What is Marketing?

The fact is, the diving industry and “marketing” have gone though a very similar evolution process.

The Current State of SEO

In 2015, SEO is about creating a complete experience that draws attention and makes your business stand out from competitors.

 

Diving in Extreme Weather

It is interesting to see how various teams around the globe prepare and train for seasonal weather changes.

 

Why We Love FFM (and Why You Should Too)

Dr. Thomas Powell
erdi ffm diverThe modern scuba world is one of excitement, adventure, exploration, and enjoyment. Every day people take to the water to see new things or enjoy a different environment from the norm. Despite this trend, there are a select few individuals who choose to dive in order to serve their communities. These divers are willing to get wet despite harsh conditions, limited or no visibility, and dangerous environments. Essentially, when a truck containing hazardous materials experiences an accident in the middle of a snowy winter night, there are people out there who are willing to attempt to rescue or recover the driver. These problematic diving conditions suggest that public safety divers must work to remain safe and protected as much as possible. One of the primary items that can add to a public safety diver’s protection is the full face mask. Within the public safety diving community, full face masks have largely replaced the standard recreational scuba mask in both training and operational settings. The following factors suggest why all public safety divers should love the full face mask and seek to utilize them to improve safety and operational capabilities.

 

  • Encapsulation

 

 

    1. First, the full face mask is an item that allows for the encapsulation of a diver’s face. If worn with a latex hood, the head and the soft tissues around the mouth, nose, and eyes will be protected. On those difficult days when a diver must submerge into unknown conditions and potentially hazardous materials, the chance of injury or ailment is reduced. This factor can provide protection from chemical contaminants, hazardous biological materials, and even cold. Similarly, fitting attachments such as spider straps ensure that a full face mask can be securely attached to the head of a diver and remain more secure when compared to a traditional mask with a single strap. The fact that a diver’s head is better protected can help to improve confidence, capability, and even response time.

 

  • Improved Field of Vision

Second, the full face mask provides an increased field of vision when compared to a traditional scuba mask. The large lens structure found in many full face units provides a wider, clear surface area than traditional masks, and therefore improved visual capability. In most scenarios, public safety divers may not have the luxury of clear, high-visibility water, but when an individual does have the ability to see, the greater the field of vision, the better a diver can search or make observations.

 

 

  • Communications

Perhaps more important than anything, full face mask units provide a resource that has not always been available to the public safety diving community. In years past, divers have relied on rope, hand, or tactile signals. Communications systems found in full face masks allow divers to communicate to not only other divers, but to the surface support team during an operation. This factor allows for complete discussion relating to scenarios, the provision of guidance, and the possibility of improved recognition during problem situations.

 

 

  • Breathability

Finally, a full face mask allows for unique and improved breathability. Essentially, a diver can breathe from his or her nose. During intense or difficult scenarios, a diver on a full face mask unit can take deep breaths through both the mouth and nose into the lungs. This factor can improve the ability to relax and remain calm during problematic situations.

 

The full face mask is a unique tool for any public safety diver. It allows a diver to communicate, gain improved visibility, and protect soft tissues. There is no reason that a public safety dive team should not use, care for, and promote the use of full face mask units in operational settings and training environments. A resource of this type can help to protect the life of an individual who works to assist others. Programs such as the ERDI Full Face Mask Operations Course can help any dive team learn to better utilize and employ full face mask units during operational activities.

-Dr. Thomas Powell
Owner/Instructor Trainer
Air Hogs Scuba
Garner, NC

Don’t Dive Cold When You Don’t Have To

Navy Experimental Diving UnitClarke JR1, Moon RE2, Chimiak JM3, Stinton R4, Van Hoesen KB5, and Lang MA5,6.
1 US Navy Experimental Diving Unit, Panama City, Florida
2 Duke University, Durham, North Carolina
3 Divers Alert Network, Durham, North Carolina
4 Diving Unlimited International, Inc., San Diego, California
5 UC San Diego – Emergency Medicine, San Diego, California
6 OxyHeal Health Group, National City, California

Introduction
The San Diego Center of Excellence in Diving at UC San Diego aims to help divers be effective consumers of scientific information through its “Healthy Divers in Healthy Oceans” mission. In this monograph we explore a research report from the Navy Experimental Diving Unit (NEDU) that is leading some divers to think they should be cold if they want to reduce decompression risk. That is a misinterpretation of the report, and may be causing divers to miss some of the joy of diving. There is no substitute for comfort and safety on a dive.

