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Back to Fundamentals: An Introduction to GUE’s Most Popular Diving Course
Instructor evaluator Rich Walker attempts to answer the question, “why is Fundamentals GUE’s most popular diving course?” Along the way, he clarifies some of the myths and misconceptions about GUE training. Hint: there is no Kool-Aid.

by Richard Walker
For the first 10 years of my diving, I was a recreational diver. I dived on most weekends and had a great time. However, there was something in the back of my mind that wasn’t quite right. My training had been good, and I was a safe diver, but I was looking for more.
There was a gap between where I was, and where I wanted to be.
I read magazine articles about amazing wreck diving projects—things that really excited me. But I could not see how I could get to those projects. I tried different training courses and talking to people on the projects, but none of that made it possible for me to participate. It was probably because project managers don’t want unknown divers on their team. New members can be a risk. As somebody that now runs my own projects, I completely understand that mentality. I started to look for training that was delivered by active exploration divers and was designed to develop a project diver. That’s when I found Global Underwater Explorers (GUE). GUE had divers that participated and contributed to projects around the world. They were active all over the world. When I heard that GUE had a training program, I had to look into it.
To start training with GUE one must first take what is called a Fundamentals course. This course introduces already certified divers to the GUE configuration and GUE methods, and it makes sure that their basic skills are at the level needed to continue training.
Breaking Down Fundamentals
The most important component in any diving class is the diving. A GUE Fundamentals or “Fundies” class is the starting place for all of GUE’s technical diving courses and comprises at least six dives designed to challenge and refine your skills. It starts with a surprising element.
Proper neutral buoyancy and trim are the foundation of this course and the first thing the instructor will focus on. Most divers think they will have no trouble with this, but try it on your next dive. Get neutral and horizontal and then see if you can remain perfectly stationary. Do you track forwards, wave your hands, or have some other unwanted movement? GUE helps to teach the skills necessary to be able to achieve this.

Propulsion techniques for greater efficiency and preserving visibility are the next skill the course focuses on, with advice to improve whatever your level currently is. Instructors often use video of your dives to help you see your progress. So whether you have had 20 dives or over 100, you will get something out of this.
Dive two works on precision and control—the backwards kick, and how to adjust your position using the helicopter turn. This makes interacting with your team easier and enables stability for shooting photos, collecting samples, or making observations during a project easier. Without this precision, simple tasks take longer or can impact the environment and sometimes even your safety. Next, you’ll be ready to begin challenging your new stability. Regulator removals, exchanges, and mask clearing are part of this, but now you will be expected to do them while neutrally buoyant, in trim, and holding position relative to your team.
Dives three and four introduce the valve drill and the s-drill. These skills work on important safety elements such as gas sharing and manipulation of cylinder valves, and they provide a perfect way to develop your new buoyancy, trim, and positioning capability while task loaded.

Dives five and six introduce the surface marker buoy as a communication tool between the diver and the surface, and of course controlling an ascent while using one. Managing an unconscious diver, a no-mask swim in touch contact with your team, plus any skills that need more refinement to complete the class are also done during dives five and six.
There are classroom sessions designed to explain gas management, nitrox, and decompression strategies for recreational diving. There are field drills for practicing the elusive backwards and helicopter kicks, as well as sequence and team-based skills like valve drills and s-drills. Field drills allow you to learn the steps of a skill without the complication of being underwater. You get instant feedback, making your performance in the water significantly higher.
It’s a packed few days by any standard, but your instructor will support you all the way, giving you honest feedback combined with realistic suggestions for you to improve. “Go away and practice more” without explaining exactly what you need to change, and why, is not acceptable feedback.
Even if you’re a rebreather or sidemount diver, the GUE Fundamentals class will still make you a better diver. You can take the class in either a single or doubles backmount configuration. The course can be taken in one or two parts depending on the students’ preference. Now, let’s address some common misconceptions about the GUE course.
Elisha Gibson a NSS-CDS Basic Cave Instructor intern who recently earned a GUE Fundamentals technical passed said this about her motivations for taking Fundamentals:
“The appeal of GUE is that no matter where you are in the world, you can meet a dive buddy and both be ready to dive in the same configuration with the same set of rules. This undoubtedly makes the dive safer and less complicated.”
She took the Fundamentals class, GUE’s most popular course. It’s a four-day event, but your instructor can deliver it in two parts if prefered.
If you’re thinking there’s nothing new I can learn from this class…
“I wasn’t sure what to expect. My previous training had left me thinking that all I had to do was complete the tasks, and I would pass. With GUE, I found that there was always an improvement I could make on every skill. Every dive was an opportunity to improve. All of my debriefs included specific solutions for improving, not just ‘go away and practice.’ I discovered that whatever my starting level was, there was always a way to get better.
Other divers started to comment about how comfortable I looked in the water. They would ask me how I could make such controlled ascents. They said that diving became more comfortable, safe, and enjoyable when they dived with me.”
This constant improvement can only be delivered with high attention to detail, and by an instructor that has an intimate knowledge of the mechanics of scuba diving. They must know how to provide solutions that are understandable and easy for the student to digest

