Nitrox Tank Preparation, Marking and Identification

If you own tanks and intend to use them for Nitrox diving (and you should!) there are a couple of things you need to do before filling them with your personal mix. It is impossible for a dive operator to determine, simply by looking at cylinder markings that indicate the cylinder was O2 cleaned within the past year, that a cylinder and valve have not been exposed to air or gas mixtures that would invalidate its O2 service rating.

Thinking About a Dive Trip? Get Nitrox Certified Before.

Like many specialty courses out there, there is an end goal to getting certified with enriched air, better known as; nitrox.

Once you have learned the benefits of diving with nitrox, imagine applying those benefits around the globe at some of the world’s best diving spots. You now have the opportunity to introduce your newly learned knowledge, and its advantages, away from home.

While out on your diving adventure, you may find yourself in one of two different situations; on a live-a-board or at a resort. One thing is for certain, you will be doing multiple dives a day and diving with nitrox is one of the best ways to lower nitrogen exposure levels over the course of your trip.

While on these dive trips, you will find that you will often be granted the opportunity to do roughly two to three dives a day, if you are staying on a resort. If you chose on a live a board, that number may go up to five dives per day, including night dives, over the course of five or six days. That is a lot of diving!

Diving Nitrox as a Safety Net

Nitrox-2Based on the end goals, divers may apply the use of nitrox differently. Many divers, when faced with the chance of getting wet for so many days and so many times a day, really want to use nitrox as a “safety” net. They know that they may be pushing their own limits, and like to have a safety margin incorporated into their dive profiles. How do you do this? Well, you simply keep your dive computer set to “air” while diving nitrox. This is a common practice for people that want to maintain strict limits throughout the course of a week, because they are exposing their body to so many dives within the course of a several days. This is a fantastic way to maintain a much lower risk factor in relation to decompression sickness that may be caused by high exposure of nitrogen from pushing the limits multiple times a day. However, you must be aware of what your MOD is (Maximum Operating Depth) and respect those limits. If you do, you are good to go!

Extending Bottom Time with Nitrox

Another application of nitrox in your travels is to help the divers get the most out of the bottom time, past the time when most other divers that are on air would normally have met their no-decompression limits. Imagine being at a dive site where the real action starts at 60 ft/20m It is your third day on your dive adventure trip, and already your fourth dive of the day. Depending on your profile, diving with air may give you limited time at 60 ft/20m, based on all the dives you have accumulated over the last few days. This is where a nitrox computer gets you the biggest bang for your dollar. By setting your nitrox computer to the mix you have in your tank, you may now have increased your limits considerably, allowing you extended bottom time on your dives. Please keep in mind you are no longer increasing your safety margins, as far as limits go, as you would be when diving nitrox as “air’ on your computer.

Is Nitrox Available for My Dive?

The availability of nitrox on a resort or a dive boat operation is one of the most common questions with Scuba Travel International. Because of the remoteness of certain destinations and costs associated with producing mixed gas, it may not always be offered at certain destinations – though we are defiantly seeing it grow based on the demand from divers all across the world. You may also find that many live-a-boards often be offer it for free or at a reduced cost.

So what are you waiting for? Go to your nearest SDI-TDI Dive Center and get started on your nitrox course before you book your next scuba adventure. Take SDI’s Computer Nitrox Course or TDI’s Understanding Nitrox course; BOTH academics for these courses are available on line.

SDI’s Computer Nitrox course will teach you how to properly use nitrox along side with your nitrox computer, while understanding the benefits of diving the mixed gas.

TDI’s Understanding Nitrox course is the first step to the Tech Diving World and a little bit more in-depth as far as the overall view on nitrox.

And do not forget to ask your dive center what trips Scuba Travel International may have in store for you.

Get SDI Certified for Nitrox Diving.

Contact SDI TDI and ERDI
If you would like more information, please contact:

SDI
Tel: 888.778.9073 | 207.729.4201
Email: Worldhq@tdisdi.com
Web: https://www.tdisdi.com
Facebook: www.facebook.com/SDITDI

Nitrox: Selecting Your Best Mix

Best-MixNitrox has come a long way over the years; from being a forbidden gas to the most commonly used breathing gas by divers. Despite the number of divers using nitrox, there are still some misconceptions about how nitrox can best benefit you during your dives and what the best mix is for your dive. In this article we are going to focus on the best mix, which will also address some of the benefits.

