Review: Aqualung i300 Dive Computer

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Review: Aqualung i300 Dive Computer

Anyone who has done an Open Water or Advanced course with me knows that I feel that a dive computer is the single most important piece of equipment a diver should own. With a dive computer on your person, you have full control over your dive and are completely self-reliant – which is exactly what you, as a certified diver, should strive to be. A divemaster or more experienced buddy is good to have as an added layer of safety, but your safety is your responsibility and no one else’s.

Yes, it costs a little bit of money – but really, if you factor in the years of use you can get out of it, the annual cost is not that high. And having all the information not only improves your safety, but your confidence as well – and that means you are more likely to dive.

At this point, I can hear someone going “yes, but i can do this with a dive table as well”. Yes, you can, in theory. I did a dive yesterday – max depth 30m, total dive time 58min and at no point did we come anywhere close to our no decompression limits. If you were on tables, you would be out of the water in 24-25 min. Do you really want to pay thousands of dollars on vacation and then give up on >50% of your dive time? Let’s get real. Dive tables are obsolete for recreational divers and for good reason.

But I digress. Getting back to dive computers: until now, it really wasn’t cost effective to buy scuba gear, including computers, in India. However, times are changing. As those of you who are members of our Facebook group know, the scuba market in India has finally evolved to the point where manufacturers are taking it seriously, and now it is becoming increasingly cost effective for people to buy gear here.

So that led to me scouring the various price lists to see if there was a dive computer that could be a sensible alternative to the Suunto Zoop, one of the heavyweights in entry-level dive computer category – and this search led me to the Aqualung i300.

Before we start, a word on ‘entry level’ – that is not the same as ‘cheapest’. The idea is to find a computer which has sensible set of features ie, one which includes everything that is essential, and where you are neither paying extra for a bunch of optional bells-and-whistles, nor saving money by giving up on things that are important (be it features or usability).

Aqualung i300 Dive Computer


The Aqualung i300 is an over-sized dive computer which has 4 modes: Air, Nitrox, Free and Gauge. The first 2 are for diving, the 3rd for skindiving/apnea and the last for use as a bottom timer when doing technical diving.

The first thing that jumped out at me was that the i300 has user-replaceable batteries. This is a heaven-sent. My personal computer, a Suunto D9TX, requires me to send it to Thailand every time the battery runs out – which means a couple of months without it. User-replaceable batteries are a ‘must have’, in my opinion.

The i300 also comes with a bunch of useful features: backlighting (for viewing in the dark), auto-detection of altitude and fresh water/sea water, the usual depth and time alarms & 2 unique alarms: a ‘Dive Time Remaining’ alarm (which can be set to beep to however many minutes before you hit your no-deco limit) and a nitrogen loading alarm (which can be set to beep when you hit 20%, 40%, 60% or 80% of your max nitrogen loading).

It gets credit for having a sensible Dive Plan mode – on many computers, including several Suunto models, accessing the Plan mode during a surface interval would only provide the bottom time based on the current surface interval. So if you were 30′ into the SI and wanted to get in the water after another 45′, there was no way to figure out how much bottom time you would get then – the Plan mode would only show you how much bottom time you had at that time. Thankfully, the i300 lets you add more surface time to the planning mode, which makes it actually useful for figuring out how long you have to wait or what your depth/time limits would be when you actually got into the water.

Two other neat features – it has a ‘Deep Stop’ option you can enable, if you want, and it also lets you specify the depth and duration of your safety stop.

In addition to the above, the Aqualung i300 also has all the other usual features – dive log mode, total number of dives logged, a conservative factor setting (which lets you make the computer more conservative), metric/imperial adjustments and the ability to sync with a computer with an optional cable (this lets you download your dives for review on a computer or online dive log software, and also lets you upgrade the firmware of the device if need be) and auto-on – although for some inexplicable reason, you actually have the ability to turn off the ‘auto-on’ function, if you so desire.

Lastly, the i300’s Free Diving mode is quite robust: not only does it includes things like a Countdown Timer (before you start your immersion), but the computer actually tracks your activities in Free Diving mode. So that means you can switch from Free Diving mode to one of the Diving modes (Air or Nitrox) at any time – many other computers, including several Suunto models, require a 24-48 hour waiting time before letting you switch modes.



All of this is well and good, but ultimately, the main purpose of a dive computer is to help you plan and execute your dives. How good is the i300 at this?

Let me take a step back and sign a paean to Suunto dive computers. They are one of the heavy-weights of the dive industry, and with good reason – sophisticated computer models, workhorse reliability and smart interfaces. However, the big knock against them has always been how overly conservative they are – they use a very advanced model called RGBM, which tries to predict and minimize silent bubble buildup in the body, but the downside to this is that your dive time is greatly reduced, especially on repetitive dives.

The i300 is made by Pelagic Systems – who also make dive computers for Oceanic, Mares and others, and who are one of the leaders in developing decompression algorithms. The i300 uses their PZ+ algorithm, which is a moderately conservative algorithm, slotting in between the liberal DSAT model (also created by Pelagic) and Suunto’s conservative RGBM model.

So in theory, this should give you more bottom time, especially on repetitive dives.

But hold on – isn’t it better to have a more conservative computer? I sort of agree with that – their extra conservative model is the reason we use Suuntos in our dive center, after all.

However, the decision-making for a dive center is going to be different from the decision-making for an individual: we have to take into account divers of all body types, fitness level, age groups, health levels and abilities. You only have to take into account yourself.

And the inescapable fact is that millions of people have been diving safely for years using variations of the Buhlmann model (which is the compartment-based model that you learn in Open Water and even Divemaster), of which the PZ+ is a derivative. So at what point is a computer conservative enough?

Suunto themselves recognizes it to some degree – on their higher end computers, such as the D9, they offered a setting which would let you make the computer less conservative.