For an experienced diver, it might seem that taking a step back to look at some very basic skills like buoyancy and trim would be unnecessary. Surely you would expect a technical diver or instructor to perform any skill whilst maintaining their position in the water, wouldn’t you? Sadly, that isn’t always the case. Sometimes it’s worthwhile to go back to basics and have a closer look at the things you think you know.
“After about a year of exclusively backmount diving, I still felt there was room for improvement in my skill set and comfort level. The GUE Fundamentals class seemed a logical choice,” Gibson said.
GUE divers think they’re better than everyone else.
Some say that GUE divers are elitist and consider themselves better than other divers. It’s easy to understand how that perception would exist. GUE divers often try to explain how we dive, as well as why we don’t do certain things that are common within the sport. Sometimes this comes across wrong.
“I never felt any elitism or superiority from any of the GUE members. The one thing I have noticed is a humble and simple approach to excellence,” said Luke Inman, who is a photographer/filmmaker and PADI course director explained. Inman recently took a GUE Fundamentals course.
Much of this perception of superiority comes from internet exchanges, which mask the true tone of a conversation. It’s always better to communicate in person!
“What finally pushed me to sign up for the class was the people. I have had the opportunity to dive with quite a few GUE trained divers over the past several years and they have all been exceptional buddies and divers,” Gibson said.
But I only dive sidemount or rebreather. Why should I take a “basic skills course”?
Many divers hesitate to consider GUE because they dive sidemount or rebreather. To focus only on the equipment is a mistake. One should focus on the skills. According to Gibson,
“The main reason I did not take Fundamentals earlier in my diving career is that most of my diving has been in sidemount, and Fundamentals is simply not taught in that configuration!”
The basics of buoyancy, trim, and propulsion are universal—even with a rebreather! The GUE approach to teamwork is universal. The simple and logical approach to emergency procedures can also be mapped back to any other configuration. For an experienced diver, learning GUE procedures would be a highly useful exercise.
“GUE shows how something sophisticated in theory can be simple in application,” Inman said.
It’s a cult. They will fill my head with nonsense.
Believe it or not, people hear that GUE teaches dangerous practices, removes your ability to think independently, and turns you into a robot. Sadly, the individuals passing along these rumors have rarely taken any training with GUE.
“Some of my best dive buddies had taken the class long after starting cave training and said it was challenging and beneficial to their diving level,” Gibson said.
A GUE instructor will take pride in explaining the logic and reason behind every piece of advice that they give. There is no “Kool-Aid” in a GUE course. GUE instructors present information, logic, and solutions.
My experience is not recognized!
If you’ve done a thousand dives in a range of environments, then you’re probably skeptical of training that goes right back to basics. You want something that will bring you forward in your diving, right? As Gibson explained,
“I felt as if my basic trim and buoyancy were not as good as when I first started my cave training. What better way to get this reset and return to the fundamentals of diving than with this class that is literally titled Fundamentals?”