Background
In 2007 NEDU published their often-cited report “The Influence of Thermal Exposure on Diver Susceptibility to Decompression Sickness” (Gerth et al., 2007). The authors, Drs. Wayne Gerth, Victor Ruterbusch, and Ed Long were questioning the conventional wisdom that cold at depth increases the risk of decompression illness. After conducting a very carefully designed experiment, they were shocked to find that exactly the opposite was true. Some degree of cooling was beneficial, as long as the diver was warm during ascent.

Discussion and Implications
There are some important caveats for the non-Navy diver to consider. First of all, it was anticipated that a diver would have a system for carefully controlling their temperature during the separate phases of bottom time and decompression. Most non-Navy divers do not have that sort of surface support.

Secondly, the “cold” water in the NEDU study was 80 °F (27 °C). For most of us, 80 °F (27 °C) is an ideal swimming pool temperature, not exactly what you are going to find in non-tropical oceans and lakes. The warm water was 97 °F (36 °C), also a temperature not likely to be available to recreational and technical divers.

When testing the effect of anything on decompression results, the Navy uses their extensive mathematical expertise to select the one dive profile that is, in their estimation, the most likely to identify a difference in decompression risk, if that difference in risk exists. In this case the profile selected was a 120 fsw (37 msw) dive with 25 to 70 min bottom time, decompressed on a US Navy Standard Air table for 120 fsw (37 msw) and 70 min bottom time. That table prescribes 91 minutes of decompression divided thusly: 30 fsw/9 min (9msw/9 min), 20 fsw/23 min (6 msw/23 min), 10 fsw/55 min (3 msw/55 min).

A total of 400 carefully controlled dives were conducted yielding 21 diagnosed cases of decompression sickness. Overwhelmingly, the lowest risk of decompression was found when divers were kept warm during decompression. The effects of a 9 °C increase in water temperature during decompression was comparable to the effects of halving bottom time.

That is of course a remarkable result, apparently remarkable enough to cause civilian divers to alter their behavior when performing decompression dives. However, before you decide to chill yourself on the bottom or increase your risk of becoming hypothermic, consider these facts.

  1. Do you have a way of keeping yourself warm, for instance with a hot water suit, during decompression? If not, the study results do not apply to you.
  2. Of the many possible decompression schedules, the Navy tested only one schedule, the one considered to be the best for demonstrating a thermal influence on decompression risk. Although it seems reasonable that this result could be extrapolated to other dive profiles, such extrapolation is always risky. It may simply not hold for the particular dive you plan to make, especially if that dive is deeper and longer than tested.
  3. Most commercial decompression computers do not adhere to the U.S. Navy Air Tables; few recreational dives are square profiles. Furthermore, additional conservatism is usually added to commercial algorithms. NEDU is not able to test the effects of diver skin temperature on all proprietary decompression tables, nor should they. That is not their mission.
  4. The scientific method requires research to be replicated before test results can be proven or generalized. However, due to the labor and expense involved in the NEDU dive series, it seems unlikely that any experiments that would determine the relevance of these results to recreational or technical diving will ever be performed. As such, it may raise as many questions as it answers. For instance, the original question remains; if you become chilled on a dive, how does that affect your overall risk of decompression illness compared to remaining comfortably warm? Unfortunately, that question may never be answered fully.
  5. Thermoneutral temperatures for swim suited divers are reported to be 93 °F to 97 °F (34 to 36 °C) for divers at rest and 90 °F (32 °C) during light to moderate work (Sterba, 1993). So a skin temperature of 80 °F (27 °C) is indeed cold for long duration dives. If your skin temperature is less than 80 °F (27 °C), then you are venturing into the unknown; NEDU’s results may not apply.

In summary, beer and some types of wine are best chilled. Arguably, divers are not.

Acknowledgments
Support for the San Diego Center of Excellence in Diving is provided by founding partners UC San Diego Health Sciences, UC San Diego Scripps Institution of Oceanography, OxyHeal Health Group, Divers Alert Network, Diving Unlimited International, Inc. and Scubapro.

References
Gerth WA, Ruterbusch VL, Long ET. The Influence of Thermal Exposure on Diver Susceptibility to Decompression Sickness. NEDU Technical Report 06-07, November 2007.
Sterba JA. Thermal Problems: Prevention and Treatment, in P.B. Bennett and D.H. Elliot, eds., The Physiology and Medicine of Diving, 4th ed. (London: Saunders, 1993), pp. 301-341.

How Full Face Masks Benefit Tech Divers

Integrating a full-face mask into your equipment kit while technical diving can have enormous benefits in terms of safety and communication. It is very important you seek the proper training when using FFM for technical diving.

The World’s Best Wreck Dive Is…

TDI asked 3 accomplished divers what they thought was the world’s best wreck dive, and here is what they said.