Generally, my belief is this – unless you have a condition which requires you to be more conservative when it comes to DCS (age, fitness, overweight), the PZ+ algorithm is going to be more than adequate at keeping you safe – just be careful about watching your ascent rate, give yourself atleast an hour between dives and follow all the concepts of safe diving that you learn in Open Water, and you are good to go.



Over the past few days, I have taken the computer for a bunch of dives, along with my Suunto D9TX and a Suunto Zoop from the dive shop. To test how the computers responded to various diving situations and emergencies, not only did I do a day of regular diving, but I also took all 3 computers into decompression, and did a day of reverse profiles (a shallower dive first, a deeper dive second).

The computer behaved pretty much as i expected: on the first dive, I got a bottom time that was somewhere in between my D9TX (which has the reduced RGBM algorithm) and the Zoop (which has the full RGBM algorithm). The difference between all 3 computers was fairly small. On the second dive however, the i300 gave me a little bit more bottom time than the D9TX, and both gave me significantly more time than the Zoop – this is pretty much what I expected, given the algorithms.

The backlighting worked well, the tactile buttons were a pleasure to use, and all the automatic features of the computer worked precisely as they were supposed to. And the readout is very clear and easy to read, with all the essential information available at a single glance.

On the reverse profile day, the same held – all 3 computers gave readouts that were ‘sensible’, with similar bottom times as earlier.

On the decompression dive, there was a significant variation, however. I went down to past 40m and hung around till all 3 computers went into deco (no significant differences in bottom time here) and started to ascend once both computers were showing me 5′ of ascend time. As i ascended to a shallower depth and the controlling compartment changed, the Sunntos gave me credit for off-gassing on the faster compartment and the deco obligation cleared by the time i was at 15m. However, the i300 obstinately kept that deco clock ticking till I ascended to shallower than 10m.

This is a key difference – the Suuntos are designed for decompression diving (provided you are trained and qualified to know how to use them for this), whereas the i300 is strictly for recreational, no-deco dives (and it doesnt pay any attention to that ‘recreational deco’ nonsense) – So someone who is a technical diver or planning to become one may prefer a different computer. However, for the vast majority of recreational divers, this isn’t such an issue. You shouldn’t be going into deco anyway.



2 weeks ago, if you had asked me to recommend an entry-level computer, I would have blindly said Suunto Zoop/Vyper – why? Because i am a long-time Suunto user – and Suunto is also the brand that we use in the dive shop, with excellent results.

However, while the Zoop still makes sense for the dive center, I think that for an individual diver, the slightly less conservative algorithm of the i300 makes it a better buy, especially given that prices are comparable.

There are a couple of cheaper options out there, such as the various 1-button dive computers like the Mares Puck. However, going back to what i wrote earlier about the difference between ‘best entry level’ and ‘cheapest’ – single button interfaces are a pain in the rear. Given that the monetary savings would have been very modest, I ruled those out.

There are also more expensive options out there – what a greater price gets you is a smaller form factor (so you can wear it like a wrist watch – which is actually a really good thing: it goes with you whereever you go, so you are sorted if you make a last-minute decision to go diving somewhere), air integration via optional tank transmitter (so you can see how much air you have left, both in bars and time, based on your breathing rate), an in-built digital compass (that’s nice to have for serious divers and pros) and, at the highest end of the scale, the ability to switch gases between various nitrox and helium blends and rebreather modes (useful for technical divers).

All those features are nice to have, and if budget allows, by all means go for it. A Suunto D6 or equivalent is a great buy in that price range. But if you are a casual recreational diver who is not looking to spend a huge amount of money on unnecessary gear, the Aqualung i300 gets my vote as the first piece of scuba gear you should own.

Buy the i300 at a special price


Deep Sea Diving India

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Deep Sea Diving India


DIVE INDIA at Havlock, Andaman and Nicobar Islands

Scuba diving, or ‘deep sea diving’ as it is popularly known in these parts, is a sport consisting of exploring the underwater world using Self-Containing Underwater Breathing Apparatus (S.C.U.B.A.). At the recreational/sport level, it is conducted from depths ranging from 5m to 40m.    Beginners can experience the thrill and excitement of deep sea diving by doing an Intro to Scuba program, whereby they get a guided dive with a dive professional up to depths of 12m. Those interested in a richer/more extensive scuba diving experience can do the Open Water certification course, a 4-day program which trains them as scuba divers and includes atleast 4 open water dives in the ocean.
Diveindia is the pioneer of scuba diving, in the Andamans, India’s largest scuba diver training center and India’s first scuba diving instructor training facility. Our highly-experienced team (which includes 2 full-time instructor trainers on the staff) has developed a unique training curriculum which takes the standard Open Water course taught across the world and builds upon it to provide one of the best beginner certification programs you will find in Asia. We also conduct daily deep sea diving programs for beginners who just want to try scuba diving and experience breathing underwater – catering to all skill, fitness and comfort levels (including nervous divers!).
If done properly, diving is an extremely safe sport and we take great pride in not just meeting but exceeding international safety standards when it comes to diving safety.

Come experience Deep Sea Diving in India at Havlock, Andaman and Nicobar Islands with DIVE INDIA


Deep Sea diving india

Dive India

Deep Sea diving india

Deep Sea diving india

Deep Sea diving india

DiveIndia Awarded India’s Favourite Adventure Operator

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Award Dive India

Port Blair, March 28: Andaman’s oldest scuba diving center ‘DIVEIndia’ has been awarded India’s Favourite Adventure Tour Operator, based on a poll of over 7500 readers of Outlook Traveller magazine and website. Vandit Kalia, Managing Director of the company, was presented with a plaque and a certificate by Shri Parvez Diwan, Secretary of Tourism, Ministry of Tourism, Govt of India, at a function held in New Delhi.

The poll, validated by IPSOS, is an authoritative benchmark of consumer preferences in the areas of travel and tourism, including hotels, airlines and holiday destination and is part of an annual survey conducted by Outlook Traveler Magazine.