This is one of the big differences between GUE and other systems. GUE instructors are not trying to tick a “required skills” checklist before certification. They are always trying to help a student improve, whatever their level. That doesn’t mean you’re going to get an advanced CCR cave class on your first morning of a GUE class, but it does mean that you will get coaching and feedback to improve your performance. In short, GUE training will make you a better diver, wherever you start. According to Inman,
“After 18 years teaching technical diving, the GUE valve shutdown is the perfect example of simplifying something others have complicated.”
When I went to Florida for my first cave class, I chose GUE for two reasons. Firstly, I’d experienced a range of instructors and wondered if this would be different. I was an instructor with several organizations and was curious to see their approach. Secondly, I’d researched my instructor and decided that his background in exploration would mean that I would gain knowledge from an active explorer, which is what I had been searching for.
By the end of the class, my world had changed forever.
I stopped teaching technical diving until I could dive like my GUE instructor. A year later, I started GUE instructor training, and the rest is history. I’m now a full-time instructor, only delivering the GUE curriculum.
My story is not unique. Luke Inman, whose quotes have been sprinkled through this article, has recently decided to become a GUE instructor.
“I remember taking a Full Cave course in Mexico and noticing that the GUE classes had a simple and distinct difference from the other agency’s courses. It is far more difficult to identify a GUE instructor and differentiate them from their students. Simply because the student standard is so high. The excellence shines through,” he said.
Before people have passed through their GUE training, they look at diving in a different way. They often have some very common worries when starting out.
“I worry that I might blow off some stops if I lose control of an ascent.”
“I don’t want to be worrying about buoyancy and trim when unknown or unexpected things happen.”
But after the class, these worries turn into an appreciation of the GUE system.
“It’s reassuring to know that everyone is on the same page. Everyone has the same working plan.”
From the least experienced diver to seasoned professionals, divers taking GUE training talk about real improvements in their comfort and capacity. Many of these divers join projects around the world. They bridge that gap between reading about exciting and important diving projects and being an active part of the story!

If you’re open to learning new skills, want to find out about GUE for yourself, or are ready to get started on your route to project diving, then talk to your nearest GUE instructor. They’ll meet with you for a chat and give you some honest advice. If you talk to me, I’ll get in the water with you for a quick dive, no strings attached, and show you what it’s all about. I know most GUE instructors will offer this service too.
What have you got to lose?
Nothing!
What have you got to gain?
It depends on where you want to be diving a year from now!
To find a GUE Instructor near you.

Rich Walker learned to dive in 1991 in the English Channel and soon developed a love for wreck diving. The UK coastline has tens of thousands of wrecks to explore, from shallow through to deep technical dives. He became aware of GUE in the late 1990’s as his diving progressed more into the technical realm, and he eventually took cave training with GUE in 2003. His path was then set, and he began teaching for GUE in 2004.
He is an active project diver, and is currently involved with:
Mars project, Sweden; Cave exploration team in Izvor Licanke, Croatia.; Ghost Fishing UK, Chairman and founder.
He is a fulltime technical instructor and instructor evaluator with GUE, which he delivers via his company Wreck and Cave Ltd. He sits on the BoD of GUE and several other industry bodies.
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Twenty-five Years in the Pursuit of Excellence – The Evolution and Future of GUE
Founder and president Jarrod Jablonski describes his more than a quarter of a century long quest to promote excellence in technical diving.

by Jarrod Jablonski. Images courtesy of J. Jablonski and GUE unless noted.
The most difficult challenges we confront in our lives are the most formative and are instrumental in shaping the person we become. When I founded Global Underwater Explorers (GUE), the younger version of myself could not have foreseen all the challenges I would face, but equally true is that he would not have known the joy, the cherished relationships, the sense of purpose, the rich adventures, the humbling expressions of appreciation from those impacted, or the satisfaction of seeing the organization evolve and reshape our industry. Many kindred souls and extraordinary events have shaped these last 25 years, and an annotated chronology of GUE is included in this issue of InDEPTH. This timeline, however, will fail to capture the heart behind the creation of GUE, it will miss the passionate determination currently directing GUE, or the committed dedication ready to guide the next 25 years.

I don’t remember a time that I was not in, around, and under the water. Having learned to swim before I could walk, my mother helped infuse a deep connection to the aquatic world. I was scuba certified in South Florida with my father, and promptly took all our gear to North Florida where I became a dive instructor at the University of Florida. It was then that I began my infatuation with cave diving. I was in the perfect place for it, and my insatiable curiosity was multiplied while exploring new environments. I found myself with a strong desire to visit unique and hard-to-reach places, be they far inside a cave or deep within the ocean.
My enthusiasm for learning was pressed into service as an educator, and I became enamored with sharing these special environments. Along with this desire to share the beauty and uniqueness of underwater caves was a focused wish to assist people in acquiring the skills I could see they needed to support their personal diving goals. It could be said that these early experiences were the seeds that would germinate, grow, mature, and bloom into the organizing principles for GUE.