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by John Chatterton
“I am incredibly fortunate to have had all the opportunities in diving that I have had. I have been to big steel wrecks like the Andrea Doria, the Lusitania, the Britannic, and yes, even the Titanic. I have dived and excavated wreck sites far more subdued, like the Spanish ship Concepcion, and the pirate wreck Golden Fleece. I have been part of finding and identifying more than a few wrecks, like the German submarine U-869.” Some of these wrecks have been very kind to me, while others have challenged me almost to the breaking point.
Continue Reading…
by Steve Lewis
“Not trying to cop-out of making a definitive choice, but this is an impossible question to answer. Well, not impossible perhaps but whatever choice i make today, it would be changed by next month or at least the next time I get the chance to dive on a wreck that I’ve never seen before.And therein lies the appeal of wreck diving… it’s the NEXT wreck that has the potential to top your all-time, best in the world list.“
Continue Reading…
by Mark Powell
“How do you choose the world’s best wreck dive? Well for me there are a number of criteria involved. I find that the more history that is involved with the wreck the more interesting it is. Equally, the better preserved, the more you can appreciate the layout of the wreck. While there are some very interesting smaller wrecks it is true that the bigger the better definitely applies to wrecks.“
Continue Reading…


by John Chatterton:
“Some men will never make divers. Any man can go down, I believe, but not every man can dive and accomplish anything. “ Tom Eadie – 1929

Tom Eadie was one of the US Navy divers deeply involved in the rescue and salvage operations of the S Class submarine disasters of the 1920’s. His autobiography was simply titled, I Like Diving. In peacetime, he won the Navy Cross while diving the submarine S-51 in 1926, and the Congressional Medal of Honor for his dives on the US submarine S-4 in 1927. He is not just one of America’s heroes, but he is one of my heroes.

I have always wanted to be that guy, the guy to accomplish something underwater. This is especially true on shipwrecks. I love the idea of the big dive. Not every dive is a big dive, but I look at every dive as a training dive, to get ready for the big dive, even if I am not sure where or when the next big dive is.

I always want to have goals, address the challenges in making those goals a reality, and ultimately accomplish something. By its nature, wreck diving is complex and challenging. How complex and challenging we make it, is up to us. Every new shipwreck offers original and interesting ways for me to challenge myself intellectually, physically, and psychologically.

To dive any wreck that is important to me, I don’t just want to know about the wreck, I want to understand it. What is the history of the ship, and the circumstances of the sinking? What can I learn about the it’s design, and how it was constructed? How might the ship have aged, since landing on the seabed? If the location of the wreck is known, what can other divers who have been there tell me? If the location of the wreck is unknown, where have others looked for the wreck, and why have they been unsuccessful? Where can I look to know more, about what to expect on the bottom. How can I look at the wreck in ways that will take me to places no one else has been?

For any wreck dive, I will need the education, equipment, and experience to make the dive happen. This is even truer for the big dive. If I don’t know what I need to know to understand the dive and the hazards it presents, then where can I learn all that I need to know in order to plan the dive? Perhaps some of what I need to know, is not really about diving, but about things that may relate to my diving? Education often requires a broad base.

If am educated enough to plan the dive, then what equipment will it require? I have made dives on wrecks while freediving. I dive on Air, Nitrox, Trimix, Heliox, rebreathers, surface supplied hardhat, and even submersibles. If I know about a particular wreck, and I know enough to plan the dive, what equipment will best help me to get down there and accomplish what I need to accomplish. Often, there is not just one right answer, or one wrong answer to a problem, and this is usually true in diving. Good decisions can involve personal preference based on any number of things including experience, resources, or team capabilities. I need to fully understand where I am going, and how to get there, to accomplish something.

If I am not already experienced in making dives similar to the ones I am planning, then I need to obtain the experience to not just make the dive, but to dive with the kind of confidence that can allow me to accomplish my goals. On the big dive, the diving has to come naturally, if not comfortably, allowing me to focus on the tasks at hand. Even armed with the experience and equipment necessary, I believe it is always important to make tune-up dives, prior to the big dive, to get one’s mindset right.

Physically, it is obvious that I will need to have the appropriate level of fitness to execute any dive. However, I also need the resources to make everything happen, when it needs to happen. I will need to have the cash, the time, and the energy to invest in any diving agenda. If I do not possess all that I need, then I have to figure out a way to get what I need, or simply pass on the dives.

Finally, if I am going to accomplish something underwater; do I have the courage, the discipline, and determination to do just that? Often, accomplishments do not happen as easily as we expect. When things are easy, and go as planned, anyone can be successful. When times are trying, will I have the mindset to continue, or not? These are the kind of rare situations which allow us the opportunity to show who we are, and what we are really made of.

