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Gradient Factors - What is Everyone Using?

Discussion in 'Advanced Scuba Discussions' started by UCFKnightDiver, Jul 17, 2020.

  1. JonG1

    JonG1 Barracuda

    # of Dives: 2,500 - 4,999
    Location: Glossop UK
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    Currently 60/75 but haven't done much deep stuff to get a true feel for it since changing from 50/70

    I came back to diving after a 20 yr lay off due to a PFO, now fixed.

    Initially I tried out 80/80 but got a pain only shoulder hit on a repetitive deco dive.

    I then switched to 50/70 and no issues since then.

    It is worth noting though that unless you are very rigid with your schedule, ascent rate, gas switches, padding, set point etc your actual GF may be different from what you intended to dive.
     
    rjack321 likes this.
  2. jvogt

    jvogt ScubaBoard Sponsor ScubaBoard Sponsor

    # of Dives: 200 - 499
    Location: Lakewood, CO USA
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    Took a shoulder joint hit on 50/80, then small skin bend on 60/75. Now I have been at 55/70 successfully for a while.

    I'm attempting to reschedule my PFO test this week.

    I am considering 40/50 this weekend for a dive at 11k feet with 40 degree bottom temps.
     
  3. Mike1967

    Mike1967 Manta Ray

    # of Dives: 100 - 199
    Location: Victoria, Australia
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    Huh:confused:
     
  4. jvogt

    jvogt ScubaBoard Sponsor ScubaBoard Sponsor

    # of Dives: 200 - 499
    Location: Lakewood, CO USA
    352
    288
    63
    Elevation
     
    Mike1967 and UCFKnightDiver like this.
  5. jvogt

    jvogt ScubaBoard Sponsor ScubaBoard Sponsor

    # of Dives: 200 - 499
    Location: Lakewood, CO USA
    352
    288
    63
    UCFKnightDiver likes this.
  6. UCFKnightDiver

    UCFKnightDiver ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Florida
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  7. dmaziuk

    dmaziuk Regular of the Pub

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  8. Dr Simon Mitchell

    Dr Simon Mitchell ScubaBoard Supporter Staff Member ScubaBoard Supporter

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    Hi, yes, you are right - quite similar. But the recent one for the Polish on-line meeting has a bit more contextualizing information, some new evidence, and was for a non-medical audience so the explanations are a little fuller - and because I was being translated live I went fairly slowly so its longer so you may lose the will to live. However, for those interested in the subject there is probably a lot to be gained from watching it.

    Simon M
     
    Rollin Bonz, Ayisha, eleniel and 6 others like this.
  9. KWS

    KWS ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 500 - 999
    Location: SE TEXAS
    4,933
    1,264
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    if you are a rec diver low is fine or perhaps med if it is cold. all things I have read says low unless you are working cold or something else to justify it. You realize that a gf of 70 does not give you much bottom time in exchange for little if any benefit. How much depends on the computer you are using.
     
  10. tursiops

    tursiops Marine Scientist and Master Instructor ScubaBoard Supporter

    # of Dives: 2,500 - 4,999
    Location: U.S. East Coast
    10,445
    8,193
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    If the computer is running Buhlman with a GF then it doesn't matter which computer it is; they will all give nearly the same answer for the same GF..
     

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