The Pre-GUE Years
Before jumping into the formational days of GUE, allow me to help you visualize the environment that was the incubator for the idea that became GUE’s reality. By the mid-1990s, I was deeply involved in a variety of exploration activities and had been striving to refine my own teaching capacity alongside this growing obsession for exploratory diving. While teaching my open water students, I was in the habit of practicing to refine my own trim and buoyancy, noticing that the students quickly progressed and were mostly able to copy my position in the water. Rather than jump immediately into the skills that were prescribed, I started to take more time to refine their comfort and general competency. This subtle shift made a world of difference in the training outcomes, creating impressive divers with only slightly more time and a shift in focus. In fact, the local dive boats would often stare in disbelief when told these divers were freshly certified, saying they looked better than most open water instructors!
By this point in my career, I could see the problems I was confronting were more systemic and less individualistic. In retrospect, it seemed obvious that key principles had been missing in both my recreational and technical education, not to mention the instructor training I received. The lack of basic skill refinement seemed to occur at all levels of training, from the beginner to the advanced diver. Core skills like buoyancy or in-water control were mainly left for divers to figure out on their own and almost nobody had a meaningful emphasis on efficient movement in the water. It was nearly unheard of to fail people in scuba diving, and even delaying certification for people with weak skills was very unusual. This remains all too common to this day, but I believe GUE has shifted the focus in important ways, encouraging people to think of certification more as a process and less as a right granted to them because they paid for training.

The weakness in skill refinement during dive training was further amplified by little-to-no training in how to handle problems when they developed while diving, as they always do. In those days, even technical/cave training had very little in the way of realistic training in problem resolution. The rare practice of failures was deeply disconnected from reality. For example, there was almost no realistic scenario training for things like a failed regulator or light. What little practice there was wasn’t integrated into the actual dive and seemed largely useless in preparing for real problems. I began testing some of my students with mock equipment failures, and I was shocked at how poorly even the best students performed. They were able to quickly develop the needed skills, but seeing how badly most handled their first attempts left me troubled about the response of most certified divers should they experience problems while diving, as they inevitably would.
Diving Fatalities
Meanwhile, I was surrounded by a continual progression of diving fatalities, and most appeared entirely preventable. The loss of dear friends and close associates had a deep impact on my view of dive training and especially on the procedures being emphasized at that time within the community. The industry, in those early days, was wholly focused on deep air and solo diving. However, alarmingly lacking were clear bottle marking or gas switching protocols. It seemed to me to be no coincidence that diver after diver lost their lives simply because they breathed the wrong bottle at depth. Many others died mysteriously during solo dives or while deep diving with air.
One of the more impactful fatalities was Bob McGuire, who was a drill sergeant, friend, and occasional dive buddy. He was normally very careful and focused. One day a small problem with one regulator caused him to switch regulators before getting in the water. He was using a system that used color-coded regulators to identify the gas breathed. When switching the broken regulator, he either did not remember or did not have an appropriately colored regulator. This small mistake cost him his life. I clearly remember turning that one around in my head quite a bit. Something that trivial should not result in the loss of a life.
Also disturbing was the double fatality of good friends, Chris and Chrissy Rouse, who lost their lives while diving a German U-boat in 70 m/230 ft of water off the coast of New Jersey. I remember, as if the conversation with Chris were yesterday, asking him not to use air and even offering to support the cost as a counter to his argument about the cost of helium. And the tragedies continued: The loss of one of my closest friends Sherwood Schille, the death of my friend Steve Berman who lived next to me and with whom I had dived hundreds of times, the shock of losing pioneering explorer Sheck Exley, the regular stream of tech divers, and the half dozen body recoveries I made over only a couple years, which not only saddened me greatly, but also made me angry. Clearly, a radically different approach was needed.
Learning to Explore
Meanwhile, my own exploration activities were expanding rapidly. Our teams were seeking every opportunity to grow their capability while reducing unnecessary risk. To that end, we ceased deep air diving and instituted a series of common protocols with standardized equipment configurations, both of which showed great promise in expanding safety, efficiency, and comfort. We got a lot of things wrong and experienced enough near misses to keep us sharp and in search of continual improvement.