Commenting on the award, Kalia said, “This award goes to each and every person of the team, all of whom have quit corporate careers to pursue their passions – we strive to offer the highest quality scuba diving services and at the same time retain a personal touch, and being recognized by our guests for this is one of the most rewarding things for all of us, especially as it comes during our 10th year anniversary”.

DIVEIndia has been operating in the Andamans since 2003 and has established itself as one of the leading dive training agencies in India, offering training programs all the way from beginner to instructor. It celebrated its 10 anniversary in December 2013, and has plans to expand operations to cover all major Indian cities.

Muck diving comes to the Andamans

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Posted by Dive India |

So far, muck diving has been synonymous with Lembeh in Sulawesi.  Well, the Andamans is a geographical extension of the same region, and we – especially Vikas and Sayeed – have been exploring the macro realm quite intently, looking to expand the scope of what is available here.
During the season, we found a few “firsts” for the Andamans – electric clam, frogfish and devil stinger.  And now that the off-season is slowly coming upon us, we have been doing some exploring… and this past week, we found the archetypical muck diving site:  black sand, no rocks or coral, just lots of sea urchins and massive feather stars.  And while here, 2 exciting new discoveries:  ambonscorpionfish (!!!) and robust ghost pipefish!
With an average depth of 18m, and sloping down to 60m plus on one side, this site is accessible to all diver levels and we are also planning to do blue-water dives off from here, hoping to find hammerheads (fingers crossed).   Will keep the world posted on what happens!
The site name is V16 for now, and it will be on our schedule of regular dive sites from next season.

Ah, the possibilities…

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Posted By Vandit Kalia |

So Vikas and I spent 3 days, sitting at the Port Blair port, waiting to get everything sorted so that we could lower our boat into the water (a process which, if one removes the waiting time, took an actual 20 minutes of effort). Yesterday morning, we woke up at 4:00am and headed over to the pier, departing Port Blair by 5, just at the crack of dawn.
Flat calm seas, beautiful lighting, a few sleepy gulls and Mako, purring along with her engines at mid-revs. A couple of bursts of speed got the speed up to well over 40knots and put big smiles on our face.
Today, Gregorio and his friends from Spain, who’ve been diving with us for the past 8-9 days, became the first divers to go on a dive trip on Mako – a sunrise dive at Johnny’s Gorge. Departing at 5am, we were there by 5:20am and had an amazing dive. A couple of the divers claimed this was their best dive ever (and these are people who have dived Galapagos and Sipadan, mind you), for the sheer wealth of fish life on the site.
So, this is what the future holds for DiveIndia this season — dawn dives, expedition trips to Barren Island, Invisible Banks, Campbell Shoal; extended range of day trip from Havelock to include North Button, Port Blair and Neil Island (including the drop-offs around Neil, where supposedly big sharks hang). These will be exclusive trips – 4-6 divers, 1 guide and 2 or 3 tanks, depending on where we go.
At the risk of sounding like we are tooting our own horn (we are, I admit, but I think we’ve earned it ), we can safely say this represents another evolution in what diving in the Andamans has to offer. The first was the new sites discovered by Johnny, Dixon and Jackson; the next was the North Safaris and now this.
As of now, we will be running day trips to virtually all sites visited by liveaboards, and a lot of other sites that they don’t know about (there’s that local expertise coming into play again). And you get to experience the magic of the Andamans as well…
Yep, it’s been a while since our last blog, but I think this one was worth it. We’ll be posting videos and clips online very soon as well.
Safe diving,

Teaching kinesthetic awareness – for instructors

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Teaching kinesthetic awareness

