Kevrumbo
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What's next? Thinking of a look at the Princess of the Orient at 115m sometime in the future? (On trimix, this time?)
100m air dive & workup, PG
- Thread starter Tortuga68
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It aint cheap but its a far far safer and more enjoyable way to do it.
You'd likely be on 3 stages switching at 40m so helium/backgas usage isn't going to be ridiculous. Its a hypoxic mix so you'd HAVE to start on travel gas. Id stay on 32/25 or something until hitting 40m on the way down then switch.
Realistically if you're doing that sort of diving and want a sensible bottom time then its CCR territory otherwise the gas cost and quantities get ridiculous.
OP
Sas
Contributor
Make sure you have another colleague to share the instructor's helium bill !!!
18/35 for one set of twin 11L would be around US$92.00($0.06 per litre for He).
OP
It's only money
Hmm let me think about that... NO!!
But seriously... I will be back in Melbourne next month, Ben has been trying to get onto you about doing the J4/Canberra with Rusthunters or something like that
I just can't wait to dive 19 degree water again /sarc
What about a drysuit and doing some dives in Melbourne??
Hmm let me think about that... NO!!
But seriously... I will be back in Melbourne next month, Ben has been trying to get onto you about doing the J4/Canberra with Rusthunters or something like that
I just can't wait to dive 19 degree water again /sarc
Sas
Contributor
Haha actually it was 18C last weekend and 14C when I was out diving in the middle of the Bass Strait (on the Tassie side of the border so that is probably why) :cold: Had to go back to my drysuit!
I have been away diving on my holidays so haven't been around to do boat dives locally! Did a couple of shore dives last week though. And also incredibly behind in emails now, so far that I have kind of given up and thinking of staring the new year afresh so thanks for the reminder about organising dives. J4/Canberra would be good or diving with Rusthunters
mikemill
Contributor
<engineer hat>
There are attack vectors that can affect the hardware generally by hitting the firmware.
</engineer hat>
OP
Andy,
Thanks for sharing your detailed thoughts. I haven’t been ignoring them, just needed to find some time to compose a reply that was commensurate with the effort you put into your posts.
There’s no need for laboured analogies about computers, alcohol or anything else, I believe I understand your viewpoint both from this thread and others; that while skills can (and should) be practiced repetitively to become reflexive, & that symptoms can be reduced or eliminated through repeated exposure & training, the ability to exhibit the required degree of original or lateral thought in some circumstances is irredeemably compromised (feel free to correct me if that’s not an accurate summation of your opinion).
Part of the problem with this exchange is that you are making assumptions about my ‘feelings’ on the subject of narcosis & narcosis management - so let my try to address that by explaining what they actually are.
IMO narcosis can be divided into three components:
Cause - Nitrogen & other gasses entering the bloodstream and tissues under high partial pressures
Effect - Deterioration of mental ability
Symptoms – May include one or more of euphoria, anxiety, auditory & visual hallucinations etc etc
The point is not to list all the possible effects or symptoms, similarly the titles are somewhat arbitrary and for the purposes of this discussion rather than scientific or medical accuracy. These are also my own musings based on personal and anecdotal experience and therefore should not be taken or used by anyone as hard and fast rules.
Having given my definition of narcosis, what I mean when I talk about ‘managing’ it is limiting its impact on safe & enjoyable diving. That doesn’t have to mean reducing the effect (qv), the dive can be safer & more fun just by reducing the symptoms.
I don’t necessarily agree that a diver that is experienced & trained in the conditions they are diving in can be narc’d to hell and not know it. I think one benefit that experience can give you is an indication of how badly your mental capacity has deteriorated, regardless of the presence or lack of symptoms. As String says,
Rather than banging on any more about what I think, I want to use another of String’s comments as a further thought-starter:
I’m not sure what is meant by “hit far worse” – symptoms, effect or both – but if we agree that some practices (eg fast descent) cause narcosis to be worse, then conversely there are practices that can reduce narcosis (eg slow descent). Ergo ‘managing narcosis’ is a reality.
Thanks for sharing your detailed thoughts. I haven’t been ignoring them, just needed to find some time to compose a reply that was commensurate with the effort you put into your posts.
There’s no need for laboured analogies about computers, alcohol or anything else, I believe I understand your viewpoint both from this thread and others; that while skills can (and should) be practiced repetitively to become reflexive, & that symptoms can be reduced or eliminated through repeated exposure & training, the ability to exhibit the required degree of original or lateral thought in some circumstances is irredeemably compromised (feel free to correct me if that’s not an accurate summation of your opinion).
Part of the problem with this exchange is that you are making assumptions about my ‘feelings’ on the subject of narcosis & narcosis management - so let my try to address that by explaining what they actually are.
IMO narcosis can be divided into three components:
Cause - Nitrogen & other gasses entering the bloodstream and tissues under high partial pressures
Effect - Deterioration of mental ability
Symptoms – May include one or more of euphoria, anxiety, auditory & visual hallucinations etc etc
The point is not to list all the possible effects or symptoms, similarly the titles are somewhat arbitrary and for the purposes of this discussion rather than scientific or medical accuracy. These are also my own musings based on personal and anecdotal experience and therefore should not be taken or used by anyone as hard and fast rules.
Having given my definition of narcosis, what I mean when I talk about ‘managing’ it is limiting its impact on safe & enjoyable diving. That doesn’t have to mean reducing the effect (qv), the dive can be safer & more fun just by reducing the symptoms.
I don’t necessarily agree that a diver that is experienced & trained in the conditions they are diving in can be narc’d to hell and not know it. I think one benefit that experience can give you is an indication of how badly your mental capacity has deteriorated, regardless of the presence or lack of symptoms. As String says,
Rather than banging on any more about what I think, I want to use another of String’s comments as a further thought-starter:
I’m not sure what is meant by “hit far worse” – symptoms, effect or both – but if we agree that some practices (eg fast descent) cause narcosis to be worse, then conversely there are practices that can reduce narcosis (eg slow descent). Ergo ‘managing narcosis’ is a reality.
ucfdiver
Contributor
Are we sure that slow descents reduce narcosis, or are they simply allowing the mind to learn to ignore it with the extra time?
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