Environmental Conditions for Nitrox

Before we get to the formulas for how to figure out this best mix, we should talk about some factors that effect this decision. First, you need to know the environmental conditions such as: current, visibility, and temperature. All these factors affect your metabolic rate, which increases your uptake of nitrogen. Without taking these factors into consideration when deciding your best mix, you: a) may put yourself at risk or b) not chose the optimum percentage of oxygen.

PO2 for Diving Nitrox

Now that we have determined some of the environmental factors, it’s time to look at PO2’s. For recreational diving the maximum PO2 is 1.6. For a diver to choose a 1.6 PO2, all environmental conditions must be perfect: good visibility, no current, warm water temperatures, a low workload for the diver and the planed bottom time of the dive cannot exceed 45 minutes. If any of these factors are not perfect, you must lower the PO2. As an example, if your dive involves current, low visibility, etc. it would be best to set your PO2 to a maximum of something less than 1.3.

Atmospheric Pressure

The final decision making factor is depth. Because all formulas use absolute pressure, you must always factor in atmospheric pressure, or the pressure of the air on the water. The formula for determining best mix, PO2 and maximum depth is commonly referred to as Daltons Diamond (also known as a T formula). To determine best mix you must know the depth of your dive and the PO2 you want to use.

As an SDI Computer Nitrox diver, you have learned how to program your mix and PO2 into the dive computer and let it determine your maximum depth. Most computers will give an audible and visual alarm should you get close to or exceed your maximum PO2. Knowing the formulas above gives you a better understanding of how your computer works and should you decide to get involved in the technical side of diving, the above information introduces you to the basic formula for all future technical courses.

Now that we have discussed many of the variables that affect nitrox diving and determining your best mix, it is important to understand that not all dives are the same, so saying that one mix fits all would be incorrect. It is important to plan your dive or dives ahead of time and get the proper mix(s) in your cylinder(s). Equally as important is verifying the mixes you received, logging them at the dive center, labeling the cylinder(s) and then just before the dive, analyzing again.

The single most important things are that you are safe and having fun. Having some conservancy in your dive planning is a good move, and it will help ensure another day of diving.

Get SDI Certified for Nitrox Diving

Contact SDI TDI and ERDI
If you would like more information, please contact:

SDI
Tel: 888.778.9073 | 207.729.4201
Email: Worldhq@tdisdi.com
Web: https://www.tdisdi.com
Facebook: www.facebook.com/SDITDI

Benefits of Diving Nitrox

word-pictureFew advances in the realm of diving have had a more profound impact during the past two decades than the widespread availability of Enriched Air Nitrox. And nothing has made the switch from diving air to diving its more exotic cousin more straight-forward or more enjoyable than Nitrox programmable dive computers.

The really fun part of diving is all about being underwater. That’s what we train for, that’s what we look forward to, and that’s what we talk about with our friends. But most of us would agree that our dives seem to be over much too soon, and surface intervals seem to drag on forever.

NitroxOf course, we could extend our bottom time way past the recommended no decompression limits and execute staged decompression diving! But for most of us, the additional training, equipment and dedication necessary to properly plan and execute technical dives presents too much of a commitment. Is there a simpler alternative? Luckily there is: Nitrox allows sport divers like you and your buddies to extend your bottom times and to shorten your surface intervals significantly compared to your previous air dives.

When you dive using nitrox, you can take advantage of two major benefits. First, you can increase your maximum allowable bottom time. This happens because the extra oxygen added to your breathing gas has displaced nitrogen. As there is less nitrogen in the mix to be absorbed by your body, you can spend longer at depth before you reach the nitrogen limit – which is the decompression limit. Secondly, since you are absorbing less nitrogen on a given dive, your surface intervals can usually be shortened.

Are you ready to start enjoying longer dives with shorter surface intervals?

Get SDI Certified for Nitrox Diving

Contact SDI TDI and ERDI
If you would like more information, please contact:

SDI
Tel: 888.778.9073 | 207.729.4201
Email: Worldhq@tdisdi.com
Web: https://www.tdisdi.com
Facebook: www.facebook.com/SDITDI

Underwater Journal, Issue 24 is ready

underwater-journalUWJ Issue 24 is ready for download. If you have not subscribed, simply sign in and create an account (takes just a few minutes and it’s FREE).