Posted by Vandit Kalia |

Every instructor is familiar with this scenario: take 10 students and teach them the same Open Water course, and 6-7 will be competent, 2-3 will be excellent and 1-2 will be at the cusp of acceptability – they may meet all the skill requirements, but the instructor knows in his/her heart that this student is not yet ready to dive independently.
There could be many reasons for this, but a common (and often-ignored) cause, and the subject of this article, is kinesthetic awareness (or K-Factor, to coin a sexy phrase) or lack thereof.
A student’s first immersion in water leads to a lack of physical coordination – gravity, balance and force don’t work the way they are used to. The weight shift that they use on land for balance correction only causes them to topple over. Using their arms for balance doesn’t help. Their body simply doesn’t behave the way they expect.
Most students start adapting very soon – I typically see a big improvement about half-way through the confined water session, and then on each additional dive. In fact, this continues all the way through to Advanced Open Water (which leads to my article on when to do the Advanced Course, but that is a separate topic). Slowly, they realize that doing A and X leads to C and Z underwater, and not B & Y, and their brain starts to build the neuro-muscular patterns needed to replicate this. This process is very similar to the way you learn to play a racket stroke, golf swing, basketball shot, etc. etc. In other words, the student starts to gain a new set of kinesthetic awareness for the underwater world. When this happens, it is as if a switch has come on – they slow down and stop fighting the water, their movements become deliberate, their buoyancy improves and they no longer resemble puppies on speed underwater.
But what about the small percentage of students who simply continue to fight it and simply don’t gain that K-Factor?
Let me go off on a seeming tangent now and talk about a dive industry secret that you don’t know, or whose implications you have not considered. The secret is this: the role of most dive agencies is not to product highly-qualified divers, but to make diving accessible to as many people as possible while maintaining acceptable levels of safety.
And for the record, while this approach is far from perfect, I am not saying it is inherently a bad thing. If you want to ski, do you need to be an expert skier who can handle black diamonds before being let out on the slope? Of course not. You merely need to learn the basics and then you go forth and ski, and continue to develop skills (this aspect – of continued skill development – is often ignored by the doom’n’gloom brigade who rend their garments and beat their chests at the state of diving today).
In a similar vein, diving courses tend to focus on teaching the basic, specific skills needed to dive safely – how to clear your mask, how to share air, how to achieve neutral buoyancy, etc. After that, you go forth and continue to develop those skills and have a bunch of fun in the process.
Using Bloom’s taxonomy, the focus in entry-level training courses is on getting up to the Comprehension level in the Cognitive domain, and Mechanism stage in the Psychomotor domain. Sure, a conscientious instructor might go up one or two stages higher in each of these domains, and also perhaps up to the Valuing stage in the Affective domain, but strictly speaking, it is possible for a student to get certified if they merely achieve the above-mentioned two stages.
Leaving jargon aside, what does this mean in reality? It means that if the student is able to understand dive theory to the point of being able to pass the exam (Comprehension) and able to satisfactorily perform a set of complex tasks (Mechanism), then he is ready to be certified – which, as we all know, is not the same as being qualified.
Oh come on, Vinnie, you are such a pessimistic cynic, you say. My students do a lot better than that, and are able to apply the information I have taught them to new situations [Application and Adaptation], you claim.
Sure. A lot of instructors do ensure that their students are able to integrate what they’ve learned, and actually master the motor skills they were taught, to the point that they can apply them with some situation-specific modifications as needed. However, my point is that due to the focus of the dive industry in making sure diving is accessible to as many people as possible, teaching standards of most agencies are focused on achieving basic competency and safety, that’s all.
So now let’s go back to our student diver who has successfully completed all the skills but hasn’t stopped fighting the water yet.
Any instructor who cares about producing qualified divers (and sadly, this breed is not as common as you would think, given that scuba is a passion-driven sport) will not just hand out a C-card to this student. However, this where the support system provided by the agencies tends to fall apart.
While experienced instructors usually develop, through trial and error, their own set of exercises to help such a student achieve aqua-zen, newer instructors are often left to their own devices in such cases. Some of them give up on the student. Others just say eff it and certify the student, to ensure that they get their salary commission or meet their targets. Yet others waste time repeating buoyancy drills or mask clearing drills or whatever, sometimes frustrating the student to the point where they are put off diving for good.
Not surprisingly, as there is nothing in any Open Water curriculum I have seen that even discusses this problem, let alone give tips on how to solve it.
As such, I’d like to address this gap by suggesting a few tips of my own for teaching kinesthetic awareness to students – and do note, these tips are by no means exhaustive, there is some overlap between the concepts in them, and there are plenty of other ways to teach this as well. These are simply tricks that have worked for me and instructors I have taught/worked with.

1/ Start by making sure kinesthetic awareness is the issue, not something else
Sounds obvious, doesn’t it? But accurate diagnosis of the problem is often harder than it seems. As instructors, we all know what the critical attributes for a particular skill are, and how to pinpoint skill mistakes by checking the critical attributes. But when a student is fighting the water, it is harder to figure out if it is a matter of nervousness/fear of the water, lack of the K-factor, or a specific lack of knowledge on how to perform a specific skill. To complicate things, nervousness can be increased by the lack of K-Factor, and vice versa. While there are some things that can indicate a likely reason, they are not reliable and my goal with this article is not to handhold anyone (or provide guidelines which can be mis-interpreted as rules), so I am not going to get into specifics – suffice to say, simply by knowing the possibilities, you can start the process of eliminating them by observing and chatting with the student.

2/ Allow the student to struggle a little
Yes, that is correct. A lot of instructors will pile on with a bunch of instructions, signals, exercises, etc. right at the beginning. I suggest the opposite approach – let the student struggle a little with flappy hands, moving around a lot, etc. and then start to work on specific exercises to correct them. Now, the trick is to only let them struggle only a little – too much, and they start to build in bad habits or get discouraged. And needless to say, the struggle should be purely with motor skills, not mental or physical stress. The benefit of this is that the student has a first-hand experience to draw upon when you explain how to correct the problem.
For example, when I teach confined water, I initially do a short underwater swimming without any briefing on buoyancy, use of the BCD or lungs. We just go for a swim. Then I give each student one specific thing to try on the next swim. And so on.

3/ One thing at a time
It is very easy to overload someone with a low K-factor by giving them a complicated briefing with multiple sub-skills. For that reason, it is best to work in small steps and give them one thing to focus on. Give them time to experiment and truly absorb what happens when they try that one thing you have told them to work on. Once they get the hang of this, then go to the next one.
Hovering and neutral buoyancy is a skill where people with poor K-factor usually struggle: so usually I start by having them focus on one thing only – using their lungs to inhale/exhale and see what happens. They are encouraged to experiment with different breathing patterns in an effort to imprint upon their brain the relationship between breathing and buoyancy. At this point, everything else is secondary. Once they get this, then we go further.
Usually, each step in this process is related to the errors that have led to the struggling.

4/ Work on breathing and balance
The best way to learn proprioception (another fancy word for K-factor) this is to simply spend time in the water and feeling how your body reacts. I usually tell the students to let their body
do whatever
it wants, and just focus on relaxing and breathing. As you can see, this is an application of point #3 above – i.e., one step at a time.

5/ Complex to simple works well sometimes
Usually, the best way to teach things is to keep it simply and slowly add complexity. In principle, this is correct. However, take a particular Task X, which consists of sub-steps (or critical attributes, if you will) of A, B, C and D. Each of these is a simple task, which, when done in succession, accomplished the complex Task X.
By breaking X up into A, B, C and D, you are effectively simplifying the task. At that point, you can add complexity to when teaching sub-step A. And separately to B, C and D as well. Then, when you put them all together without the added complexity, each sub-step becomes easier to perform and the overall Task X ends up being overlearned.
Case in point: for the first few sessions, I over-weight my students and have them learn to achieve and maintain neutral buoyancy while overweighted in shallow water. Then, once this is mastered, the extra weights come off – so the added complexity of swimming while neutrally buoyancy is off-set by the simplication caused by proper weighting and greater depths.
Obviously, this has to be used selectively – and generally, it is effective only if it meshes with the overall geshtalt of your teaching style and progression. So dont go rushing in and making everything complicated right from the get-go. But if done right, especially for certain specific skills and within the proper framework of your overall teaching progression, it is a very powerful technique.

