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Tech Dive Articles

Obesity and Diving

by David Colvard, M.D.

Obesity is important in diving because of its relationship to fitness, the controversial risk of decompression illness, fit of wetsuit and weights, and coexisting diseases such as diabetes, hypertension and sleep apnea. So, how can the obese dive more safely? Let’s start with buoyancy and weight distribution.

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  • buoyancy obesity
  • obesity and scuba diving

Deep Stops

We all remember from our open water training that a stop at 10 to 20 feet for three to five minutes is recommended before surfacing from every dive. You may have read or heard about “deep stops” or Plyle stops”.



To Go Tech or Not? Part I

Things to consider before going tech!
by David Miner

Double tanks or rebreathers are used very often in technical diving

Technical diving is a rapidly growing type of diving. Over the last 10 or so years, technical diving has become more mainstream, training agencies have implemented multiple technical certifications, and the diving community has accepted it as an important, safe, and fun type of diving. Today, equipment manufacturers, diving trade shows, and training agencies all promote technical diving.

There are many things to consider before jumping into technical diving. In this two-part article, we’ll be covering some of the most important things to consider before deciding if technical diving is for you.

What type of technical diving are you interested in?

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What is DIR?

DIR is a holistic approach to your diving mentality, diving fitness level, gear configuration, and right attitude. DIR promotes a certain physical and mental readiness to dive by having the right attitude and fitness level to dive safely. DIR focuses on a buddy team approach, which provides redundancy for the most important piece of dive equipment, your brain. Without the proper mindset and attitude, you’re jeopardizing you and your buddy’s safety. A positive and solid mindset about diving and safety are the primary points of DIR. No matter how much training you have or how much great gear you own, it won’t help you or your buddy if you have an unsafe and reckless attitude. The mantra of DIR is “don’t dive with unsafe divers.”

Good buddy skills, a good attitude, quality diving skills, and fitness are some of the primary things DIR teaches. Learning these skills increases the safety of you and your buddy’s dive and makes the dive more fun and relaxing.

One of the big DIR teaching principles concerns your gear and how it’s configured. Gear configuration is based on a Hogarthian setup. Hogarthian gear configuration stems from William Hogarth Main, who has always worked on his gear setup to find the optimal setup that promotes safety, streamlining, reliability, and is easy to use. Hogarthian diving is the concept of taking only the gear you need on the dive and placing that gear in the same place every time no matter what kind of diving you’re doing. Placing the gear in the right place is also essential in the Hogarthian configuration. By placing the gear in the right place every time, your dive facilitates quick responses in an emergency situation. Plus, you and your buddy also know exactly where it is at all times. Consistency, proper placement, reliability, and a minimalist approach are the heart of DIR equipment configuration.

DIR embodies the principles of simplicity, functionality, minimalism, process, and reliability. These terms each define the backbone and basis of the DIR approach.

For more in depth articles about what DIR is go to:

The Tech Photographer

by Pete Nawrocky

Many of today’s divers are engaged in “technical” diving. Simply stated, “any dive in which a diver cannot surface immediately and directly to the surface, is performing a tech dive.” However, most of the time “tech” diving is looked upon as dives requiring gas mixtures other than air or dives that require decompression or entering overhead environments. It may be necessary to switch regulators underwater or work with computers that need to have gas changes accomplished during hang times. Carrying the extra load of double tanks and stage bottles causes even more drag. Now add a camera into the whole mix. Before you decide just to “grab and go” do not bring a camera into any situation that you have not encountered before, plan your dive carefully.
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