I am incredibly fortunate to have experienced all the opportunities in diving that I have. I have dived wrecks all around the world. I have been to big steel wrecks like the Andrea Doria, the Lusitania, the Britannic, and yes, even the Titanic. I have dived and excavated wreck sites far more subdued, like the Spanish ship Concepcion, and the pirate wreck Golden Fleece. I have been part of finding and identifying more than a few wrecks, like the German submarine U-869. Some of these wrecks have been very kind to me, while others have challenged me almost to the breaking point. Still, wreck diving has been very good to me.

What is the best wreck dive in the world? Every wreck is unique, and interesting, with its own particular challenges, but the answer to me is obvious. The best wreck dive in the world is always, and has always been…… the next one. It is what keeps me exploring, and working, and diving. It is also most likely the only answer Tom Eadie would have understood.


by Steve Lewis:
Not trying to cop-out of making a definitive choice, but this is an impossible question to answer. Well, not impossible perhaps but whatever choice I make today, it would change by next month or at least the next time I get the chance to dive on a wreck that I’ve never seen.

And therein lies the appeal of wreck diving… it’s the NEXT wreck that has the potential to top your all-time, best wreck in the world list.

The truth is, I regard myself as a cave diver: a cave diver who happens to live a considerable distance from divable caves but really close to some stellar wreck sites, but a cave diver nevertheless. However, that said, in the past 20-odd years, I’ve had the chance to see some incredible wrecks: some of them virgin sites that have been visited by fewer people than the moon: others, regular stops for sport divers from all sorts of backgrounds and with varied tastes.

So, let’s go back to the question. As stated, my list of potential candidates is long, and I am sure to forget a few but here are some that come to mind right now as I sit on a Delta flight taking me home from Florida’s cave country. To keep this simple — and within the space TDI has allotted each contributor — let’s restrict this list to cold-water sites.

Steam Yacht Gunilda. Around 80 metres deep (260 feet), in Lake Superior. Notable because of the level of preservation due to cold water.

Schooner Cornelia B. Windiate. Fifty seven metres deep (just shy of 200 feet), Lake Huron. Another site notable for the preservation of the wreck and the number of historical artifacts aboard, and the near freezing water temperature at depth.

Wooden freighter SS Florida, close by the Windiate and similar depth and water conditions. She was carrying general cargo when she sank in 1875 bound for Buffalo, New York, and diving her and exploring her interior is like taking a swim through a late 19th-century general store. Remarkable as well for the artifacts preserved in her engine room.

The Cedarville, which rests at sport-diving depths in the Straits of Mackinac. An advanced wreck-diver’s dream; on its starboard side with so much to see inside (including a massive triple-expansion steam engine) that even after several dives, most have only begun to get an idea of what secrets she holds.

The bow and stern sections (yep, two different sites miles apart) of the formally 184 metre long (600 foot), Daniel J. Morrell, in Lake Huron. This wreck is deep, historic, tragic and awe-inspiring. This enormous steel freighter broke in two and went down in 1966 with the loss of 28 of her 29 crew. This is a very sobering site to visit with excellent photo ops for cold-water enthusiasts.

Then we might consider the “Long Point” collection of wrecks in Lake Erie. Any one of these half-dozen or so wooden vessels could be serious contenders, but let’s settle for the St. James: another intact schooner.

Or if we head east into Lake Ontario, we have to include the Hamilton and Scourge, two War of 1812 American merchant vessels pressed into military service by the American Navy and sunk by a freak wind storm while at anchor just off Port Dalhousie, Ontario at the western end of the lake. To be fair, these small schooners can only be added to the list as an addendum since both are protected heritage sites, and the Canadian government refuses to grant permits to divers to document what remains. However, although prohibited, a handful of divers have visited the wrecks, especially as rebreather technology has rendered their depth (slightly less than 90 metres or 280 feet), within the experience of scores if not hundreds of Great Lakes wreck divers. Features include a carved figurehead on the Scourge, cannons, muskets, pumps, rigging and navigation lights.

The St. Lawrence River carries the outflow of all the Great Lakes as their contents spills east towards to Atlantic Ocean. There are several neat wrecks in the river but the most exciting for my money is the Empress of Ireland. Several hundred kilometres downstream of the great lakes, the Empress settled in about 40 metres (130 feet) of ice-cold water within sight of Sainte Luce sur Mer, Quebec. Nick named, Canada’s Titanic, the Royal Mail Ship Empress of Ireland was an ocean liner outbound from Quebec City heading for Liverpool, England. Following a collision with the Norwegian collier SS Storstad in the early hours of 29 May 1914, she sank in 14 minutes and of her 1,477 passengers and crew, 1,012 died… the majority passengers.