But we looked carefully at every aspect of our diving, seeking ways to advance safety, efficiency, and all-around competency while focusing plenty of attention into the uncommon practice of large-scale, team diving, utilizing setup dives, safety divers, and inwater support. We developed diver propulsion vehicle (DPV) towing techniques, which is something that had not been done previously. We mostly ignored and then rewrote CNS oxygen toxicity calculations, developed novel strategies for calculating decompression time, and created and refined standard procedures for everything from bottle switching to equipment configurations. Many of these developments arose from simple necessity. There were no available decompression programs and no decompression tables available for the dives we were doing. Commonly used calculations designed to reduce the risk of oxygen toxicity were useless to our teams, because even our more casual dives were 10, 20, or even 30 times the allowable limit. The industry today takes most of this for granted, but in the early days of technical diving, we had very few tools, save a deep motivation to go where no one had gone before.

Many of these adventures included friends in the Woodville Karst Plain Project (WKPP), where I refined policies within the team and most directly with longtime dive buddy George Irvine. This “Doing it Right” (DIR) approach sought to create a more expansive system than Hogarthian diving, which itself had been born in the early years of the WKPP and was named after William Hogarth Main, a friend and frequent dive buddy of the time. By this point, I had been writing about and expanding upon Hogarthian diving for many years. More and more of the ideas we wanted to develop were not Bill Main’s priorities and lumping them into his namesake became impractical, especially given all the debate within the community over what was and was not Hogarthian.
A similar move from DIR occurred some years later when GUE stepped away from the circular debates that sought to explain DIR and embraced a GUE configuration with standard protocols, something entirely within our scope to define.
These accumulating events reached critical mass in 1998. I had experienced strong resistance to any form of standardization, even having been asked to join a special meeting of the board of directors (BOD) for a prominent cave diving agency. Their intention was to discourage me from using any form of standard configuration, claiming that students should be allowed to do whatever they “felt’ was best. It was disconcerting for me, as a young instructor, to be challenged by pioneers in the sport; nevertheless, I couldn’t agree with the edict that someone who was doing something for the first time should be tasked with determining how it should be done.
This sort of discussion was common, but the final straw occurred when I was approached by the head of a technical diving agency, an organization for which I had taught for many years. I was informed that he considered it a violation of standards not to teach air to a depth of at least 57 m/190 ft. This same individual told me that I had to stop using MOD bottle markings and fall in line with the other practices endorsed by his agency. Push had finally come to shove, and I set out to legitimize the training methods and dive protocols that had been incubating in my mind and refined with our teams over the previous decade. Years of trial and many errors while operating in dynamic and challenging environments were helping us to identify what practices were most successful in support of excellence, safety, and enjoyment.
Forming GUE
Forming GUE as a non-profit company was intended to neutralize the profit motivations that appeared to plague other agencies. We hoped to remove the incentive to train—and certify—the greatest number of divers as quickly as possible because it seemed at odds with ensuring comfortable and capable divers. The absence of a profit motive complemented the aspirational plans that longtime friend Todd Kincaid and I had dreamed of. We imagined a global organization that would facilitate the efforts of underwater explorers while supporting scientific research and conservation initiatives.
I hoped to create an agency that placed most of the revenue in the hands of fully engaged and enthusiastic instructors, allowing them the chance to earn a good living and become professionals who might stay within the industry over many years. Of course, that required forgoing the personal benefit of ownership and reduced the revenue available to the agency, braking its growth and complicating expansion plans. This not only slowed growth but provided huge challenges in developing a proper support network while creating the agency I envisioned. There were years of stressful days and nights because of the need to forgo compensation and the deep dependance upon generous volunteers who had to fit GUE into their busy lives. If it were not for these individuals and our loyal members, we would likely never have been successful. Volunteer support and GUE membership have been and remain critical to the growing success of our agency. If you are now or have ever been a volunteer or GUE member, your contribution is a significant part of our success, and we thank you.