This issue of underwater journal dives into some great features including: the mystery wreck of Helldiver and its discovery story. Did you know that there is only one Helldiver remaining in the world that is still in flying condition?

Also check out Pierce Hoover as he explores the Grand Cayman’s shallow water Kittiwake Shipwreck and the bell of the underwater ball. Did you know that there was a porthole cut in the top of the bell to allow light to enter and diver’s bubbles to escape?

Dive Raja Ampat with Mike Bartick and get a glimpse of where marine life diversity is amongst the highest recorded on earth, including a staggering 540 hard coral species, 1,300 reef fish and over 4.5 million hectares of rich, bio-diverse ocean to explore.

In addition to some of the fantastic dive sites, this issue discusses Gas Management techniques and pony bottles, future exploration with Exosuits, and spicy sauces to heat up your taste buds.

There’s much more to enjoy and learn, get your FREE magazine today. Don’t forget, UWJ is iPad compatible to download and save in iBooks.

This is YOUR MAGAZINE with lots of benefits. We appreciate your support and encouragement! Enjoy, and please let us know what you think.

Underwater Journal is the official publication of SDI/TDI/ERDI

Contact SDI TDI and ERDI
If you would like more information about please contact:
SDI
Tel: 888.778.9073 | 207.729.4201
Email: Worldhq@tdisdi.com
Web: https://www.tdisdi.com
Facebook: www.facebook.com/SDITDI

Liveaboard Diving in the Maldives

maldives-liveaboardLiveaboard diving in the Maldives is some of the best in South Asia – and honestly, some of the best in the world! The Scuba Travel International Team researches and pre-screens dive operations extensively before we book our customers with them, and let us tell you: there are liveaboard experiences that are just not-so-great.

Not so in the Maldives! As an example, our recent inspection of the Ark Royal revealed spacious cabins, with a lounge so large it took our breath away. Not only do you have up to four opportunities per day to explore the pristine waters of the Maldives – where manta rays are common sightings, sharks are often found, and large schools of colorful fish that can only be seen in this region flash by the healthy, vibrant coral reefs – but later, if you wish, you have a comfortable setting with which to connect with others who share your passion for travel, diving and adventure! These meetings can (and have) led to friendships that last a lifetime – and isn’t that the best sort of souvenir – connecting with like minded travelers on life’s highway?

Prefer some solitude? Take in the view from the deck, or luxuriate under the skilled hands of a masseuse. Retreat to your cabin and enjoy a movie – or simply revel in knowing that life’s pressures and responsibilities are on a far distant shore. Those who like to always be available will find comfort in knowing that cell service is available throughout the region. Smart phones and lap tops can access the internet for a nominal fee—so it’s super easy to let your Facebook friends know what a great time you’re having liveaboard diving in the Maldives!

Contact STI
If you would like more information Scuba Travel International or to schedule an appointment, please contact:
STI
Tel: 888.778.9073 | 207.729.4201
Email: Worldhq@tdisdi.com
Web: https://www.tdisdi.com
Facebook: www.facebook.com/SDITDI

You’re Booking that Dive Trip and Excitement is Building: Are YOU Ready?

If you have taken a recess from diving, there are many ways to get ready!

Inactive-DiverWe understand that many of you are busy…really busy! So, when we suggest you jump in your local stores and “shake down” your dive gear, you respond “yeah right!”

It was all you could do to drop your bag off at your local SDI facility and ask them to “check this out… I’m going diving!” So you know your scuba gear WILL be ready, but will you?

Here is a quick and painless suggestion as to how to get ready.

Visit https://www.tdisdi.com and check out which online course peaks your interest? Sign up and take it as a primer to get you thinking, and yes reflecting, on your upcoming adventure.

Once you arrive at your dive destination, come clean! Trust me, it won’t be the first time they’ve heard, ”I’ve been busy…” Don’t worry when you get started the words will come to you!

Once you get in the water take advantage of a simple shake down dive. If your buddy is not coming with you set your expectations high and team up with the most active diver in the group. Notice I said most active NOT highest certified… that person may be in the same boat as you (yes, pun intended).