I guess if I had to choose one on this list and one only, it would have to be the Empress. Even after more than 100 years on the bottom, she remains alluringly intact. Protected now, but formally picked over by souvenir hunters, she still keeps many artifact inside her labyrinth of corridors, storage areas and cabins. Probably one of the toughest “shallow” dives in North America, visitors have to adapt to strong variable currents (the river here is tidal), challenging visibility, seriously bone-chilling water, and many, many places to get turned around and lost. The reward is to visit a truly remarkable historic site that is a pinnacle wreck dive, but that is within a short boat ride of comfortable hotels and fantastic little French restaurants!

Now, there’s a bunch of options listed above and all of them just in the Great Lakes Basin. Conspicuous by their absence are literally thousands of cold-water wrecks off North America’s east coast, from Newfoundland to Southern Florida. We have not touched European cold-water sites including the amazing wrecks found in the Baltic Sea.

And then of course, we could move to warmer water, such as Truk Lagoon for instance.

OK, so here it is. My final pick… I believe the best wreck in the world is one I have yet to dive. My guess is that it lies in deep water off the coast of Malta… Anyone up for a trip to Europe!?


by Mark Powell:
How do you choose the world’s best wreck dive? Well for me there are a number of criteria involved. I find that the more history involved with the wreck the more interesting it is. Equally, the better preserved, the more you can appreciate the layout of the wreck. While there are some very interesting smaller wrecks it is true that the bigger the better definitely applies to wrecks. The environment where the wreck is to be found is also important as good visibility makes it much more enjoyable to dive as you can see the size and scale of a wreck. Finally if the wreck has not been dived hundreds of times by other divers and there is an aspect of exploration and discovery then this adds to the experience.

When you put all of these criteria together there is one wreck that stands out for me. HMS Hermes. There are not many diveable aircraft carriers in the world so diving any aircraft carrier is a special experience but diving HMS Hermes, the first purpose built aircraft carrier, is unique from a historical point of view. There had previously been a number of merchant ships that had been converted for use as an aircraft carrier but HMS Hermes was the first to be commissioned specifically as an aircraft carrier. The Royal Navy, despite a very traditional approach in many areas, was at the leading edge by ordering the first purpose built aircraft carrier in July 1917. She was laid down in January 1918 and launched in September 1919 and so was too late to be of any use in the First World War. She was finally commissioned in July 1923 and so didn’t see active service until the Second World War where she was based for much of her time in Ceylon, now known as Sri Lanka.

In March 1942 the Japanese Navy was ordered to carry out an aggressive raid on Sri Lanka and any British shipping in the area. Vice Admiral Nagumo, who was also responsible for the attack on Pearl Harbour, had a large fleet of aircraft carriers, battleships, cruisers and destroyers. On 9th April the Japanese launched their attack with more than 80 Japanese Zero fighter bombers attacking HMS Hermes. Due to a lack of fighter cover Hermes had to defend herself but despite opening fire with every gun it was clear that she was almost helpless against such an onslaught. Numerous bombs struck the ship and she sunk in less than an hour with the loss of the Captain, 19 officers and 288 ratings on board.

Diving HMS Hermes is an unforgettable experience. She lies on her port side in 52m/170 feet. At the bow, the anchor chains as well as the anchor are clearly visible. The decking has come away from the bow and it’s possible to see right into the focsle of the ship. A row of toilets are clearly visible together with an intact lamp fitting in the ceiling. Beyond this it is possible to see down through several deck and light penetrating through the hull shows that there is a hole in the hull a couple of decks down. Looking in through these holes gives a clear indication of the layout of the forward part of the ship.

The flight control tower is lying on its side having collapsed down onto the sea bed. Unfortunately this has crushed some of the structure and the decks below but it is still very easy to make out the layout of this area of the ship.

Towards the stern of the wreck, where the flight deck should be exposed, the wreck has twisted and is almost completely inverted so it is difficult to see the layout of the flight deck. However, this does mean that the propellers are much easier to see. The starboard prop is standing clear and makes a very impressive sight. The portside prop is partly buried in the sand and is only partly visible.

Despite obvious damage and the collapse of the flight deck there are areas that are undamaged and look almost as they would have when the wreck sank. The control tower is almost intact showcasing gauges, complete with glass, are still present as well as a range of other fittings. Emergency lights are still in place with the light bulbs still preserved. Several of the guns stand proud of the hull with lockers full of ammunition next to them as if ready to be used in battle.

You cannot dive this wreck without thinking of the men who served, and in many cases died, on this wreck. The wreck serves as a museum to this unique piece of history as well as a monument to the men who perished on her. I hope that anyone who dives this wreck takes the opportunity to remember these men and treats the wreck with the respect it deserves.