The challenges of the early years gave way to steady progress—always slower than desired, with ups and downs, but progress, nonetheless. Some challenges were not obvious at the outset. For example, many regions around the world were very poorly developed in technical diving. Agencies intent on growth seemed to ignore that problem, choosing whoever was available, and regardless of their experience in the discipline, they would soon be teaching.
This decision to promote people with limited experience became especially problematic when it came to Instructor Trainers. People with almost no experience in something like trimix diving were qualifying trimix instructors. Watching this play out in agency after agency, and on continent after continent, was a troubling affair. Conversely, it took many years for GUE to develop and train people of appropriate experience, especially when looking to critical roles, including high-level tech and instructor trainers. At the same time, GUE’s efforts shaped the industry in no small fashion as agencies began to model their programs after GUE’s training protocols. Initially, having insisted that nobody would take something like Fundamentals, every agency followed suit in developing their own version of these programs, usually taught by divers that had followed GUE training.
This evolving trend wasn’t without complexity but was largely a positive outcome. Agencies soon focused on fundamental skills, incorporated some form of problem-resolution training, adhered to GUE bottle and gas switching protocols, reduced insistence on deep air, and started talking more about developing skilled divers, among other changes. This evolution was significant when compared to the days of arguing about why a person could not learn to use trimix until they were good while diving deep on air.
To be sure, a good share of these changes was more about maintaining business relevance than making substantive improvements. The changes themselves were often more style than substance, lacking objective performance standards and the appropriate retraining of instructors. Despite these weaknesses, they remain positive developments. Talking about something is an important first step and, in all cases, it makes room for strong instructors in any given agency to practice what is being preached. In fact, these evolving trends have allowed GUE to now push further in the effort to create skilled and experienced divers, enhancing our ability to run progressively more elaborate projects with increasingly more sophisticated outcomes.
The Future of GUE
The coming decades of GUE’s future appear very bright. Slow but steady growth has now placed the organization in a position to make wise investments, ensuring a vibrant and integrated approach. Meanwhile, evolving technology and a broad global base place GUE in a unique and formidable position. Key structural and personnel adjustments complement a growing range of virtual tools, enabling our diverse communities and representatives to collaborate and advance projects in a way that, prior to now, was not possible. Strong local communities can be easily connected with coordinated global missions; these activities include ever-more- sophisticated underwater initiatives as well as structural changes within the GUE ecosystem. One such forward-thinking project leverages AI-enabled, adaptive learning platforms to enhance both the quality and efficiency of GUE education. Most agencies, including GUE, have been using some form of online training for years, but GUE is taking big steps to reinvent the quality and efficiency of this form of training. This is not to replace, but rather to extend and augment inwater and in-person learning outcomes. Related tools further improve the fluidity, allowing GUE to seamlessly connect previously distant communities, enabling technology, training, and passion to notably expand our ability to realize our broad, global mission.

Meanwhile, GUE and its range of global communities are utilizing evolving technologies to significantly expand the quality and scope of their project initiatives. Comparing the impressive capability of current GUE communities with those of our early years shows a radical and important shift, allowing results equal or even well beyond those possible when compared even with well-funded commercial projects. Coupled with GUE training and procedural support, these ongoing augmentations place our communities at the forefront of underwater research and conservation. This situation will only expand and be further enriched with the use of evolving technology and closely linked communities. Recent and planned expansions to our training programs present a host of important tools that will continue being refined in the years to come. Efforts to expand and improve upon the support provided to GUE projects with technology, people, and resources are now coming online and will undoubtedly be an important part of our evolving future.
The coming decades will undoubtedly present challenges. But I have no doubt that together we will not only overcome those obstacles but we will continue to thrive. I believe that GUE’s trajectory remains overwhelmingly positive, for we are an organization that is continually evolving—driven by a spirit of adventure, encouraged by your heartwarming stories, and inspired by the satisfaction of overcoming complex problems. Twenty-five years ago, when I took the path less traveled, the vision I had for GUE was admittedly ambitious. The reality, however, has exceeded anything I could have imagined. I know that GUE will never reach a point when it is complete but that it will be an exciting lifelong journey, one that, for me, will define a life well lived. I look forward our mutual ongoing “Quest for Excellence.”
See Listings Below For Additional Resources On GUE And GUE Diving!

