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Oyster Diving’s PADI Specialty Of The Month: Enriched Air (Nitrox)

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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.

Having worked as a Dive Instructor in the Virgin Islands, Thailand and Egypt, Mark returned to the UK in 2006 when he founded Oyster Diving. His principle aims for the new diving centre would be to appeal to the more discerning customer by offering the best facilities, having an integrated travel agency so customers can complete their dives abroad as well as in the UK. In 2010 Mark won Sport Diver magazines' 'Best Diving Instructor'. For more information on Oyster Diving, visit www.oysterdiving.com.

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Spooktacular Underwater Adventure: Oyster Diving’s First Halloween Scuba Party at Mercers Lake

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halloween

Last Thursday, Oyster Diving transformed Mercers Lake into a hauntingly unforgettable underwater realm for their inaugural Halloween Scuba Party. Approximately 20 intrepid divers plunged into the darkness, weaving through a mesmerising scene of spectral decorations, glow sticks, and eerie underwater pumpkins.

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After the thrilling night dive, participants gathered to feast on a ghoulish spread of pumpkin soup, chilli con carne, and decadent fudge brownies, perfect fuel for the frightful festivities.

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With a resounding success, Oyster Diving is excited to announce plans for this event to become an annual tradition. Next year, look forward to a fully licensed bar and live music, promising an even spookier celebration under the moonlit waters.

halloween

Join us next Halloween for an experience that promises to be a haunting delight!

Find out more about Oyster Diving at oysterdiving.com.

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Marine Life & Conservation

Shark Trust launches Oceanic 31 Shark Art Auction

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After a two-year tour of UK art galleries, community spaces and aquariums, the Shark Trust’s acclaimed Oceanic31 exhibition takes its final bow at the Royal Geographical Society later this month. And the unique collection of artwork, depicting 31 species of oceanic sharks and rays, donated by 31 artists, is now open for bids from art lovers and shark enthusiasts. The online auction, launched today, will close on the 7th December at 8pm (BST). The money raised will support the Shark Trust Oceanics Programme.

People can now bid on 27 of the artworks by visiting this website:

https://superstars-auctions.com/sharktrustauction

It is a chance to own a beautiful piece of original art and to support the Shark Trust. The timing of the auction also means that these would make a very special Christmas gift for any shark-lover.

The diversity of pieces mirrors that of the sharks and rays they represent. You can bid on paintings, digital creations, sculptures, mixed media and more. You can pick your favourite artist or species of shark. Or you can select the perfect artwork to make a statement in your home or office. Whichever you choose, you will be supporting the work to protect these amazing animals.

One of the pieces of art has been selected to be auctioned live by Steve Backshall at the For the Love of Sharks event at the Royal Geographical Society in London on the 29th November. In addition to this, two further pieces will be raffled at this event, giving people a chance to win an incredible piece of shark art. For the Love of Sharks is the Shark Trust’s flagship evening. A night to celebrate sharks. Steve Backshall is the headline speaker at this event that will see other prominent shark advocates join him on stage.

Tickets for the event can be snapped up here:

https://thesharktrust.org.uk/Event/flos24

Those that would like to see the Oceanic 31 exhibition have one final chance. It is being displayed at the Pavilion at the Royal Geographic Society from 26th November until the 7th December. Entry is free.

Find out more here:

https://www.rgs.org/events/upcoming-events/oceanic-31

 Paul Cox, Shark Trust CEO, Said “This exhibition has given us the opportunity to reach out to a new audience. And inspire more people with the wonderful sharks and rays on which our Big Shark Pledge campaign is based. We are immensely grateful to the 31 artists who have worked so hard to create these works.”

Bid for your favourite Oceanic 31 artwork here:
https://superstars-auctions.com/sharktrustauction


Banner Image: Smooth Hammerhead by Alicia Hayden

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