SH125: "Known Unknowns" - Are they considered enough in diving...?

SH125: "Known Unknowns" - Are they considered enough in diving...?

In this episode, we explore Donald Rumsfeld's "known knowns, known unknowns, and unknown unknowns" concept and how it applies to risk management in diving. Using the Johari window model of self-reflection, we discuss the importance of understanding risks that divers face, from routine (known knowns) to unpredictable (unknown unknowns). The episode highlights the role of experience, training, and non-technical skills in preventing accidents and managing emergencies. Listeners will gain insights on improving their decision-making and awareness, so they can better navigate both anticipated and unforeseen challenges in their diving journeys.

Original blog: https://www.thehumandiver.com/blog/known-unknowns-are-they-considered-enough-in-diving

Links: Johari Window: https://en.wikipedia.org/wiki/Johari_window

Dunning Kruger effect: https://www.thehumandiver.com/blog/incompetent-and-unaware-you-don-t-know-what-you-don-t-know

Experience blog: https://www.thehumandiver.com/blog/complacency-the-silent-killer-but-it-s-not-that-simple

Charles Perrow, Normal Accidents: https://en.wikipedia.org/wiki/Normal_Accidents

Parker Turner’s cave collapse: https://www.sciencedaily.com/releases/2015/09/150901121005.htm

Aqaurius Project fatality: https://en.wikipedia.org/wiki/Dewey_Smith

Tags: English, Gareth Lock

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Episoder(296)

SH296: When 'I'm Fine' Isn't True: Speaking Up and Ending the Dive

SH296: When 'I'm Fine' Isn't True: Speaking Up and Ending the Dive

This episode explores a diving incident where nothing officially “went wrong,” yet a series of small decisions and social pressures nearly led to tragedy. A newer CCR diver and his wife joined more ex...

15 Jul 13min

SH295: Four Ways We Talk About 'Human Factors' in Diving

SH295: Four Ways We Talk About 'Human Factors' in Diving

This episode explores what people really mean when they talk about “human factors” in diving—and why the term can sometimes create more confusion than clarity. It looks at four different ways the phra...

11 Jul 11min

SH294: Clickbait, trolls and comments. How dive incident posts can teach us — if we let them

SH294: Clickbait, trolls and comments. How dive incident posts can teach us — if we let them

Discussions about diving incidents on social media often follow a predictable pattern: a short, simplified post describes what happened, and comments quickly focus on blaming the individual involved, ...

8 Jul 13min

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 Jul 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 Jul 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 Jun 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 Jun 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 Jun 24min

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