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#1
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| I think this has been covered -ad nauseam- in earlier posts. "Charlie Hammond" <hammond@not@peek.ssr.hp.com> wrote in message news:W51yc.3428$os2.1947@news.cpqcorp.net... > In another topic the point/suggestion was made that, at least for certain > deeper dives, one should have EITHER a good/experienced buddy OR a pony. > > (A "pony" is a small -- 13-30 cuft -- air cylinder with its own SCUBA.) > > I suggest that because the "rule or thirds" is not typically followed > in open water diving, a pony may be necessary/desirable regardless of > your buddy's skill. > > The "rule of thirds" referes to cave diving. Although it can be more > complicated with different size air cylinders, it basically sas that > 1/3 of my air is for me going in to the cave, 1/3 for me going out, > and the final 1/3 as an emergency backup for my buddy. This rule > ensures that either diver in a buddy team will have enough air for > BOTH divers to exit safely at any point in the dive. > > In open water this may not always work out to "thirds" because, unlike > a cave, it is alwasy possible in open water, NDL diving to ascend > directly to the surface. > > However, common open water practice is for each diver to ensure only > that he/she has enough air remaining for him/herself to ascend. > So, for example, it is unlikely that at the end of a 20min, 100ft > dive that either diver will have enough air for both to ascend safely. > Thus a catastrophic loss of either divers air would leave them short > of air for a safe ascent. > > I can only see three ways to overcome this: > > 1) Follow the "rule of tirds", modified as appropriate. > > 1A) This could be done by shortening the dive duration, but nobody > wants to do that. > > 1B) Larger air cylinders could also be used, but in may cases AL 80s > are the default and may be the only cylinders available. > > 2) Cary a pony tank. > > > 1A is probably not going to happen. > > 1B has problems transporting a large tank for travel. > > 1B and 2 both entail the cost of a larger or "extra" cylinder. > > > So what do all you boys and girls think about this? > -- > Charlie Hammond -- Hewlett-Packard Company -- Ft Lauderdale FL USA > (hammond@not@peek.ssr.hp.com -- remove "@not" when replying) > All opinions expressed are my own and not necessarily my employer's. > |
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#2
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| I think this has been covered -ad nauseam- in earlier posts. "Charlie Hammond" <hammond@not@peek.ssr.hp.com> wrote in message news:W51yc.3428$os2.1947@news.cpqcorp.net... > In another topic the point/suggestion was made that, at least for certain > deeper dives, one should have EITHER a good/experienced buddy OR a pony. > > (A "pony" is a small -- 13-30 cuft -- air cylinder with its own SCUBA.) > > I suggest that because the "rule or thirds" is not typically followed > in open water diving, a pony may be necessary/desirable regardless of > your buddy's skill. > > The "rule of thirds" referes to cave diving. Although it can be more > complicated with different size air cylinders, it basically sas that > 1/3 of my air is for me going in to the cave, 1/3 for me going out, > and the final 1/3 as an emergency backup for my buddy. This rule > ensures that either diver in a buddy team will have enough air for > BOTH divers to exit safely at any point in the dive. > > In open water this may not always work out to "thirds" because, unlike > a cave, it is alwasy possible in open water, NDL diving to ascend > directly to the surface. > > However, common open water practice is for each diver to ensure only > that he/she has enough air remaining for him/herself to ascend. > So, for example, it is unlikely that at the end of a 20min, 100ft > dive that either diver will have enough air for both to ascend safely. > Thus a catastrophic loss of either divers air would leave them short > of air for a safe ascent. > > I can only see three ways to overcome this: > > 1) Follow the "rule of tirds", modified as appropriate. > > 1A) This could be done by shortening the dive duration, but nobody > wants to do that. > > 1B) Larger air cylinders could also be used, but in may cases AL 80s > are the default and may be the only cylinders available. > > 2) Cary a pony tank. > > > 1A is probably not going to happen. > > 1B has problems transporting a large tank for travel. > > 1B and 2 both entail the cost of a larger or "extra" cylinder. > > > So what do all you boys and girls think about this? > -- > Charlie Hammond -- Hewlett-Packard Company -- Ft Lauderdale FL USA > (hammond@not@peek.ssr.hp.com -- remove "@not" when replying) > All opinions expressed are my own and not necessarily my employer's. > |
