SH237: Decision Making: Normalisation of Deviance in Rebreather Cave Diving

SH237: Decision Making: Normalisation of Deviance in Rebreather Cave Diving

In this episode, we explore how easy it is for divers to drift into unsafe habits when risky behaviour seems to have no consequences, especially in small or high-performing cave and technical diving teams. A real example from a cave rebreather class shows how a simple shortcut- only a few metres and seemingly low-risk- could have broken a key rule of always maintaining a continuous guideline. Even when a team is skilled and conditions look perfect, small deviations can become normalised and lead to bigger risks later. We talk about why psychological safety, honest communication, and clear team standards are essential for spotting drift, challenging unsafe ideas, and learning from each other.

Original blog: https://www.thehumandiver.com/blog/top-tips-blog-normalisation-of-deviance-in-rebreather-cave-diving

Links: Normalisation of deviance: https://www.thehumandiver.com/blog/normalisation-of-deviance-not-about-rule-breaking

Psychological safety: https://www.thehumandiver.com/blog/what-we-get-wrong-about-psychological-safety-in-diving

Tags: English, Cave Diving, CCR, Decision Making, Lanny Vogel, Normalisation of Deviance, Teamwork

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Jaksot(293)

SH293: Why does nothing change? Why do the same failures keep happening?

SH293: Why does nothing change? Why do the same failures keep happening?

Over the past decade, diving fatalities have remained stubbornly consistent despite better equipment, more training, and growing participation, suggesting the problem isn’t just technical or individua...

4 Heinä 22min

SH292: Learning or Blaming: The Choice the Diving Industry Needs to Make. Part 3 of 3.

SH292: Learning or Blaming: The Choice the Diving Industry Needs to Make. Part 3 of 3.

This final blog explores what the research means and how the diving community can realistically improve learning and safety. It argues that the problem is not broken individuals but a system that quie...

1 Heinä 14min

SH291: What the Data Told Us: Fear, Trust, and the Stories That Never Get Told. Part 2 of 3.

SH291: What the Data Told Us: Fear, Trust, and the Stories That Never Get Told. Part 2 of 3.

This blog explains how a mixed-methods study explored why divers struggle to share honest, learning-focused stories about incidents. Using a large international survey, focus groups, and expert interv...

27 Kesä 13min

SH290: What Happens Underwater, Stays Underwater — And That's a Problem. Part 1 of 3

SH290: What Happens Underwater, Stays Underwater — And That's a Problem. Part 1 of 3

This episode introduces the problem behind learning in diving safety, using the 2020 death of Linnea Mills to highlight how incidents are often caused by deeper system issues, not just individual mist...

24 Kesä 12min

SH289: Chac Mool - Diving Deeper into a Triple Fatality with Human Factors

SH289: Chac Mool - Diving Deeper into a Triple Fatality with Human Factors

This episode examines a 2012 triple fatality at Cenote Chac Mool in Mexico using a Human Factors approach, showing how accidents are rarely caused by a single mistake but by a combination of small, in...

20 Kesä 24min

SH288: The 'Obvious Thing' Nobody Noticed

SH288: The 'Obvious Thing' Nobody Noticed

This episode explores the fatal case of 18-year-old Linnea Mills to show how visible hazards can go unnoticed when an instructor lacks the mental capacity to recognise them. Linnea was overweighted, u...

17 Kesä 15min

SH287: When the Picture Goes Dark

SH287: When the Picture Goes Dark

This episode explores why divers don’t truly “lose” situation awareness, but instead run out of the mental capacity needed to maintain it. Through the story of James on a challenging wreck dive, it sh...

13 Kesä 16min

SH286: The Shortcut That Gets You Home — and the One That Doesn't

SH286: The Shortcut That Gets You Home — and the One That Doesn't

Divers make many decisions quickly, often without realising it, by using heuristics—mental shortcuts that help us act fast when time and information are limited. These shortcuts are essential and ofte...

10 Kesä 10min

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