Even if you are an ex-Olympic Swimmer, ease back into your diving. NEVER EVER try to pick right back up where you left off…unless you have done so through continuing education.

Go Get Wet …have FUN and tell your friends all about it! There is no better way to develop a larger circle of diving buddies!

Contact SDI TDI and ERDI
If you would like more information SDI, TDI and ERDI or to look up our eLearning courses with SDI, please contact:
SDI
Tel: 888.778.9073 | 207.729.4201
Email: Worldhq@tdisdi.com
Web: https://www.tdisdi.com
Facebook: www.facebook.com/SDITDI

Diving Instructor Trainer Workshop at SDI’s World Headquarters

SDI-ITW
From Left to Right: Erika Richard, Jill Dewey, Yuri Issac, Chip Petersen, Al Anzuoni, Uwe Rath, Andrew Haley, Dev Spradlin, Darren Pace, Gary Jenkins, Amanda Smith and Chelcy Elliot

International Training, parent company of SDI™, TDI™ and ERDI™ held their highest level certification course, Instructor Training Workshop at their world headquarters in Jensen Beach, FL the week of April 23, 2012.

Dennis Pulley, a member of SDI’s training department stated, “It was an absolute pleasure working with such a diverse group of divers. We had instructors from Belize, Mexico, Dominican Republic, Boston and the Carolinas come in for our latest Diving Instructor Trainer workshop. Not only did we pack the 7 days with extensive scuba training, we shared stories, laughs and we all gained a greater understanding and respect for the underwater world of diving.”

The Instructor Trainer Rating is International Training’s highest teaching level and the program focuses on development of evaluation techniques in the classroom, confined water and open water. Presentation ability and skill demonstrations at instructor trainer quality are also assessed throughout the program. Upon successful completion of this course, graduates may teach instructor level courses for all approved SDI™, TDI™ and ERDI™ levels, including conducting the IEC portion of the SDI Open Water SCUBA Diver Instructor Course. The course is intense and challenging but very rewarding. Interested in participating? Anyone wishing to receive further information about future ITW programs should contact the HQ Training Department at training@tdisdi.com.

Please visit https://www.tdisdi.com to learn more about the family of agencies and its worldwide network!

Contact TDI SDI and ERDI

If you would like more information about Instructor Training or to schedule an appointment with TDI, please contact:
TDI
Tel: 888.778.9073 | 207.729.4201
Email: Worldhq@tdisdi.com
Web: https://www.tdisdi.com
Facebook: www.facebook.com/TechnicalDivingInt

You’re Invited to Meet the Agency

What can SDI™-TDI™-ERDi™ do for you…?

You're Invited to Meet the TeamInternational Training’s agencies, SDI™-TDI™-ERDi™ will be at the Tacoma Dive & Travel Show from April 21st through the 22nd. We have so many exciting things that we want to talk to all Pro Members, Associate Members and non-members alike about. Be sure to meet with Shawn Harrison, Regional Manager for the northwest at booth #101 and say, “Hello.” We would love to hear from you!

For more information on what SDI™-TDI™-ERDi™ can do for you as a diver or a professional member, come see us at 12pm on Sunday, April 22 where we will have a presentation called, “Meet the Agency.” A lot of exciting changes have been made at International Training including our HQ move to Florida, a new website and the launch of TDI™ programs online.

Come and see what your next step in scuba training may be based on your interests and needs. Looking for a deep diver course? Interested in rebreathers? Do you run a dive team with your local fire department? Want to advance your career in scuba as a professional? We may have what you are looking for in the recreational realm, technical side of scuba and/or in public safety diving and training.

We are excited to be attending the Tacoma Dive & Travel Show from April 21st through the 22nd and hope to see you there. Contact Shawn Harrison at (888) 779-9073 or email shawn.harrison@tdisdi.com for more information.

To learn more about the training options available visit https://www.tdisdi.com today

Show hours are:

Friday April 20, Industry Only & Exhibitor Pack-in begins at 8 am with an Industry Social at 6 pm

Sat. April 21 from 10 am to 5 pm and Sun April 22 from 10 am to 4 pm

For 50% off your admission, print out this discount offer.

For a full schedule of events, please visit https://www.divenewsnetwork.com/tacoma-schedule-of-events.html.