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#3
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| I think this has been covered -ad nauseam- in earlier posts. "Charlie Hammond" <hammond@not@peek.ssr.hp.com> wrote in message news:W51yc.3428$os2.1947@news.cpqcorp.net... > In another topic the point/suggestion was made that, at least for certain > deeper dives, one should have EITHER a good/experienced buddy OR a pony. > > (A "pony" is a small -- 13-30 cuft -- air cylinder with its own SCUBA.) > > I suggest that because the "rule or thirds" is not typically followed > in open water diving, a pony may be necessary/desirable regardless of > your buddy's skill. > > The "rule of thirds" referes to cave diving. Although it can be more > complicated with different size air cylinders, it basically sas that > 1/3 of my air is for me going in to the cave, 1/3 for me going out, > and the final 1/3 as an emergency backup for my buddy. This rule > ensures that either diver in a buddy team will have enough air for > BOTH divers to exit safely at any point in the dive. > > In open water this may not always work out to "thirds" because, unlike > a cave, it is alwasy possible in open water, NDL diving to ascend > directly to the surface. > > However, common open water practice is for each diver to ensure only > that he/she has enough air remaining for him/herself to ascend. > So, for example, it is unlikely that at the end of a 20min, 100ft > dive that either diver will have enough air for both to ascend safely. > Thus a catastrophic loss of either divers air would leave them short > of air for a safe ascent. > > I can only see three ways to overcome this: > > 1) Follow the "rule of tirds", modified as appropriate. > > 1A) This could be done by shortening the dive duration, but nobody > wants to do that. > > 1B) Larger air cylinders could also be used, but in may cases AL 80s > are the default and may be the only cylinders available. > > 2) Cary a pony tank. > > > 1A is probably not going to happen. > > 1B has problems transporting a large tank for travel. > > 1B and 2 both entail the cost of a larger or "extra" cylinder. > > > So what do all you boys and girls think about this? > -- > Charlie Hammond -- Hewlett-Packard Company -- Ft Lauderdale FL USA > (hammond@not@peek.ssr.hp.com -- remove "@not" when replying) > All opinions expressed are my own and not necessarily my employer's. > |
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#4
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| I think this has been covered -ad nauseam- in earlier posts. "Charlie Hammond" <hammond@not@peek.ssr.hp.com> wrote in message news:W51yc.3428$os2.1947@news.cpqcorp.net... > In another topic the point/suggestion was made that, at least for certain > deeper dives, one should have EITHER a good/experienced buddy OR a pony. > > (A "pony" is a small -- 13-30 cuft -- air cylinder with its own SCUBA.) > > I suggest that because the "rule or thirds" is not typically followed > in open water diving, a pony may be necessary/desirable regardless of > your buddy's skill. > > The "rule of thirds" referes to cave diving. Although it can be more > complicated with different size air cylinders, it basically sas that > 1/3 of my air is for me going in to the cave, 1/3 for me going out, > and the final 1/3 as an emergency backup for my buddy. This rule > ensures that either diver in a buddy team will have enough air for > BOTH divers to exit safely at any point in the dive. > > In open water this may not always work out to "thirds" because, unlike > a cave, it is alwasy possible in open water, NDL diving to ascend > directly to the surface. > > However, common open water practice is for each diver to ensure only > that he/she has enough air remaining for him/herself to ascend. > So, for example, it is unlikely that at the end of a 20min, 100ft > dive that either diver will have enough air for both to ascend safely. > Thus a catastrophic loss of either divers air would leave them short > of air for a safe ascent. > > I can only see three ways to overcome this: > > 1) Follow the "rule of tirds", modified as appropriate. > > 1A) This could be done by shortening the dive duration, but nobody > wants to do that. > > 1B) Larger air cylinders could also be used, but in may cases AL 80s > are the default and may be the only cylinders available. > > 2) Cary a pony tank. > > > 1A is probably not going to happen. > > 1B has problems transporting a large tank for travel. > > 1B and 2 both entail the cost of a larger or "extra" cylinder. > > > So what do all you boys and girls think about this? > -- > Charlie Hammond -- Hewlett-Packard Company -- Ft Lauderdale FL USA > (hammond@not@peek.ssr.hp.com -- remove "@not" when replying) > All opinions expressed are my own and not necessarily my employer's. > |