6/ Reduce pressure – allow student to practice on their own
There is a difference between a student not understanding what he needs to do, and a student not being able to perform the skill. With K-Factor issues, lack of understanding is not the problem – it is the ability to perform that is. In such cases, it helps to give the student time to work at their own pace, without the added pressure of someone watching and evaluating them.
I am often surprised by how much of a difference 5-10 minutes of solo practice can accomplish, yet many instructors – fed by an agency-fuelled diet of always needing to supervise and control – find it hard to leave the student alone. Find a safe place in confined water for the student to practice, give them 1-3 simple and specific things to work on and leave them alone for a while: you might be surprised by the improvements in a short term.

7/ Give them time
Sadly, there is no shortcut here. You cannot teach K-Factor, the students have to acquire it themselves. And nothing beats time. Obviously, there are limitations on time imposed by external factors, and there, each dive center has its own policy. I would encourage instructors to ensure an environment which minimizes time-related stress for the student – and by time-related stress, I include cost-related stress as well: i.e., “If I don’t learn it now, I will lose $X or have to pay $Y for more training”.

I realize not every dive center can operate this way, but our approach is we charge a student a certain fee to teach them to dive – and that takes whatever time it takes. This isn’t as extreme as it sounds: with most students, even those with fairly poor K-Factors, it only requires a few additional sessions, including perhaps some solo practice time, for them to gain competency. And realistically, a student who has such poor K-Factor that he need substantially more time is probably not ready to be certified at this point of time anyway.

8/ Non-scuba skills work
Snorkeling, skin-diving and even swimming sessions are a good way to build K-Factor. And as an added bonus, a lot of this practice can be done outside training time.
The Total Immersion swimming books and videos have a couple of good drills on teaching balance – these are primarily geared towards swimmers, but I have found that the same balance drills are actually very helpful for students with acute K-Factor issues. Because practising these drills do not require scuba gear, the student can work on their water balance in a pool or beach-side, between training sessions or even after certification.

9/ Teach relaxation
Try this – unclench your stomach and your glute muscles. When you do, your whole body relaxes. In martial arts, when doing chi-flow exercises, relaxing/tightening the core is one of the basic exercises for developing chi flow. On a more prosaic level, it is impossible to be stressed, struggle and to retain air in your lungs when your stomach and butt muscles are relaxed. When a student focuses on this aspect, he is too busy to struggle in the water – in the meantime, his subconscious brain is busy learning proprioception and re-wiring his neural system accordingly.

10/ Patience and communication
As an instructor, it can sometimes get frustrating. You pride yourself on the thoroughness and efficiency of your teaching, and of how good your typical student looks in the water when done. And now you have someone who simply refuses to absorb your training. Even the most patient of instructors will have a few “COME ON ALREADY” moments. I have to admit, I have.
However, in such cases, it helps to realize that if you are frustrated, the student is doubly so. He is seeing you looking graceful in the water (as an instructor, you DO look graceful in the water, right?), he is seeing the other students doing the same thing a lot more easily – and you can be sure, he is frustrated by his own struggles.
This can make him stressed, which leads to clenched stomach/core and greater air retention in the lungs, which in turn leads to greater struggles. This can also lead to finding excuses – this isn’t working, I don’t have enough weight, etc. etc.
As an instructor, you need to find the right balance between being encouraging and positive, and at the same time, not wasting too much time entertaining false excuses.How you deal with it varies depending on you, the student, the dynamic between the two of you and the situation, and can range from gentle encouragement to firm instructions and even tough love. Regardless of how you choose to handle it, use empathy (not sympathy, mind you – the two are different) to understand what the student is feeling and figure out the best way to get them to improve.

10 tips to improve your diving

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Posted By Vandit Kalia |

A common discussion theme among instructors in various forums has to do with agency standards, and how such and such agency makes better divers because of such and such skill or requirement or whatever. Most of these arguments are of the “how many angels can dance on the head of a pin” variety, and seem to be mired in a reality which is very different from what I have seen/experienced in my years of diving.
The fundamental basis of all these arguments is the implied belief that if you don’t learn it in a course, you will never learn it – in other words, no learning or improvement takes place outside of a formal course environment. Implied in this, of course, is the corollary that you need to keep doing courses in order to improve your diving.
Now, let me be clear – diving courses have their place. Depending on where you are in your diving skills, a properly-chosen and well-taught course, be it an SSI Specialty, a PADI Rescue course or NAUI Master Diver course, can help you elevate your dive skills to the next level. When it comes to gaining specialized skills, a specialized course is a great way to kickstart your learning and point you in the right direction – but even here, the course is merely a starting point. You won’t learn wreck diving or deep diving or perfect buoyancy after a 2-3 days course – you’ll get the fundamental skills which you can then develop by yourself.
Note the key phrase – develop by yourself. Contrary to the industry-perpetuated belief – which a lot of well-meaning instructors also seem to have adopted – a lot of diving skills should be, and are, developed by the diver on their own.
Let me put it this way. You come to do a diving course with us. During the course, I teach you all the skills that the agency requires us to teach, plus some extra stuff which I feel is important for you to know and practice. Now, what happens if you don’t dive again for another year? You will forget your skills, regardless of whether I taught the course in 4 days or 14.
Now, diving is something you presumably do because you like it – so it shouldn’t be too difficult or an imposition for you, as a diver, to continue to work on improving your skills. And because I feel improvement is something that happens on every dive, I’m going to share 10 tips with you on how you can do so.
In no particular order:

1/ Engage your brain
T oo many people are simply content to follow the divemaster, going where he goes and coming up when he says come up. Nyet, nein, no. By all means, go with a divemaster – s/he knows the local reefs a lot better than you and can show you the Good Stuff. But your dive and your safety is your responsibility, not the divemaster’s.
What does this mean in practice? Simple – ask your DM about what the dive site looks like and which route he’ll be taking. At all times, try to keep in your mind approximately where the boat is. Where your buddy is. How much NDL you have left. How much air you have left.Whether you have enough air to make it back to the exit point or not (more on this later). Etc. If a giant hand were to hypothetically sweep in and disappear with the divemaster, you should be able to continue the dive without him/her. This will generally require owning a dive computer – one piece of dive equipment that I think every keen diver should own, btw.

