BLOG: What I wanted to say…
Gradient factors and DAN’s DSSG
What is the DAN DSSG? While most divers discuss gradient factors as a measure of supersaturation, DAN has come up with its own metric…
Divers vs. Profiles: The New DAN DB Analysis
An analysis of many dive profiles – but some divers contributed only single dives, while others contributed hundreds, even over a thousand. In this post, we explain why it’s incorrect to consider these dives as completely independent.
Statistics is hard to get right
In early 2026, a new analysis of the DAN database was published. We discuss obvious issues with how the data were collected.
Altitude after diving
Is it dangerous to drive uphill after diving? Usually not—but it does depend a bit on the dive…
How common is DCS?
Diving isn’t any more dangerous than other sports. You can see that, among other things, in the incidence of DCS: Only very few dives end in this “diver’s disease.” But how high is the risk really?
DCS: Risk Factors
DCS is rare—but when someone experiences symptoms after diving, people often ask what caused it. Very little is known about this. A few risk factors can be clearly identified, but most of it remains guesswork.
Measuring bubbles
Measuring bubbles after diving: Can it be useful? Bubbles are an unreliable individual indicator of Deco stress, but as part of a larger dataset, they can provide valuable insights.
Emergency ascents in diving training
Running out of air underwater is a horror scenario. That’s why you practice emergency ascents – but what should you focus on? What is really important to prevent accidents from happening in the first place?
PRO Discussion: Specialty Courses
Specialties in Diving: Rip-off, Card Sales, or Meaningful Further Education?You can arrange your entire diving life so that you never just go diving, but complete one course after another. Boat diving. An SMB specialty. An ecology specialty per fish species. An extra...
Which GF settings are the best?
Setting Gradient Factors on a Dive Computer: How to decide which GFs to use when diving?
Demonstrating Skills
What does “demonstration quality” mean for diving skills? When should you master OWD skills to demonstration quality? And what’s the best way to practice?
New recommendation for oxygen limits
A NOAA workshop has developed new guidelines for oxygen exposure times. A consensus was reached on a pO₂ of 1.3 bar.
How deep can you dive?
Whether on Facebook, in forums, when checking in at the dive center or at the regulars' table, the question of who is actually allowed to dive how deep is a recurring theme among divers.Who allows you to dive? In principle, no one is forbidden to dive, and so anyone...
Oxygen and DCS
Oxygen as First Aid for DCS: Why it is so important to administer oxygen even with the slightest suspicion and how exactly it works against DCS symptoms.
How do I determine my SAC rate?
Don't we all know the question of how long a scuba tank lasts? We usually answer with a casual "It depends..." and have the depth and our breathing in mind. And quite rightly so: these are precisely the two things we need to knoe in order to be able to calculate our...
Read studies
Scientific studies are often bulky – and yet you can understand a lot, even without having studied the subject. We provide a short guide to reading scientific studies using an example from Deco research.
Hovering or kneeling?
Why I prefer to let my diving students take off early The question of whether diving students should kneel or float at the beginning is a constant source of debate - and not just among instructors. Over the years, I have seen many approaches, tried them out and...
Buddy Check
The sun is hot, you're all worked up - fiddling with each other again? Better not.But you should still do a buddy check. Buddy check when diving - essential, not just theoryThe buddy check, or more generally: the safety check in the team before the dive, is actually a...
For the few minutes on the outer reef….
When the deep calls: For many divers, the depths hold a very special fascination. But what is necessary to be able to dive safely and sensibly beyond recreational limits?
Become a Divemaster: Pay for the course in cash or in labor?
The business with dreamsSun, beach, diving - even as beginners, many begin to dream of doing this as a profession. Or at least for a few years... Traveling, making money all over the world, doing exactly what you love to do most anyway - irresistible.The reality is...
Where are the best dive sites in the Canary Islands?
Atlantic? Diving? Really?Always experiencing something new, exploring dive sites that surprise you, and still doing so after hundreds and thousands of dives - that is, at least for me, the most important thing about our beloved hobby.Many divers love warm waters, with...
