. Why are we doing something, that has been identified over = a decade ago as I'll advised i.e. breathing 100% 02 in the open ocean, and p= articularly not using a full face mask ? DIR or not, there are other less ri= sky ways to deco. No flames, just respond if you are inclined.</FONT></FONT>= <BR> <BR> <FONT SIZE=3D"2"><FONT FACE=3D"Arial">Thanks</FONT></FONT> <BR> <FONT SIZE=3D"2"><FONT FACE=3D"Arial">JWS <BR> </FONT></FONT><BR> <BR> </BLOCKQUOTE><BR> <BR> </BLOCKQUOTE><BR> </BODY> </HTML> --MS_Mac_OE_3078393956_4277012_MIME_Part-- -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
Navigate by Author:
[Previous]
[Next]
[Author Search Index]
Navigate by Subject:
[Previous]
[Next]
[Subject Search Index]
[Send Reply] [Send Message with New Topic]
[Search Selection] [Mailing List Home] [Home]