Search results

  1. Dennis Guichard

    Deep vs shallow SPORTS diving... which is safer?

    Yes you've got a point but he got me thinking which in itself can't be a bad thing!? They all seem to be largely just guessing at it anyway, I don't really know how us (me) common folk are really expected to understand much of it..!? Cuppa was marvellous as only a cuppa can be... :-D
  2. Dennis Guichard

    Deep vs shallow SPORTS diving... which is safer?

    I think I've thought it through... so Henry's Law is correct (naturally) because at increased depth / ambient pressure substantially more volume of gas is being driven into the tissues in the same half-life time period... 50% or 100% tissue saturation at 100m is substantially more gas absorption...
  3. Dennis Guichard

    Deep vs shallow SPORTS diving... which is safer?

    So question... because I'm having a questiony deep-thinking kind of Sunday... if a diver breathes all their gas out with a higher breathing rate in say 20-minutes vs another with a slower breathing rate doing the same but over say 40-minutes... have they both in-gassed the same amount of inert...
  4. Dennis Guichard

    Deep vs shallow SPORTS diving... which is safer?

    ah.. hang on... tissue saturation IS time based... but it's related to ambient pressure too... so at 10m depth it would take a 5-minute tissue 5 minutes to 50% saturate to 2 bar ambient pressure (30 minutes or 6 half life times to be considered near enough 100% saturated). At 100m depth it would...
  5. Dennis Guichard

    Deep vs shallow SPORTS diving... which is safer?

    Thanks Bowers, but a 5-minute tissue (say) would always take 5-minutes to 50% saturate with inert gas... unless tissue half-life's are stated at surface (atmospheric pressure) levels and those in-gassing times change in relationship to absolute pressure...? But I haven't seen that said anywhere...
  6. Dennis Guichard

    Deep vs shallow SPORTS diving... which is safer?

    Thanks Steve, I would agree, but I'm confused about how that then relates to tissue half-life's in decompression theory that are all just time based... what am I missing...?
  7. Dennis Guichard

    Deep vs shallow SPORTS diving... which is safer?

    I've got my mind into a muddle thinking through all this decompression theory and hoping someone can kindly switch my light bulb back on... Where I dive it has become common practice to do the last dive deepest simply because people controlling the dives think that a short deep dive (31m for...
  8. Dennis Guichard

    Tissue Saturation display

    Thanks Ross, I'll have a look at your software... I've just found the 'Diving Log 6.0' provides an opportunity to review (and learn) from one's dive profile post dive by showing the various tissue loadings as you scroll through you dive profile...
  9. Dennis Guichard

    Tissue Saturation display

    Please can anyone help who might know what dive log software might display tissue saturation graphs post dive... the Perdix and the Ration iX3M Pro display tissue saturation loadings whilst diving but these aren't made available in any dive log software i can find so that I can scroll through my...
  10. Dennis Guichard

    Conservative settings on Mares computers

    What I suspect happens is that ALL the sports diving recreational dive computers are purposely set to be on the conservative side to keep sports divers safer? Whereas I understand the 'more advanced' Perdix computers might run a pure Buhlmann algorithm that the user then freely sets according to...
  11. Dennis Guichard

    Conservative settings on Mares computers

    There's some dive profiles you can download from Scuba-Lab in the USA where they tested a range of computers in a chamber side by side to have a look at what sort of liberal or conservative settings they might each be programmed to - the Cressi computer they tested (the Goa) has a 9-tissue...
  12. Dennis Guichard

    Conservative settings on Mares computers

    Thanks for your feedback which I appreciate, which Cressi do you have? It seems then that the Cressi in its default setting is VERY conservative compared to your Shearwater in it's default VPM setting? The VPM and RGBM algorithms are both dual phase so you'd think they would both give similar...
  13. Dennis Guichard

    Conservative settings on Mares computers

    GFhi95 equivalent is quite 'high risk' I think for a consumer recreation computer if that's the comparison against a Buhlmann gradient factor? I find it easy to understand risk factors around GF's but with the typical P0, P1 & P2 'conservative settings' on RGBM computers (like the Mares or...
  14. Dennis Guichard

    Conservative settings on Mares computers

    shitballs... you know when you saw an interesting comment somewhere and then hours later you try and remember where it was you saw it... and of course you can never find it or remember... well I've just spent probably two hours going through my Internet history to find this blooming message...
  15. Dennis Guichard

    Conservative settings on Mares computers

    Does anyone happen to know what the P0 (standard setting / least conservative), P1 & P2 (most conservative) settings actually influence or refer to in the range of Mares dive computers? It would be helpful to understand if anyone can relate that to comparative gradient factors - I KNOW the...
Back
Top Bottom