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#5
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| I think this has been covered -ad nauseam- in earlier posts. "Charlie Hammond" <hammond@not@peek.ssr.hp.com> wrote in message news:W51yc.3428$os2.1947@news.cpqcorp.net... > In another topic the point/suggestion was made that, at least for certain > deeper dives, one should have EITHER a good/experienced buddy OR a pony. > > (A "pony" is a small -- 13-30 cuft -- air cylinder with its own SCUBA.) > > I suggest that because the "rule or thirds" is not typically followed > in open water diving, a pony may be necessary/desirable regardless of > your buddy's skill. > > The "rule of thirds" referes to cave diving. Although it can be more > complicated with different size air cylinders, it basically sas that > 1/3 of my air is for me going in to the cave, 1/3 for me going out, > and the final 1/3 as an emergency backup for my buddy. This rule > ensures that either diver in a buddy team will have enough air for > BOTH divers to exit safely at any point in the dive. > > In open water this may not always work out to "thirds" because, unlike > a cave, it is alwasy possible in open water, NDL diving to ascend > directly to the surface. > > However, common open water practice is for each diver to ensure only > that he/she has enough air remaining for him/herself to ascend. > So, for example, it is unlikely that at the end of a 20min, 100ft > dive that either diver will have enough air for both to ascend safely. > Thus a catastrophic loss of either divers air would leave them short > of air for a safe ascent. > > I can only see three ways to overcome this: > > 1) Follow the "rule of tirds", modified as appropriate. > > 1A) This could be done by shortening the dive duration, but nobody > wants to do that. > > 1B) Larger air cylinders could also be used, but in may cases AL 80s > are the default and may be the only cylinders available. > > 2) Cary a pony tank. > > > 1A is probably not going to happen. > > 1B has problems transporting a large tank for travel. > > 1B and 2 both entail the cost of a larger or "extra" cylinder. > > > So what do all you boys and girls think about this? > -- > Charlie Hammond -- Hewlett-Packard Company -- Ft Lauderdale FL USA > (hammond@not@peek.ssr.hp.com -- remove "@not" when replying) > All opinions expressed are my own and not necessarily my employer's. > |
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#6
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| I think this has been covered -ad nauseam- in earlier posts. "Charlie Hammond" <hammond@not@peek.ssr.hp.com> wrote in message news:W51yc.3428$os2.1947@news.cpqcorp.net... > In another topic the point/suggestion was made that, at least for certain > deeper dives, one should have EITHER a good/experienced buddy OR a pony. > > (A "pony" is a small -- 13-30 cuft -- air cylinder with its own SCUBA.) > > I suggest that because the "rule or thirds" is not typically followed > in open water diving, a pony may be necessary/desirable regardless of > your buddy's skill. > > The "rule of thirds" referes to cave diving. Although it can be more > complicated with different size air cylinders, it basically sas that > 1/3 of my air is for me going in to the cave, 1/3 for me going out, > and the final 1/3 as an emergency backup for my buddy. This rule > ensures that either diver in a buddy team will have enough air for > BOTH divers to exit safely at any point in the dive. > > In open water this may not always work out to "thirds" because, unlike > a cave, it is alwasy possible in open water, NDL diving to ascend > directly to the surface. > > However, common open water practice is for each diver to ensure only > that he/she has enough air remaining for him/herself to ascend. > So, for example, it is unlikely that at the end of a 20min, 100ft > dive that either diver will have enough air for both to ascend safely. > Thus a catastrophic loss of either