The visibility in the area varies from good to fantastic; the worst it gets is 15m/45ft visibility but on some dives we could see the wreck from the surface. The wreck is also home to a large variety of marine life. Large tuna, grouper and jacks flock around the wreck as well as a huge number of other fish. Some of these are an impressive size with one grouper being considerably larger then me. Some of the tuna are also a very impressive sight. As well as the fish a huge variety of coral and other marine life means that there is significantly more life on this wreck than on the vast majority of reefs. Moray eels and even sea snakes also inhabit some of the more remote parts of the wreck.

Despite being an incredibly important historical wreck HMS Hermes has lain almost unknown until recently. This was because between 1983 and 2009 Sri Lanka was ravaged by a vicious civil war which had meant that the Hermes was inaccessible to divers due to the political situation. Since the end of the civil war it has finally come possible to dive her.

Despite the end of the civil war it was still a major effort to get to the wreck. Sri Lanka is a ten hour flight from the UK which is followed by a seven hour bus journey to get from the capital Colombo to Batticaloa which is the nearest town to the dive site. This all adds to the sense of uniqueness and adventure. Above the water Sri Lanka is an amazing country with a huge variety of history, culture, landscape and excitement. The setting adds to the historical interest and the state of the wreck to produce one of the best diving experiences in the world.

Effective Preparation for Every Dive

by Rob Bradish:
Divers preparing equipmentAhhh, the thought of buried treasure!! I would be willing to bet that if I were to interview a thousand divers, at least one or two became involved in diving because of some story they had once heard about finding buried treasure! I remember one such story being Peter Benchley’s, “The Deep,” in which they describe the famed “Three Lock Box.” Such a box was kept for only the most important items and required three separate keys, maintained by three separate individuals, to be opened. This insured that the property owner would receive the property to which he or she was entitled. In comparison, a “three lock box” can also be an effective metaphor for dive preparation.

So often when thinking of dive preparation, the diver may limit his or her self to pre-dive gear packing and the planning discussion that goes on during the ride to the dive site. However, if someone is to be truly prepared, there is much to do long before the day of the dive. In fact, when examining preparation, there seems to be three clear keys to Effective Preparation for Every Dive.

From a personal perspective, the first key has to be mental preparation. Preparation of this type extends far beyond using a computer to pre-plan your time at depth 50 minutes from now, and requires some steps to effectively get there. For example, the diver must recognize his or her own capabilities. Is the dive being considered within the realm of the diver’s training? Is the site a new site or one dove many times in the past? Does one have all of the appropriate skills, tools, and techniques to complete the dive safely? Participants in some activities are encouraged to visualize, a process of mentally walking through the event, attempting to identify possible challenges or areas where an incident may occur. The night before a dive, visualization can help one determine choices for gear while packing. On the ride to the site, visualization allows the diver to prepare more directly, while witnessing environmental issues that will likely affect the dive. Without this kind of mental preparation, a diver cannot just say they are ready to dive on any given day.

Few people look forward to loading and unloading heavy gear. Hauling tanks back and forth from a dive vessel, or climbing back on board a boat using a dive ladder can require a lot of effort, making physical preparation the second key. While much of that preparation should occur months and weeks before a dive, through exercise, skills practice, and healthy habits, it continues right up to the day of the dive. Frequently, a dive actually begins with a drive to the departure location, either the morning of or the night before. Eating a healthy meal, hydrating effectively, and arriving well-rested are all part of physical preparation. The fact is, staying up until 2 am the night before drinking beers with friends might seem like a great start to a weekend, but not to a weekend of diving. Knowing such activities lead to the increasing probability of DCS incidents, it just doesn’t make sense. Knowing there is another diver, who may depend on his or her buddy, makes it even more important to be able to perform at optimum levels.

Obviously, gear preparation is something that cannot be overlooked and it is our third key. Scuba diving is called a gear intensive sport for a reason. The fact is people do not have gills, and if we are to enjoy what the marine environment has to offer, then equipping ourselves to exist in that environment is important. Annual maintenance is vital to safe diving, if only to insure the life support equipment is performing to standard. Trying to verify gear functionality on the way to a dive site however, is not preparation. Many find it effective to “flat diver” the gear before packing. Essentially, one would lay everything out and make sure that everything needed for the day’s dive is ready. In contrast, the only way to verify regulator and buoyancy compensator functionality is to assemble and test each delivery and exhaust point. Batteries and bulbs need to be fresh in lights and computers. Surface marker buoys and lift bags should be clean and ready to deploy. Finally, is the “Save-a-Dive” kit adequate to actually save the dive? Will the spare mask and fin straps work properly with the gear being packed?

