What is NITROX?
NITROX is any mixture of nitrogen and oxygen. The air we breathe is comprised of
approximately 21% oxygen and 79% nitrogen. NITROX mixtures with oxygen percentages
greater than 21% are called Enriched Air Nitrox (EANx). The most commonly used
EANx mixtures are:
EAN 32(32% oxygen/68% nitrogen)
EAN 36(36% oxygen/64% nitrogen)
Who uses NITROX?
EANx was first used in 1912 and has been used extensively for over 30 years in
commercial diving and the military. Advanced divers have been taking advantage of
EANx for cave diving, wreck diving, and other diving applications. Since 1985,
EANx has been recognized by national SCUBA certification agencies as an alternate
breathing gas for recreational diving.
Why should I dive NITROX?
EANx has many advantages over air. Some of these benefits are:
- Increased Safety
- EANx when used with standard dive tables or computers, provides a tremendous
safety factor. In fact, the actual nitrogen accumulation is that for a 10'-20'
shallower dive. The application of EANx is ideal for divers who wish to be more
conservative, those divers who are not as young as they once were, or those who may not
be in peak physical fitness.
- Significant increase in bottom time.
- A reduction of the possibility of decompression sickness.
- A slight reduction in nitrogen narcosis.
- A reduction of decompression time if the
no-decompression limits are exceeded.
- Reduced fatigue after the dive.
Do I need special equipment?
Your standard scuba gear can be used with EANx/NITROX. Tanks for NITROX use are color
coded and dedicated for nitrox use only. Any SCUBA tank can become a NITROX tank,
all that is required is a special cleaning.
What do I have to do to dive NITROX?
Getting certified for NITROX is simple. All you have to do is take a 3 hour classroom only
course. The EANx/NITROX course will teach you the proper use of the NITROX decompression
tables and how to determine the oxygen percentage in your tank. After passing the open-book
test you will be issued a TDI NITROX certification. The course is taught in one
session. The cost of the class is $150 and includes the textbook. The class can also be done as a take home course for $125.