divers air would leave them short > of air for a safe ascent. > > I can only see three ways to overcome this: > > 1) Follow the "rule of tirds", modified as appropriate. > > 1A) This could be done by shortening the dive duration, but nobody > wants to do that. > > 1B) Larger air cylinders could also be used, but in may cases AL 80s > are the default and may be the only cylinders available. > > 2) Cary a pony tank. > > > 1A is probably not going to happen. > > 1B has problems transporting a large tank for travel. > > 1B and 2 both entail the cost of a larger or "extra" cylinder. > > > So what do all you boys and girls think about this? > -- > Charlie Hammond -- Hewlett-Packard Company -- Ft Lauderdale FL USA > (hammond@not@peek.ssr.hp.com -- remove "@not" when replying) > All opinions expressed are my own and not necessarily my employer's. > |
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#7
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| I think this has been covered -ad nauseam- in earlier posts. "Charlie Hammond" <hammond@not@peek.ssr.hp.com> wrote in message news:W51yc.3428$os2.1947@news.cpqcorp.net... > In another topic the point/suggestion was made that, at least for certain > deeper dives, one should have EITHER a good/experienced buddy OR a pony. > > (A "pony" is a small -- 13-30 cuft -- air cylinder with its own SCUBA.) > > I suggest that because the "rule or thirds" is not typically followed > in open water diving, a pony may be necessary/desirable regardless of > your buddy's skill. > > The "rule of thirds" referes to cave diving. Although it can be more > complicated with different size air cylinders, it basically sas that > 1/3 of my air is for me going in to the cave, 1/3 for me going out, > and the final 1/3 as an emergency backup for my buddy. This rule > ensures that either diver in a buddy team will have enough air for > BOTH divers to exit safely at any point in the dive. > > In open water this may not always work out to "thirds" because, unlike > a cave, it is alwasy possible in open water, NDL diving to ascend > directly to the surface. > > However, common open water practice is for each diver to ensure only > that he/she has enough air remaining for him/herself to ascend. > So, for example, it is unlikely that at the end of a 20min, 100ft > dive that either diver will have enough air for both to ascend safely. > Thus a catastrophic loss of either divers air would leave them short > of air for a safe ascent. > > I can only see three ways to overcome this: > > 1) Follow the "rule of tirds", modified as appropriate. > > 1A) This could be done by shortening the dive duration, but nobody > wants to do that. > > 1B) Larger air cylinders could also be used, but in may cases AL 80s > are the default and may be the only cylinders available. > > 2) Cary a pony tank. > > > 1A is probably not going to happen. > > 1B has problems transporting a large tank for travel. > > 1B and 2 both entail the cost of a larger or "extra" cylinder. > > > So what do all you boys and girls think about this? > -- > Charlie Hammond -- Hewlett-Packard Company -- Ft Lauderdale FL USA > (hammond@not@peek.ssr.hp.com -- remove "@not" when replying) > All opinions expressed are my own and not necessarily my employer's. > |
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#8
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| I think this has been covered -ad nauseam- in earlier posts. "Charlie Hammond" <hammond@not@peek.ssr.hp.com> wrote in message news:W51yc.3428$os2.1947@news.cpqcorp.net... > In another topic the point/suggestion was made that, at least for certain > deeper dives, one should have EITHER a good/experienced buddy OR a pony. > > (A "pony" is a small -- 13-30 cuft -- air cylinder with its own SCUBA.) > > I suggest that because the "rule or thirds" is not typically followed > in open water diving, a pony may be necessary/desirable regardless of > your buddy's skill. > > The "rule of thirds" referes to cave diving. Although it can be more > complicated with different size air cylinders, it basically sas that > 1/3 of my air is for me going in to the cave, 1/3 for me going out, > and the final 1/3 as an emergency backup for my buddy. This rule > ensures that either diver in a buddy team will have enough air for > BOTH divers to exit safely at any point in the dive. > > In open water this may not always work out to "thirds" because, unlike > a cave, it is alwasy possible in open water, NDL diving to ascend > directly to the surface. > > However, common open water