While “plan the dive, dive the plan” has been a part of the diver mantra since the early days, it is important to note that such planning begins long before the day of the dive. Effective mental preparation, through training, research, and visualization are all key components. Physical preparation with effective exercise and living habits are also key. Finally, equipment preparation, not only in maintenance of equipment but in its proper selection for its anticipated use, is the final key. Only with all three keys, can we effectively unlock the “three lock box” of dive planning. Only at this point can the diver effectively determine the goals, depth, and duration for the dive. Even the seemingly simple tasks of entry and exit need to be planned.

Finally, never forget the post dive plan! It would be a shame to go through all of that preparation and planning, failing to include a stop at the local tiki hut for a meal, libations, the telling of lies, and sharing of discoveries!!

Safe Diving!


Rob Bradish, who refers to himself as “a recreational diver with technical Interests”, has been diving since 1981, crossing over to “the Dark Side” as an instructor with SDI/TDI. He works as an independent contractor through Air Hogs Scuba, of Garner, North Carolina and Blackbeard Scuba of Southport, North Carolina.

Dive Computers – A Beginners Buying Guide

by Joe Stellini:
personal dive computerYou just finished your Open Water Scuba Diver Course and your head is spinning with all the knowledge and skills you have learned. At the top of your list is purchasing what your instructor may have said was the most important piece of dive gear you could own – a dive computer. Your question is, “Why? What is so important about a personal dive computer (PDC) that I should own one?” Most likely that question was answered for you, but here is a little reinforcement to what your instructor may have told you.

First, not everyone wants a fancy, all the bells and whistles PDC, and there are a lot of options out there. Sometimes simplicity means more enjoyment on your dive instead of trying to figure out exactly what you are supposed to be paying attention to on the screen. So getting down to the basics means that there are three things you absolutely need to know during your dive and how to access them on your PDC. They are: Where are you now? How long have you been there? How much longer can you safely stay? This translates into depth, elapsed dive time (EDT), and no decompression limit (NDL). All dive computers have these features, but it’s ease of use and readability that are most important. Everything else is just extra.

To break it down even further, here is why these things are important. Depth obviously comes first because when we plan a dive, depth is one of the first things we set a limit on. Diving within the agreed upon depth limit, whether it be with the Divemaster, your dive buddy, or with yourself on a solo dive, will keep things organized. Not sticking to your planned depth can be confusing and dangerous to all involved. The easiest way to monitor your depth is to learn how to process that information with a quick glance at your computer, often, throughout your dive. If the PDC happens to have an alarm to remind you, even better.

Second on the list, is elapsed dive time. You ask, “Won’t the Divemaster be leading us in and out of the water?” The answer is, “In a perfect world, yes. However in the slightly imperfect world we live in, that does not always work out.” What happens if the group doesn’t want to see what you and your buddy want to see? Or what if you get separated? Or even more common, what if you become too experienced to hang out with a bunch of newbies? You will have to monitor your own time during the dives. Again, an audible alarm for this feature helps. Most dive operations set a maximum dive time and part of being a good diver is following the dive plan whether you or the dive operation set it.

Finally, we have our no decompression limit; last, but far from least. Some computers have audible alarms for this feature as well. When it comes down to it, not following a good dive plan with regard to our two previous features, depth and EDT, could result in decompression illness. Going too deep, coming up too fast, and staying too long, will eventually and most certainly catch up with you. Yes, DCS has been drilled into your head during your open water class and will be addressed even further during any advanced or continued education courses you may take.

So why is NDL important? Because it takes your depths and times during each dive or repetitive dives and calculates how much longer you can safely stay at your current depth. Breaking these rules could cause the loading of too much nitrogen resulting in a mandatory decompression stop. As a new diver, we want to avoid a deco stop at all costs. Your PDC can tell you when to move to a shallower depth, will recalculate your NDL for the new depth, and will do this every single time. Not only does this keep you safely within your nitrogen limit, but it will significantly extend your dive times allowing you to multi-level dive. You can’t get that with dive tables.

The personal dive computer you used in your SDI course was probably attached to the regulator system. If you are not interested in the whole package then consider a wrist-mounted computer. This makes traveling with a PDC lightweight and easy.

On a final note, always remember to monitor your air. Although some PDC’s may be air integrated, divers that do not use one will have to check their pressure gauge every few minutes.

For more answers on personal dive computers please consult with your local SDI Dive Center. They are there to help and provide you with the best customer service possible and should be able to answer all of your questions on personal dive computers.

Do You Call Your Dive Shop Home?