2/ Know your air usage
There are formulas for calculating air consumption. Very few people outside of forum heroes actually use those formulas underwater. However, you should always know what the reading in your SPG means in terms of real life air supply. When I dive, I know pretty much how much air I have (within 10 bar), based on depth and time. I don’t need to do any calculations, I just know. How? From what I remember from past dives.
So try this exercise. When you start your ascent, note your depth and air. Note how much you have when you surface. Write this in your logbook, also noting whether it was a free ascent or on a line. Soon, you’ll know how much air you need to ascend from 10m, from 20m, from 30m. Test yourself. Soon, you’ll know exactly how much air you need to surface safely, and will no longer risk running low on air on the ascent.
Building on this, another exercise is to periodically look at your depth, your time and your SPG. A little later, while more or less at the same depth, check your time again and see how much air you have now. So it could be that you’ve used 30 bar of air over 10 min at 20m. This, along with some simple algebra gives you an idea of your air consumption rate. Once you get the hang of this, try to predict what the numbers will be.
This doesn’t take a lot of time, but is a good way to understand and track your air usage.

3/ Test your weighting
Too many people dive over-weighted. As an instructor, it is easy to teach Open Water by putting a couple of extra kilos on a student and having them swim while slightly negatively buoyant (besides, many OW courses seem to actually forget the swimming/diving component – they seem to consist entirely of “do skills and surface”) – the student is less likely to float up to the surface this way. The student is also less likely to learn proper buoyancy this way, but that is typically considered an irrelevant detail.
So what I’d like you to do is this – after a dive, run your tank down to 30-40 bar. Then empty your BCD completely. Lock your ankles together and fold your arms near your chest, so you don’t kick or scull. Relax and exhale – you should sink. Inhale, and you should come up the same amount. You inhale and exhale the same way you do when diving. If you are sinking or not coming up when you inhale, you are too heavy.
When you go up and down by the same amount, that’s your correct weight for that gear combo. It will change a little depending on BCD type and saltiness of the sea but it gives you a starting point. Oh, and this weighting doesn’t change depending on how deep you plan to dive. If anyone says you need more weight cos you are diving deeper, ignore them.
Note – this is for a typical tropical suit and also builds in a bit of a buffer if you need to do a safety stop while lower than ideal on air. While it also works for people diving in cold water, it will leave you slightly heavy when doing a safety stop. This is a good starting point; you can always modify it later once you know your specific needs. If you already know you have different requirements, you don’t need my advice anyway.
Second note – when you are properly weighted, you won’t need a lot of air in your BCD. If you have followed the method I have outlined above, you will be properly weighted. If you find yourself bobbing up and down while diving, work on your technique. And that leads us to….

4/ Fix your buoyancy
I have seen this happen with far too many Advanced Open Water students than I’d like – we go diving, they are happily swimming along at my depth. I stop and ask them to do likewise, and hover. And they start sinkingas soon as they stop kicking – they have to add several squirts of air to their BCD in order to be neutral.
Why does this happen? Either it is a teaching shortcut used by the instructor to make his/her life easier, or the student doesn’t have a steady breathing pattern and breathes one way when swimming and another way when hovering, or some combo thereof. Regardless, it is bad technique. It means that if you stop to look at anything, you risk kicking the life out of whatever is below you. It also means that you are not really enjoying the feeling of weightlessness that is the best part of scuba. And it means that you have to keep breathing and kicking while diving, which means you use your air faster.

So what do you do to fix it? Simple – every 5-10 min into the dive, make sure you are over a sandy patch or have some water column below you and stop kicking. You should stay more or less where you are, going up slightly when you inhale and down when you exhale. If not, add a small squirt of air and repeat until you are.

Now comes the tricky part – when you start to swim, odds are that you will go up, most likely cursing my name and the stupid, worthless advice you got on the Interwebz (don’t deny it). Well, is it any surprise? Your body and muscle memory is still used to kicking in a way that keeps you off the bottom – you’ve just sprung a surprise on it by not needing that lift anymore. You now need to re-train your kicking and breathing style. So do this – no longer are you going to go kick-kick-kick. You are going to go kick-pause-kick-pause. You are going to wait till you start to descend before you exhale. You can even point your head downwards a little to keep yourself from going down. And you are going to keep practicing this till you get better at it. Then you can apologize in your mind for calling me names.

5/ Keep your eyes and ears open
As Sammy Hagar sang, there’s only one way to rock – but there are multiple ways to do the same thing. So when you are on a dive boat, see how the local DMs do things. See how other divers do things. Ask them why they do what they do. Always take the answer with a grain of salt, as many times divers follow less than ideal diving practices. But sometimes,

you’ll learn useful little tricks. Also see how the local DMs conduct dives in their specific conditions – you’ll learn something there as well. Remember – just cos you were taught diving one way doesn’t mean it is the only way.

6/ Dive with a buddy – really
Recreational scuba diving is a very safe sport with a very low incident rate of injury. And of this small % of people that get hurt, a very miniscule percentage actually die. And according to some studies, in 90%+ (97%, if memory serves me right) of those fatalities, the victim was separated from their buddy. No matter how slice or dice it, this number makes it very clear – stay with your buddy and a safe sport becomes orders of magnitude safer.

