This episode dives into the critical role of human factors in safety, using a tragic aviation incident and its parallels in diving to illustrate how distractions, pressures, and systemic issues contribute to accidents. We explore how a Royal Air Force training film, "Distractions," highlighted the cumulative factors behind a hypothetical crash, emphasizing the need for shared responsibility in preventing errors. Similarly, the story of Brian Bugge's 2018 diving accident reveals the dangers of focusing solely on individual mistakes while overlooking the broader contributing factors. Accidents rarely result from a single error but emerge from a combination of conditions. By understanding these dynamics, we can better mitigate risks and improve safety in both aviation and diving.

Original blog: https://www.thehumandiver.com/blog/outcomes-are-so-sexy

Links: “If Only” Documentary: https://www.thehumandiver.com/ifonly

Tags:  English, CCR, Checklists, Decision Making, Gareth Lock, If Only, Investigations, Rebreather

In this episode, a newly qualified Human Factors in Diving Instructor shares their journey of grappling with impostor syndrome and the challenges of teaching human factors to divers. Despite over a decade of diving instruction experience, they recount feeling inadequate compared to peers and doubting their knowledge, especially when students might view human factors as "common sense." Reflecting on the Dunning-Kruger effect, they explore how experts often underestimate their abilities because they understand the vastness of their field. Through conversations with peers and self-reflection, they learn to embrace the value they bring to the classroom and the importance of fostering curiosity in their students.

Original blog: https://www.thehumandiver.com/blog/the-best-is-the-enemy-of-the-good

Tags:  English, Communications, Jenny Lord, Leadership, Teamwork

This episode dives into the critical importance of recognizing deviations from the norm in diving, a concept rooted in situational awareness. Inspired by the 1972 attack at Lod Airport, Bart den Ouden draws parallels between how assumptions can blind us and the role of training and experience in diving. By understanding what “normal” looks like, divers can detect and respond to unexpected changes. We explore mental models, decision-making under pressure, and the value of learning skills the right way to build a strong foundation. Tune in to learn why paying attention to the small details can make all the difference underwater!

Original blog: https://www.thehumandiver.com/blog/predicitive-profiling

Links: Situational Awareness and Decision Making in Diving: https://gue.com/blog/situational-awareness-and-decision-making-in-diving/?fbclid=IwAR1Pq5eqIxWxcc0s1S2CoYefJgkWeXy_pUi8AsjQ8BoKSx-xKKXrLTPqleQ

Tags:  English, Bart Den Ouden, Decision Making

In this episode, we explore the pitfalls of blindly trusting technology through two cautionary tales—one about a GPS mishap in snowy Quebec and another about divers relying solely on their computers. Automation offers precision and convenience, but over-reliance can dull our awareness and problem-solving skills. We discuss how this applies to diving, where dive computers are invaluable but prone to errors if misconfigured or when they fail. Listeners will learn why it’s essential to combine technology with old-school skills, planning, and situational awareness to ensure safety. Embrace technology, but always have a backup plan!

Original blog: https://www.thehumandiver.com/blog/the-good-the-bad-the-ugly

Tags:  English, Decision Making, Helene Pellerin, Situational Awareness

In this episode, we explore how safety in diving is not just about avoiding accidents but about building systems that can fail safely. Drawing on a real-life incident shared by Phil Short, we examine how a small technical issue—debris in a rebreather valve—could have escalated into a life-threatening situation during a cave dive. We highlight the critical role of technical preparation, situational awareness, and non-technical skills like teamwork, leadership, and communication in managing and recovering from unexpected challenges. By sharing these stories, we aim to help divers understand how to plan for failures and enhance safety through learning, reflection, and a chronic unease about what could go wrong.

Original blog: https://www.thehumandiver.com/blog/failing-safely-400m-back-in-a-cave

Links: How Safe is Your Diving blog: https://www.thehumandiver.com/blog/how-safe-is-your-diving

Tags:  English, CCR, Decision Making, Gareth Lock, Leadership, Non-Technical Skills, Teamwork

In this episode, we dive into the concept of psychological safety and its critical role in diving and team performance. Psychological safety, defined as a shared belief that it's safe to take interpersonal risks, enables people to ask questions, make mistakes, contribute ideas, and challenge the status quo without fear of judgment or reprisal. Drawing on insights from experts like Amy Edmondson and Dr. Timothy Clark, we explore its four stages: inclusion, learner safety, contributor safety, and challenger safety, with a focus on how each stage impacts divers, instructors, and teams. From life-or-death scenarios to fostering innovation, creating a culture of psychological safety can improve decision-making, teamwork, and training outcomes. Tune in to learn how to build this essential skill in your diving and beyond.