##Diving is a sport that brings us all together. No matter where a diver may end up, that person can always find friends among other divers at a local watering hole at the end of the day. This type of relationship is one that many would call a “family.” These people will laugh with you, joke with you, and even help you in bad times, even if they have just met you. These supportive emotions are often built at home through interaction with the local dive shop. Every evening at shops around the world, men and women get off work and swing into the dive shop just to see what is up or what new gear has arrived. At certain times, dive shops may even have trouble getting work done because customers are too busy socializing within the store. The dive shop is a place to escape worry, avoid problems, and even daydream about scuba diving. For any business, disruption of this type is a good problem to have.

Air Hogs Scuba

At Air Hogs Scuba, the dive shop is without a doubt a second home for everyone who walks in the door. The staff members openly joke around, pick on customers, and certain customers even swing by every day just to eat lunch while working sales routes. The dive shop is a place to “get away” and be among friends. When a new face shows up, he or she is treated like an old friend. When the door opens, exclamations of welcome are yelled out and smiles can grow on the hardest of faces. Gender, race, creed, nor the background of any individual matter to anyone. Each person is either a diver or someone seeking to start a new adventure. Like interests and shared excitement for the water are the only factors that seem to matter.

When a shop friend or employee seems to be having a bad day, the others ask if any help can be provided and efforts are made to lift the spirits of everyone. After all, “any day diving (or at least being near diving) is better than a day where you don’t dive.” Air Hogs Scuba is a place where stories are shared and bonds are developed. The divers trust each other under water, so land-based living in the shop comes easy. Relationships of this type are how families are built and there are not many communities stronger than one made up of divers. The staff at Air Hogs Scuba takes pride in its little “family” and works every day to grow it just a little bit bigger.

– Submitted by Air Hogs Scuba of Garner, NC
www.airhogsscuba.com/

Tech Dive Center

Located in the mountains of Virginia, six hours from the Atlantic Ocean, with no active dive club presented a daunting proposition to start a dive shop. However, after a four-year effort that was seeded with a basement full of dive gear, some great mentors, a true passion for everything diving, and most importantly a business mission to “Build a Dive Community”, Tech Dive Center is now the “Dive Shop Home” to hundreds of divers in the New River Valley near Virginia Tech in Blacksburg, Virginia.

It was this mission statement; “…to build a dive community” that has kept us focused on a long-term goal of supporting our business with the creation of a sustainable group of active, safe, and fun-seeking individuals who are very passionate about scuba diving. The most important aspects of our community-building efforts?

  • Full Moon Socials – Every full moon the dive shop hosts a social event with 30-50 people in attendance. Instead of a certain day of the month or week, we let the moon cycle dictate the date so that over the course of a year most people can attend most events. These are either potluck or sponsored by a customer who volunteer to buy or make a great spread of food. We discuss past adventures, future trips, and enjoy an evening amongst peers.
  • Independent Clubs – The dive center provides support for two clubs who keep individuals engaged during extended surface intervals. A local university club was revived and caters to college students. Another which we started from scratch, and meets before the full moon socials, is lead by local residents.
  • Mixing sport and technical divers – Avoiding cliques and enabling everyone to interact is always a challenge. Our solution is to plan training and trips that are interesting to both sport and tech divers. We cater to all experience levels and are inclusive of everyone’s budget, schedule, and passion. Divers are exposed to a variety of specialties, but more importantly the people who are most passionate about that type of diving is the one selling it, instead of a shop employee.

Divers seek out other divers and converge at a location that reminds them of the most recent dive adventure. All divers need that location at which to congregate. If not, they lose steam, forget how awesome the last dive was, crucial skills disintegrate and the once avid diver no longer dives. Typically this local mecca is the same place they get gas fills, purchase new equipment, and received their latest certification card. Dive shops not only provide areas with equipment, service, training, travel and rentals but most importantly, dive shops provide community. This is vital for both inland and destination areas because it introduces us to new buddies and sets up the unique culture of the dive world.

– Submitted by Tech Dive Center of Blacksburg, VA.
www.techdivecenter.com/

DJ’s Scuba Locker

What are we all about? Customer Service! We have never stopped being customers.

We have built relationships with our customers with this philosophy: It is not about short-term profits and numbers; it is all about long-term relationships.

While we have to work around internet sales and information, the lack of customer service always brings people back to DJ’s. Although price is sometimes a factor, you cannot put a dollar value on customer service, experience and a satisfying outcome. For example, the DJ’s SDI Scubility Program supporting our Military and Challenged Kids delivers that positive experience and satisfying outcome. This is a way for our customers to be involved, work with those who need assistance, and feel a connection to the DJ’s Team. This is our way of paying it forward, and it is their way of being a part of our dive community.

In the short-term, customers become friends and in the long-term, they become family, and the dive shop becomes their home.

– Submitted by DJ’s Scuba Locker of Brookfield, IL.
www.djscuba.com/