People dive solo all the time. I do occasionally, even. But I do it knowing what the risks are and willingly choose to take those risks. I also have backup plans to deal with those risks and have dealt with enough problems underwater to know I can realistically deal with those risks (more on this later as well). And even then, I know that there is always the chance of something going seriously wrong and that a minor incident could be potentially fatal. Informed acceptance of risk.

You are an adult and how you live your life is your business. However, I will say this – most divers are not experienced enough to know the various risks of scuba diving. 50-100 dives including a bunch to 30m don’t make you an experienced diver. If you dive solo, no matter how experienced you are and whether your card says “OW” or “Instructor”, you are running the risk that a small incident could snowball into a fatal accident. Stay with your buddy. And play a little game – randomly, ask yourself “If my reg were to fail right now and I were to get a mouthful of water while trying to breathe in, could I make it to my buddy?” You’d be surprised how often the answer is “no.”

7/ Be realistic about your abilities
Some of the worst divers I have seen are the ones with 30-60 dives to their credit. They have enough dives to be somewhat experienced – dived in 2-3 different locations, if not more; multiple deep dives; usually 1-2 courses beyond Open Water, etc. They have a lot of theoretical knowledge and reasonably good dive skills. But this makes them overconfident. And overconfidence doesn’t just bite you in the ass in the sea – it can tear big chunks out of you.

It is one thing to have done a regulator exchange in a class, with the donor facing you at an arm’s length away and an instructor watching. It is another thing to be at 30m, suddenly have a problem with your air supply and realize your buddy is 15m away and looking elsewhere. It is one thing to know how to navigate in a class, and another thing to be all alone in low vis, with no one around you and no idea where to go. Etc. etc.
Classroom drills may teach you the mechanics of a particular skill, but they cannot really tell you how you’ll react in a stressful situation. You only find that out the hard way – and keep in mind, how you react to stress underwater is very different from how you react to stress elsewhere. I have learned the hard way that I am very calm under stress in the water – but put me in a situation involving heights and I’d be panicking faster than you could say “don’t look down”. So just because you have proven yourself to be calm under extreme stress in a different environment doesn’t mean you’ll be calm under stress underwater.
Obviously, the hard way is not how you want to find out that you are prone to panicking easily when stressed underwater. So just because you’ve done a skill in practice, don’t think you can do it in a live situation when your HR and adrenalin levels are jacked up. In other words – play it safe and don’t put yourself in a situation where you have to rely on your problem-solving-skills-under-duress to be safe.
And to improve the odds of your successfully completing a safety drill when needed, practice. The more you practice, the more you develop muscle memory and the less cognitive effort required on your part to do the skill. In simple terms, this means that you are more likely to automatically perform the skill even when the thinking part of your brain is occupied elsewhere (handling extreme stress, for example). Some skills that should be absolutely automatic for you – mask removal/clearing, air sharing and deflating your BCD.
8/ No mask, no problem
The biggest cause of injury to beginner divers is uncontrolled ascent. The biggest cause of uncontrolled ascent – water in the mask leading to inhaling a little water through the nose leading to panic. If you struggled to clear your mask in the OW course and barely managed to get it done, keep working on it.
One useful skill – lie facedown in a bathtub (or swimming pool) with just a snorkel in your mouth – get used to breathing in and out from the mouth, and keeping water from going in your nose. You should be comfy enough that if someone were to rip your mask off your face suddenly on the dive (maybe the same giant hand that took away the DM in point #1 above?), it shouldn’t be an issue.

9/ Avoid peer pressure /know when to say no
You’ve come a long way, at significant expense for a holiday. Your significant other is excited about the dive. But the dive conditions or the dive site are making you nervous. Everyone else on the dive boat seems to be very excited about it, but you aren’t sure if you can do the dive. Sound somewhat familiar? If you are like a lot of people, you may suck it up and go for the dive while stressed. And then, if something goes wrong, your stress increases significantly till it becomes panic.

Now, I am a firm believer in trying to push your comfort limit. If you don’t push yourself, you don’t improve. But the decision on how much to push is yours and yours alone – not mine, not the divemaster’s and not your significant other’s. If you are not sure about something, ask for more information/assistance in how to do it – repeat till you are confident that you can do it. If you are not confident, do not do it. No single dive is worth risking your health and that of the others around you.

10/ Dive more
By all means, stay abreast of dive developments – get magazines, subscribe to Divers Alert Network (the Good Guys of diving), etc.
But remember – diving is learned in the water. You can read many books on mountain biking as well, but you need to get on the trail in order to learn to bunny hop. By the same token, you can read all about the theory of diving, but diving is done in the water. If you don’t dive enough, you will not become a better diver. No amount of courses, instruction, etc. will make up for it
For those of you that live in India, there is access to excellent diving from here. Not only is there a Most Excellent Dive Center in the Andamans, staffed by instructors that are scuba gods made flesh (and very modest, to boot), you have cheap flights to Maldives, Indonesia, Malaysia and Philippines – all of which offer superb diving.
So get out there and dive.
Obligatory legalese – this article is geared towards certified divers and is not intended to replace actual instruction. Also, the content is inherently general – since we are not there to personally supervise how you, we cannot guarantee that you’ll be able to do them safely or if there are any specific conditions that apply to you which might make practising any of the skills or concepts in this article hazardous to your health. So whatever you do, you do at your own risk. In fact, you should assume that anything you read on the Internet is extremely bad advice and ignore it. We are not responsible for any injuries that may be caused, etc. etc.

Which agency is better – or, how to select an OW course

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Posted By Vandit Kalia |

Visit any popular scuba forum, and one common question that is encountered is – which agency is better.
Well, there is an easy answer to that – none.
The standards for basic Open Water training are set by an agency called the Recreational Scuba Training Council. All the major agencies are members of this council, so the essential standards are more or less the same. There are some minor differences in how agencies approach teaching, their standards and so on. However, these are akin to different routes for climbing a mountain – you get there in all cases.
The popularity of one agency over another typically has more to do with business reasons (cost of becoming an instructor, marketing benefits, cost of certifications, and so on), none of which really affect you as a student diver.