practice is for each diver to ensure only > that he/she has enough air remaining for him/herself to ascend. > So, for example, it is unlikely that at the end of a 20min, 100ft > dive that either diver will have enough air for both to ascend safely. > Thus a catastrophic loss of either divers air would leave them short > of air for a safe ascent. > > I can only see three ways to overcome this: > > 1) Follow the "rule of tirds", modified as appropriate. > > 1A) This could be done by shortening the dive duration, but nobody > wants to do that. > > 1B) Larger air cylinders could also be used, but in may cases AL 80s > are the default and may be the only cylinders available. > > 2) Cary a pony tank. > > > 1A is probably not going to happen. > > 1B has problems transporting a large tank for travel. > > 1B and 2 both entail the cost of a larger or "extra" cylinder. > > > So what do all you boys and girls think about this? > -- > Charlie Hammond -- Hewlett-Packard Company -- Ft Lauderdale FL USA > (hammond@not@peek.ssr.hp.com -- remove "@not" when replying) > All opinions expressed are my own and not necessarily my employer's. > |
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#9
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| I think this has been covered -ad nauseam- in earlier posts. "Charlie Hammond" <hammond@not@peek.ssr.hp.com> wrote in message news:W51yc.3428$os2.1947@news.cpqcorp.net... > In another topic the point/suggestion was made that, at least for certain > deeper dives, one should have EITHER a good/experienced buddy OR a pony. > > (A "pony" is a small -- 13-30 cuft -- air cylinder with its own SCUBA.) > > I suggest that because the "rule or thirds" is not typically followed > in open water diving, a pony may be necessary/desirable regardless of > your buddy's skill. > > The "rule of thirds" referes to cave diving. Although it can be more > complicated with different size air cylinders, it basically sas that > 1/3 of my air is for me going in to the cave, 1/3 for me going out, > and the final 1/3 as an emergency backup for my buddy. This rule > ensures that either diver in a buddy team will have enough air for > BOTH divers to exit safely at any point in the dive. > > In open water this may not always work out to "thirds" because, unlike > a cave, it is alwasy possible in open water, NDL diving to ascend > directly to the surface. > > However, common open water practice is for each diver to ensure only > that he/she has enough air remaining for him/herself to ascend. > So, for example, it is unlikely that at the end of a 20min, 100ft > dive that either diver will have enough air for both to ascend safely. > Thus a catastrophic loss of either divers air would leave them short > of air for a safe ascent. > > I can only see three ways to overcome this: > > 1) Follow the "rule of tirds", modified as appropriate. > > 1A) This could be done by shortening the dive duration, but nobody > wants to do that. > > 1B) Larger air cylinders could also be used, but in may cases AL 80s > are the default and may be the only cylinders available. > > 2) Cary a pony tank. > > > 1A is probably not going to happen. > > 1B has problems transporting a large tank for travel. > > 1B and 2 both entail the cost of a larger or "extra" cylinder. > > > So what do all you boys and girls think about this? > -- > Charlie Hammond -- Hewlett-Packard Company -- Ft Lauderdale FL USA > (hammond@not@peek.ssr.hp.com -- remove "@not" when replying) > All opinions expressed are my own and not necessarily my employer's. > |
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#10
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| In article <FD1yc.24183$NT6.13099@clgrps13>, Firewalker <firewalker2222@hotmail.com> wrote: € I think this has been covered -ad nauseam- in earlier posts. With more accuracy, too. -- "We're going to rush the hijackers." -Jeremy Glick, aboard United Airlines flight 93, September 11, 2001 |
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| Thread | Thread Starter | Forum | Replies | Last Post |
| FS: 12.2 L ams 3 L Pony | press F1 for help | Gear | 0 | 03-27-2007 12:48 AM |
| Pony | Stef | United Kingdom of Great Britain & N. Ireland | 2 | 03-26-2007 11:44 PM |
| My little pony | Ron MacRae | United Kingdom of Great Britain & N. Ireland | 7 | 03-26-2007 11:08 PM |
| wtb: pony bottle | net | United Kingdom of Great Britain & N. Ireland | 0 | 03-26-2007 11:05 PM |
| Pony and second stages | Clive | United Kingdom of Great Britain & N. Ireland | 129 | 03-26-2007 11:03 PM |