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Book Review: Freediving — The Book of Freediving

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About the authors:

Kimmo Lahtinen, AIDA education committee 2005–2009, AIDA president 2010–2016. Freediving qualifications: AIDA instructor trainer and A-level judge.

Simo Kurra, AIDA education committee 2007–2009, the “father” of AIDA IT systems: EOS, CARS, JOS, AAT. Freediving qualifications: AIDA instructor trainer.

Ari Nissinen, D.Sc. (Tech) and freediver.

cover‘Freediving’ is a 159 page book designed for a reader wanting to take their skill set and understand their bodies beyond the level of casual snorkelling. The suggested training plans at the end are designed to take the reader to a high level of competitive diving.

The authors are extremely experienced Freedivers, and the Bibliography not only shows the amount of research gone into the book, but also gives the reader many avenues for further in depth reading around the subject.

One of the first things you notice when you pick up the book is that it is a quality product, and a quick flick through you can see that it is well presented with good use of pictures and separate text boxes for key points.

The scope of the book covers a brief history of Freediving. It covers diving physics and physiology, safety and rescue and a good section on nutrition. It then breaks the skill set of Freediving down into pool and open water freediving. It certainly guides the reader towards competitive diving, whilst discussing recreational diving and its merits.

p68The book reads like a breath of fresh air. So many times I’ve sat down to read something on the sport of freediving that is littered with blatant misinformation from a lack of understanding by the author. I’ve especially noticed this problem in mediums like magazines, newspapers and forums. There are many nuggets of useful information, which really can only be explained by experienced Freedivers. Advice and direction that is obvious to the experienced diver is often missed on forums and magazine articles; these are true Freedivers talking about their sport and trying to get their points across like a good coach would in a session. It is worth reading a section more than once so you don’t miss these important parts.

There are many in depth descriptions of pool and open water diving skills which are excellent – they give a really good overview of many of the types of equipment choices we have, why we would make them and then good descriptions on how to execute good technique. One part of the book I wasn’t completely comfortable with was the section on packing and mouthfill. It was only skimmed over, but I would prefer to designate an entire teaching to the subject and the pros / cons and also the potential injuries that could be caused from improper use. The author almost convinces you to not practice packing, and mentions that it is potentially fatal, but does overview the skill set so now the reader can go away and practice. This is the one skill that could really pose problems, even dry. I think a larger section in the book, if it is to be covered at all, would have been better.

p36Immediately after that section however is a good sized chapter on safety, a chapter I have rarely seen given so much time in any other book, so this is a good thing. It really highlights many of the systems we have so the reader is under no doubt of the need for full safety systems in place rather than risking solo diving or being looked after by a casual unqualified observer.

Clearly these authors are proponents of the philosophy I adhere to. Repetition of skills and depths, consolidation, relaxation and comfort, and enjoy to achieve. I almost feel this has become an old school philosophy but hope it isn’t lost. This philosophy is reemphasised throughout the chapters.

‘Obsessive pursuit of personal bests easily leads to near-miss situations and even blackouts’

In short this is a useful book for beginners, and intermediate Freedivers. It is also a great resource for use as course material for various types of class and training situations. Worth the money, a good read.

You can source it here: www.freexperience.com/freediving-book.html

And Amazon here.

The E-book is available for ipad and Android users. Kindle version in progress…

Steve Millard is a leading UK based AIDA and PADI Freediving Instructor Trainer who is the owner of Apneists UK freediving group - www.freedivers.co.uk. Currently Press officer to the British Freediving Association and Performance mermaids lead coach.

Marine Life & Conservation Blogs

Sharks the Ocean’s Greatest Mystery – Part 2

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Sharks are an incredibly significant animal in human culture of both the past and present, they are an animal that have been embodied in our culture for millennia. They are represented in formats such as books and clothing, but most notably in our TV and films, which is where a large portion of their negative reputation stems from. A popular TV representation of sharks comes from Discovery Channel’s ‘Shark Week’, and I believe sharks are possibly the only animal on our planet to have an entire week dedicated to them every year. However, despite this, we still know more collectively about the surface of the Moon and Mars, about Galaxies outside of our own, and even about animals that have been extinct for millions of years, than we do about sharks.

Sharks are our Ocean’s top predator, and they represent just how little we know about our blue planet. We have put more money into exploring outer space than we have exploring our seas and whilst many people call space the final frontier, I believe the final frontier is our Oceans. There are people that have lived in space for over a year, yet we aren’t able to stay underwater for more than a few short hours, and with each dive, scientists are discovering something new in the deep sea, giving us a better understanding of our oceans and the top predator that lives within them.

What we do not know

It is easier to talk about what we do not know and the implications of not knowing it, we still don’t know where most shark species mate or give birth, knowing this would accelerate conservation efforts for sharks in a huge way as these areas could then have realistic protections placed on them, allowing us to preserve key stages of the Sharks life cycle.

Marine Biologists have stated that the discovery of a White Shark breeding ground would be the holy grail of Ocean Science, but the only reports of White Sharks mating come from a handful of sightings from Fisherman and Sailors, so these cannot be used as an official record.