Jarrod is an avid explorer, researcher, author, and instructor who teaches and dives in oceans and caves around the world. Trained as a geologist, Jarrod is the founder and president of GUE and CEO of Halcyon and Extreme Exposure while remaining active in conservation, exploration, and filming projects worldwide. His explorations regularly place him in the most remote locations in the world, including numerous world record cave dives with total immersions near 30 hours. Jarrod is also an author with dozens of publications, including three books.
A Few GUE Fundamentals
Similar to military, commercial and public safety divers, Global Underwater Explorers (GUE) is a standards-based diving community, with specific protocols, standard operating procedures (SOPs) and tools. Here are selected InDEPTH stories on some of the key aspects of GUE diving, including a four-part series on the history and development of GUE decompression procedures by founder and president Jarod Jablonski.

Anatomy of a Fundamentals Class
GUE Instructor Examiner Guy Shockey explains the thought and details that goes into GUE’s most popular course, Fundamentals, aka “Fundies,” which has been taken by numerous industry luminaries. Why all the fanfare? Shockey characterizes the magic as “simple things done precisely!

Back to Fundamentals: An Introduction to GUE’s Most Popular Diving Course
Instructor evaluator Rich Walker attempts to answer the question, “why is Fundamentals GUE’s most popular diving course?” Along the way, he clarifies some of the myths and misconceptions about GUE training. Hint: there is no Kool-Aid.

As you’d expect, Global Underwater Explorers (GUE) has a standardized approach to prepare your equipment for the dive, and its own pre-dive checklist: the GUE EDGE. Here explorer and filmmaker Dimitris Fifis preps you to take the plunge, GUE-style.

The Flexibility of Standard Operating Procedures
Instructor trainer Guy Shockey discusses the purpose, value, and yes, flexibility of standard operating procedures, or SOPs, in diving. Sound like an oxymoron? Shockey explains how SOPs can help offload some of our internal processing and situational awareness, so we can focus on the important part of the dive—having FUN!

Standard Gases: The Simplicity of Everyone Singing the Same Song
Like the military and commercial diving communities before them, Global Underwater Explorers (GUE) uses standardized breathing mixtures for various depth ranges and for decompression. Here British wrecker and instructor evaluator Rich Walker gets lyrical and presents the reasoning behind standard mixes and their advantages, compared with a “best mix” approach. Don’t worry, you won’t need your hymnal, though Walker may have you singing some blues.

Rules of Thumb: The Mysteries of Ratio Deco Revealed
Is it a secret algorithm developed by the WKPP to get you out of the water faster sans DCI, or an unsubstantiated decompression speculation promoted by Kool-Aid swilling quacks and charlatans? British tech instructor/instructor evaluator Rich Walker divulges the arcane mysteries behind GUE’s ratio decompression protocols in this first of a two part series.

The Thought Process Behind GUE’s CCR Configuration
Global Underwater Explorers is known for taking its own holistic approach to gear configuration. Here GUE board member and Instructor Trainer Richard Lundgren explains the reasoning behind its unique closed-circuit rebreather configuration. It’s all about the gas!

GUE and the Future of Open Circuit Tech Diving
Though they were late to the party, Global Underwater Explorers (GUE) is leaning forward on rebreathers, and members are following suit. So what’s to become of their open circuit-based TECH 2 course? InDepth’s Ashley Stewart has the deets.

Diving projects, or expeditions—think Bill Stone’s Wakulla Springs 1987 project, or the original explorations of the Woodville Karst Plain’s Project (WKPP)—helped give birth to technical diving, and today continue as an important focal point and organizing principle for communities like Global Underwater Explorers (GUE). The organization this year unveiled a new Project Diver program, intended to elevate “community-led project dives to an entirely new level of sophistication.” Here, authors Guy Shockey and Francesco Cameli discuss the power of projects and take us behind the scenes of the new program

Decompression, Deep Stops and the Pursuit of Precision in a Complex World In this first of a four-part series, Global Underwater Explorers’ (GUE) founder and president Jarrod Jablonski explores the historical development of GUE decompression protocols, with a focus on technical diving and the evolving trends in decompression research.