News
Oyster Diving’s PADI Specialty Of The Month: Enriched Air (Nitrox)
There are a several specialties that I believe are almost essential in an experienced diver’s locker; deep diver which qualifies you to dive down to 40m, dry suit if you live in colder climes, and Nitrox.
Enriched Air, more commonly referred to as Nitrox, is where the scuba tank on your bank carries a higher percentage of Oxygen then regular air. For recreational divers this can be between 22-40% O2, however many dive centres offer a standard blend of either 32% or 36% Oxygen.
The reason why we increase the percentage of O2 in the cylinder is that it reduces the amount of Nitrogen, and if you recall from your open water course, too much Nitrogen is a bad thing for divers and can lead to decompression sickness i.e. nitrogen bubbles form in your body that can restrict the flow of oxygen to your brain and other vital organs. This is more commonly referred to as ‘the bends’ and if untreated can be a life-threatening condition.
So by diving on Nitrox it means that we can spend longer underwater as we are absorbing less Nitrogen. For example, under the PADI dive tables you can spend 20 minutes at 30m if diving on normal air which has approximately 21% oxygen. If you were to do the same dive with an oxygen content of 32% then you could spend 30 minutes underwater i.e. 50% longer. If you’ve just paid £100’s or even £1000’s on your annual diving holiday then it makes sense to spend as much time as possible underwater.
There are some potential risks if you are not properly trained. As we descend, the partial pressure of Oxygen increases. At 10m there is the equivalent of 2 atmospheres of pressure; this means that if you had a blend of 32% oxygen then it would be the equivalent to breathing air with a 64% O2 content, or a partial pressure of 0.64.
If the concentration of Oxygen in your system is too high it can lead to convulsions, which in turn can lead to drowning. So as part of the Nitrox course you’ll learn that you don’t exceed a partial pressure of 1.4 O2 content, or 1.6 in an emergency. Likewise if your exposure to oxygen is over a certain amount of time then a similar fate could await you, so you’ll learn about equivalent air depths and exposure.
The PADI Enriched Air course teaches you how to calculate your bottom time, exposure time limit to oxygen, how to analyse the oxygen contents of your cylinder and how to calculate your maximum operating depth. Dive computers make life even easier as all you need to do is analyse your tank and set the % of O2 in the settings. Your computer will then automatically calculate your maximum depths and your no decompression limits.
If you speak to people who dive regularly then you’ll often hear them say how Nitrox makes you feel a lot less tired at the end of each day and a feeling that it is generally better for you than constantly loading your system with Nitrogen.
Many dive centres around the world offer free Nitrox to their customers so it doesn’t have to break the bank either.
The Nitrox course is simple to complete and you don’t even need to get wet to get qualified!
Oyster Diving are offering 10% off the Nitrox course if you book before the end of June. To book simply click here and enter the code ‘specsaver’ to receive your 10% discount.
Discuss this article in the Scubaverse Forum.
News
Dive Worldwide Announces Bite-Back as its Charity of the Year
Over the next 12 months, specialist scuba holiday company Dive Worldwide will be supporting Bite-Back Shark & Marine Conservation with donations collected from client bookings to any one of its stunning dive destinations around the world. The independently-owned operator expects to raise £3000 for the UK charity.
Manager at Dive Worldwide, Phil North, said: “We’re especially excited to work with Bite-Back and support its intelligent, creative and results-driven campaigns to end the UK trade in shark products and prompt a change in attitudes to the ocean’s most maligned inhabitant.”
Bite-Back is running campaigns to hold the media to account on the way it reports shark news along with a brand new nationwide education programme. Last year the charity was credited for spearheading a UK ban on the import and export of shark fins.
Campaign director at Bite-Back, Graham Buckingham, said: “We’re enormously grateful to Dive Worldwide for choosing to support Bite-Back. The company’s commitment to conservation helps set it apart from other tour operators and we’re certain its clients admire and respect that policy. For us, the affiliation is huge and helps us look to the future with confidence we can deliver against key conservation programmes.”
To launch the fundraising initiative, Phil North presented Graham Buckingham with a cheque for £1,000.
Visit Dive Worldwide to discover its diverse range of international scuba adventures and visit Bite-Back to learn more about the charity’s campaigns.
MORE INFORMATION
Call Graham Buckingham on 07810 454 266 or email graham@bite-back.com
Gear News
Scubapro Free Octopus Promotion 2024
Free Octopus with every purchase of a SCUBAPRO regulator system
Just in time for the spring season, divers can save money with the FREE OCTOPUS SPRING PROMOTION! Until July 31st SCUBAPRO offers an Octopus for free
with every purchase of a regulator system!
Get a free S270 OCTOPUS with purchase of these combinations:
MK25 EVO or MK19 EVO with A700
MK25 EVO or MK19 EVO with S620Ti
MK25 EVO or MK19 EVO with D420
MK25 EVO Din mit S620Ti-X
Get a free R105 OCTOPUS with purchase of the following combinations:
MK25 EVO or MK19 EVO with G260
MK25 EVO or MK17 EVO with S600
SCUBAPRO offers a 30-year first owner warranty on all regulators, with a revision period of two years or 100 dives. All SCUBAPRO regulators are of course certified according to the new European test standard EN250-2014.
Available at participating SCUBAPRO dealers. Promotion may not be available in all regions. Find an authorized SCUBAPRO Dealer at scubapro.com.
More information available on www.scubapro.com.
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