Original blog: https://www.thehumandiver.com/blog/how-safe-is-your-diving

Links: If Only video: https://vimeo.com/382399090

Debrief guide: https://www.thehumandiver.com/debrief

Psychological Safety and Learning Behaviour in Work Teams: http://web.mit.edu/curhan/www/docs/Articles/15341_Readings/Group_Performance/Edmondson%20Psychological%20safety.pdf

High Performing Teams need Psychological Safety: https://liberationist.org/high-performing-teams-need-psychological-safety/

What Psychological Safety is not: https://qz.com/work/1470164/what-is-psychological-safety/

Tags:  English, Communication, Decision Making, Gareth Lock, Just Culture, Leadership, Teamwork

In this episode, we explore the double-edged nature of goal setting—how it drives achievement but can also lead to risky decisions when pressure and commitment override safety and judgment. Using examples from mountaineering and advanced diving, including a personal story about a challenging CCR trimix course, we delve into the concept of "destructive goal setting." The discussion highlights how external pressures and an unwillingness to abandon goals can cloud decision-making, and emphasizes the importance of open communication, team empowerment, and stepping back to reassess whether "the juice is worth the squeeze."

Original blog: https://www.thehumandiver.com/blog/is-the-juice-worth-the-squeeze

Tags:  English, Cognitive Biases, Decision Making, Guy Shockey

In this episode, we explore the concept of counterfactual reasoning—our tendency to imagine how incidents could have been avoided by different actions—and why it falls short in improving safety. While this type of hindsight helps us feel better by creating a sense of order, it doesn’t address the real-world conditions or decisions that led to the incident. Instead of asking, "Why didn’t they do Y instead of X?" we should ask, "How did doing X make sense to them at the time?" By focusing on what actually happened and understanding the context, we can uncover valuable insights to improve safety and decision-making in diving.

Original blog: https://www.thehumandiver.com/blog/counter-factuals

Tags:  English, Cognitive Biases, Decision Making, Gareth Lock, Incident Analysis

In this episode, we explore a personal account of a Gareth’s experience with decompression sickness (DCS) and the critical decision-making process that followed. The story dives into the internal monologue, biases, and stigmas surrounding DCS, highlighting how emotions and uncertainties influence risk-based decisions. We also examine industry practices, the importance of creating a psychologically safe culture for discussing incidents, and the need for better preparedness when things go wrong. This episode challenges listeners to reflect on their own decision-making and encourages a shift toward curiosity and learning in the diving community.

Original blog: https://www.thehumandiver.com/blog/the-bend-is-uninteresting-the-related-decisions-are-much-more-so

Links: PACE model: https://gcaptain.com/graded-assertiveness-captain-i-have-a-concern/

Prospect Theory: https://www.jstor.org/stable/1914185

Blog about Normalisation of Deviance: https://www.thehumandiver.com/blog/being-a-deviant-is-normal

Distancing through Differencing: https://www.researchgate.net/profile/David_Woods11/publication/292504703_Distancing_through_differencing_An_obstacle_to_organizational_learning_following_accidents/links/5742fb1808ae9ace8418b7ea/Distancing-through-differencing-An-obstacle-to-organizational-learning-following-accidents.pdf

Tags: English, Decision Making, Gareth Lock

In this episode, we explore Professor James Reason's Swiss Cheese Model, which helps explain how incidents occur when multiple safety barriers fail at different levels within a system. We discuss how organizational, supervisory, and individual errors can combine to create accidents, and how the holes in these barriers move and shift over time. Using dynamic models, we highlight that safety is an emergent property of a system, where small errors accumulate and can lead to larger, more significant failures. We also examine the role of human error, risk management, and attention to detail in preventing accidents and emphasize the complexity of real-world systems, where multiple factors often lead to a critical mass of failure before an incident happens.

Original blog: https://www.thehumandiver.com/blog/when-the-holes-line-up

Links: Animated simple Swiss Cheese model: https://vimeo.com/326723142

Big Hole model: https://vimeo.com/326723122

Little Hole model: https://vimeo.com/326723109

Tags:  English, Gareth Lock, Human Factors, Incident Investigation