Anorther concern some students have is – “I have not heard of PADI/SSI/NAUI/NOB/SDI, so will my card be accepted worldwide?” Short answer is – yes, it will. Just because you have not heard of the smaller agencies is not really a big deal. After all, why would you, a non-diver, have heard of all the different agencies out there? You can be assured that the dive centres you visit, however, HAVE heard of these agencies and recognize them. All of them.PADI, SSI, NAUI, CMAS, SDI, ACUC, NOB, BSAC and more. They are all valid and recognized agencies.
Look at it another way – as a dive centre, we are in the business of taking qualified divers out for dives. Why would we turn away someone from a recognized agency? Now if someone shows up with Bubbajohn’s Scuba Card, that’s one thing. But turning away a diver from another agency would only happen for two reasons: one is ignorance, and the other is some kind of personal bias or ulterior motive (perhaps selling you another course). Either is a reason to go dive with another operator.
So instead of agencies, let me give you 2 bigger variables that you should consider, when it comes to the quality of your diver training:
One is the instructor. A good, conscientous instructor will make sure you are truly comfortable at each stage of the learning process before moving on to the next. Diligently following the standards of any agency generally ensures a thorough course. On the other hand, an instructor that cuts corners will teach a shoddy course, regardless of which agency he is affiliated with.
Another is you, the diver. No matter how well a course is taught, if you don’t get in the water again for another 6 months or a year, you can be assured that your skills will atrophy to some degree or the other. Diving, like any other sport, relies on repetition and practice for mastery. The Open Water course gets you to the point where you have learned the basic skills and are ready to continue growing them through independent diving.
To use a golfing analogy, the Open Water course would be the bit where you take your newly purchased clubs and get lessons on hitting the ball till you are able to hit the ball decently without digging up huge divots every time. However, to become a good player, you still have to go out to the course and play regularly.
Some people have a natural ability and leave the Open Water course as fairly polished divers. Others leave a little “rougher around the edges” and need a little more practice. That is fine. Diving is not a competitive sport, and as long as you are able to maintain your buoyancy and are calm in the water, it is ok if you flap your hands a little bit to steady yourself as you swim. You only get better with practice, after all.
So, let’s now look at a list of factors that you should or should not consider when doing an open water course:

  • Agency – there are minor differences in each of the courses. While the name of the agency is irrelevant, you should speak to your instructor about the difference between the agencies and which one is more suited to your needs.
  • Instructor – very important, but quite hard to evaluate. Some people say talk to the instructor and get a sense of the rapport you get from him. That works but only to a limited extent: yes, sometimes you can and do get excellent – or really poor – vibes from one particular instructor, and than can help you make a decision. However, other times you may encounter a smooth talker who may not be all the good when it comes to teaching. You can also ask about the instructor’s experience – experience is always good to have but sometimes, very experienced instructors tends to be burned out/brusque/lacking in patience, while newer instructors tend to be a lot more supportive and patient. Also, a good diver is not always a good instructor, and most agencies provide a lot of support to instructors for teaching Open Water so being a highly-experienced diver is not always needed in order to be a good instructor (although it generally does help) – so assess these factors only in conjunction with other areas. This is, admittedly, probably one of the hardest areas to evaluate and probably something to consider only after taking the next 2 points into account.
  • Course duration: it matters, but only in the context of how many other people are in the course. Some centres take great pride in the number of hours they have in the classroom – this is a great, low-cost way for the dive center to make the course sound a lot more intensive than it really is, but the fact is, diving is a practical/active sport and is best learned in water. Dive theory is not rocket science, and with modern videos and books, basic open water theory can be easily picked up in a day’s worth of study, lectures & quizzes. More is always nice to know, but can be done independently or after the course as well.

What you need to look into is how much time is spent in the water. Some places specialize in a course where confined water training is essentially rattling off all the skills once and that’s it – no swimming around and getting a hang of this whole underwater thing, no repeating various skills, etc. This then gets repeated in the Open Water portion of the course – divers go down, sit and do the skills, swim around for 5 minutes and up. Such a course has taught you the various skills of diving, but not diving. So make sure you get a course whichemphasises plenty of time in actual diving (which is where you will learn the meat & potatoes of diving).

  • Course policy – sometimes, even the best, most caring of instructors is hampered by dive centre policy – usually, this is “complete the course in X days.” This can mean that sometimes, portions of the course don’t get the attention they deserve. Also, as different people learn at different speeds, so what happens if you are not able to complete the skills or be thoroughly comfortable at the end of the allotted time? A good instructor will not certify you and you will only get a partial refund, if at all. This is probably better than getting a card for which you are not qualified, but it is still not the ideal solution for you.

So look into what your options are in case you have problems completing the course and need more time. The worst case would be a “sorry, better luck next time.” The better dive centres will offer you a chance to continue your training – either on a one-on-one basis, usually at an additional charge (which can be modest to extremely expensive) or by giving you a chance to jump into the next class. What you are looking for is a course where the overall setup is one that does not impose an external time/monetary pressure on you to try to complete the course within a strict timetable.

  • Class size – this is important. The more the number of people in the class, the more time you spend sitting around at the bottom of a pool or ocean bed waiting for others to complete their exercises. So a 45 minute session with 10 people is definitely not the same as a 45 minute session with 4 people.
  • Price – you are learning to go into an underwater environment where mistakes & problems, while rare, an have severe condequences. You are also getting a license which is valid for a lifetime. A properly taught course will help you fall in love with diving and ready you for a lifetime of adventure. A poor or shoddy course will leave you hating the sport. Given this, is a $50. $100 or even $150 difference in price really significant?

Hopefully, this article has provided you with a good basis with which to decide on where to do an Open Water course.
We encourage you to ask around and compare our courses to those of others, and make an informed decision.
Happy diving!