TDI Basic Nitrox       This one day entry level course is available to all divers who wish to explore the many advantages of Nitrox diving and begin to expand their horizons. The qualification allows the diver the use of Nitrox from 22% to 40%. The one day course covers the history of Nitrox, its advantages, and disadvantages, oxygen toxicity, equivalent air depths, maximum operating depths, nitrox computers and gas analysis. We provide manuals etc., no dives are involved unless you request them and all that is required by you is a calculator and some common sense. Pre-requisites: Open water diver or equivalent minimum 15 years of age.