TDI Diver News

If you were to be asked what does a decompression diver look like, what would the image be in your head? Would it be a diver with doubles on their back and cylinders hanging off every available D-ring? Would it … Continue reading »

By Bret C. Gilliam A HISTORICAL PERSPECTIVE There have been numerous articles written on the subjects of inert gas narcosis and attendant depth limitations. Many have re-hashed old formulas relating the preposterous “Martini’s Law” etc. and sanctimonious admonitions against any … Continue reading »

By Steve Lewis When the diving community attempts to set a definition for a technique, procedure or even a piece of kit… whoops, sorry I should say equipment… there is seldom complete agreement. Our community is simply too diverse, too … Continue reading »

It sounded like the perfect place to run a CCR Course. A tropical island, clear visibility, warm waters and calm seas. An instructors dream teaching location. However, for the guys who completed their TDI Hollis Prism 2 CCR Course on … Continue reading »

The benefits of diving nitrox have long been know, which is why today it is the breathing gas of choice for most divers. During all nitrox courses one of the biggest topics is elevated PO2 and why not to exceed … Continue reading »

Let’s review the methods used to plan a nitrox dive by focusing on table-based nitrox planning, related to nitrogen considerations. Nitrogen Limits and EAD Nitrogen exposures are omnipresent in diving, and must be carefully monitored for every dive. These exposures … Continue reading »

In addition to Central Nervous System (CNS) toxicity, technical divers must also be aware of pulmonary, sometimes called whole body, oxygen toxicity. Pulmonary toxicity is only of concern for very long exposures to oxygen (at least several hours). Most tech … Continue reading »

Divers may use the same graphic representation of the dive profile, now adding the nitrox mix and appropriate EAD information, to assist in the planning process. Example: Using EAN36 at a depth of 15 m / 50 ft, with a … Continue reading »

Nitrogen exposures are omnipresent in diving, and must be carefully monitored for every dive. These exposures are related to the risk of DCS (Decompression Sickness). In order to properly manage this risk, appropriate exposure limits have been identified for air … Continue reading »

EAD Tables To avoid the mathematical calculations, divers often rely upon published EAD tables; a very useful version of EAD tables is incorporated into the TDI-SDI combined nitrox tables, in both Metric and Imperial versions (depicted below). To determine an … Continue reading »