Full Cave Navigation Protocols in Mexico

Guide line in Cenote Chac Mool, Yucatán Peninsula, Mexico. Photo by Larry Cohen.

I started cave diving in Italy in 1990. At that time, the rules were very clear, codified and related to the kind of caves that were encountered in my region. Very often, they were resurgences with current (sometimes strong) or sumps inside caves, with water ranging from crystal clear to the color of coffee and variable visibility, depending on the rains.

Getting Lined Up: Troubleshooting Sidemount Tank Configuration

A pair of divers wearing cleanly-configured sidemount kit. Cave photo by S.J. Alice Bennet.

I like sidemount. I will frequent­ly, jokingly, disparage the configuration, but I do like it. It can be comfortable and streamlined. It can be very flexible. There is an argument to be made for completely isolated redundancy. Mostly, it is good for moving through places no bigger than the space below your coffee table.

Going Through the Paces of GUE’s CCR1 Course

Adam Hanlon pic
The GUE JJ CCR setup provides a swift and efficient bailout option. If equipped with a BOV, a twist gives access to 14 litres of back gas. This provides plenty of time to make crucial decisions and to figure out what to do next!

I completed a Module 1 course on the Inspiration Classic back in the late ‘90s but found that my limited ability meant that maintaining situational awareness while also having to continually monitor handsets was very difficult. In the early 2000s, I also did a series of technical diving courses with Global Underwater Explorers (GUE), and I still rate these lessons as the most significant dive training that I have ever undertaken.

How Much is Your Life Worth?

If a fast-track technical diving course was too short, could it mean that the training in general was compromised, or worse still, without the student even being aware of it? Photo by Laurent Miroult.

There was a time, when “time” meant something very different than it does today. In the past, dive courses needed student commitment, were expensive, and yes, essentially, needed more time.

Sidemount Tanks: Getting Them to Behave Themselves & Sit Where They Should

One of the least mysterious things about sidemount diving is how to rig a set of steel primary cylinders so they hang at diver’s sides as they are supposed to, rather than hanging pendulum-like below them. However, some still struggle to get it anywhere close to right. Perhaps this article will help.

Scubatlon: Environmental Protection as a Sport

Over the last half century, scuba diving—which was, in its earlier days, reserved for the elite, brave and courageous—has become a mainstream sport for the masses. On the one hand, this is very good. Millions of people get to see with their own eyes how diverse and exciting the underwater world is. On the other hand, diving can cause serious damage to coral reefs, which are rich in biodiversity, but extremely vulnerable to human impact.

Permanent Change: When Have We Learnt?

In a previous article, I discussed some of the various definitions of learning, and focused on the following definition: Learning is a permanent, observable change in behaviour. Specifically, the article explored the second part of the definition and the learning outcomes that can be used to pin down the observable change in behaviour, which we are looking for.