Nitrox, also known as Enriched Air, is a breathing gas used for scuba diving. Normal air is composed of around 21% oxygen and 79% nitrogen. The oxygen is used by our body, but the nitrogen is not and so it builds up. It is the nitrogen (as well as the amount of gas left in your tank!) that limits your allowable time underwater (called the no-decompression limit or NDL). With Nitrox) there is a higher proportion of oxygen in the breathing gas, meaning a lower percentage of nitrogen. This allows for extended NDLs, i.e. longer time underwater (assuming you have gas remaining to breathe!). Nitrox is therefore extremely popular, and indeed to is PADI’s most popular specialty course, because it means you get more value from each dive. However, a little extra training is required because the higher levels of oxygen mean that depth limits sometimes need to be shallower. Divers using Nitrox need to learn how to analyze their mix, work out their maximum depth and manage their oxygen exposure according to the richness of the mix they are using. With computer use now integrated into the Nitrox course, this procedure is simpler than ever.
For 2011 Calypso has a special promotion for Nitrox fills and courses. And, as a Christmas present to our divers, we are overlapping the offer into December 2010 as well. Contact us to find out how to get complimentary Nitrox for Christmas and all the way through 2011!