No-Flow Safety Factor / Margin

For a cave dive without flow, what turn strategy do you use?

  • Thirds: Safety Factor = 2

    Votes: 10 55.6%
  • Thirds + 100 psi: Safety Factor = 2.27 (3600 psi start) or 2.33 (3000 psi start)

    Votes: 2 11.1%
  • Thirds + 200 psi: Safety Factor = 2.6 (3600 psi start) or 2.75 (3000 psi start)

    Votes: 5 27.8%
  • Fourths: Safety Factor = 3

    Votes: 1 5.6%
  • Fifths: Safety Factor = 4

    Votes: 0 0.0%
  • Sixths / Intro Divers🙂 : Safety Factor = 5 (or a margin of 150% after loss of gas)

    Votes: 0 0.0%
  • Other (please elaborate in the comments)

    Votes: 1 5.6%

  • Total voters
    18

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Many thanks @inquis for asking the question. I realized that I was using very different safety factors depending on flow.

I built a simple spreadsheet to calculate the safety factor for a given turnaround pressure (column C) or calculate the turnaround pressure for a desired safety factor (column D). Input cells are in yellow, output in orange. You can use either metric or imperial units as long as you stay consistent throughout.
 

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