We know that Sharks mature late in the same way as us humans, it is estimated that some species are estimated to not be sexually mature until their late 30’s and 40’s, which means that these species are at extreme risk of disappearing due to fishing, as they aren’t able to replenish their numbers fast enough when put under extreme fishing pressure. There is a lot of debate over whether Sharks mature at a certain age or a certain size, for example it was estimated that White Sharks mature at four metres in length, however, in South Africa in 2017 a female White Shark was killed by Orcas, and it was determined that she was either immature or hadn’t mated, as there was the presence of a Hymen.

We are also still unsure about the impacts of human activities on Sharks and how losing Sharks, or their habitat, would affect the habitats and environments on land, environments in which we depend on for our survival.

What we do know

New Shark discoveries are made every year, and scientists are predicting that in the next 15-20 years we will be entering the golden age of ocean and shark discoveries. We already know that sharks are the oceans top predator and we have determined that they affect the very mechanics and functions of the Ocean, if we were to remove them, we would be putting the worlds ecosystems at risk of collapsing. Sharks are an integral part of the balance of the oceans, they help by controlling populations of other species, if we were to lose sharks, species such as turtles would have an increase in population, therefore leading to more seagrass being eaten, which is a prime food source for many animals. Thus, other smaller animals would not be able to feed, and their population would decrease, also the decrease of sea grass would affect us humans on earth as the oceans plant life helps to absorb carbon dioxide and create oxygen, and actually up to 75% of the oxygen we breathe is created from the oceans.

We know that some Shark species have complex social relationships that aid in their survival, although this has only been observed in a handful of species. Lemon Sharks form bonds as pups and hunt together in the shallow mangrove swamps of the Bimini Atoll, and will learn and hunt together and learn vital skills needed in their future survival. Hammerheads are possibly the most famous for social interactions as they form huge schools off places such as the Galapagos Islands and it has been observed that the more dominant females swim in the centre of the school and display for the males.

Some shark species, such as the Zebra Shark, have been known to mimic other animals. Zebra sharks are born with stripes (which fade as they get older) and they have the second longest tail (after the Thresher Shark), this helps them to mimic the highly venomous, White-Banded Sea Snake in order to trick predators into avoiding them, they have even been reported to mimic taking a breath at the surface like a sea snake would do.

It has recently been discovered that Greenland Sharks are now the longest lived Vertebrate on our Planet, they are believed to be able to exceed the age of 500, with females not reaching sexual maturity until they are around 150 years old. This was discovered by examining special proteins in their eyes that do not degrade with age. Determining age and sexual maturity are crucial for understanding and managing shark populations as knowing what age a Shark can breed will allow us to gauge what protections a species needs.

It has recently been discovered that female Whale Sharks are able to store sperm to use over a period of time, this is in order to ensure their chance of reproducing, even without recently mating. This is a huge advantage for conserving the species, as Whale Sharks are classed as an endangered species and so, with the number of whale sharks declining, this ensures the species can continue. Along with this, Whale Sharks have also been found to be pregnant with up to 300 pups, and these pups can be at different stages of development due to the staggered use of stored sperm.

Of all things we know there is one thing that is certain, a Shark, no matter the species, is unique and worth more to our world alive than dead. In the next blog we will explore the threats that Sharks face and how we can help Sharks through the tough times ahead.


Follow Donovan on Instagram at www.instagram.com/donovans_reefs

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Nauticam NA-α1 Housing for Sony α1 Camera now shipping

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The Sony α1 is the company’s flagship full-frame interchangeable lens camera.  Designed around the new 50.1MP Exmor RS BSI CMOS sensor and the BIONZ XR processor, the α1 is truly a camera which can do it all.  It’s 759 point Fast Hybrid Autofocus system offers advanced subject tracking and real-time eye autofocus on both humans and animals.  The optimized processing within the α1 allows it to achieve 30fps continuous shooting at full resolution along with 8K 30p and 4K 120p 10-bit video recording.

Nauticam has supported the Sony Alpha full-frame line since the original a7 with professional grade aluminum housings that offer intuitive access to all the controls and functions of the cameras. As the cameras have evolved, so have the Nauticam housings. The NA-α1 underwater housing provides fingertip access to all key camera controls in a rugged and reliable aluminum underwater housing. Ergonomic camera control access is one of the defining strengths of a Nauticam housing, and the NA-α1 continues this tradition.

Integrated DSLR-housing styled handles with ergonomic rubberized grips and stainless steel stiffening brackets add stability and accessory mounting points. The NA-a1 also features dual rear thumb-levers that are easily reached from the handle that access three of the most-used controls on the rear of the camera. The right lever actuates the AF-ON and RECORD buttons while the left lever is mapped to the PLAY button.

Atop the housing on the left side are controls in the form of a MODE dial and FOCUS mode lever. The C1, C2 buttons as well as the EV compensation dial also have direct access from the top of the housing. The C3, which is typically assigned to control switching between the EVF and the LCD screen is easily reachable on the rear of the housing from the left handle.

For more information visit the UK Nauticam website by clicking here 

or to visit the USA Nauticam website click here.

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Competitions

Explore the amazing triangle of Red Sea Reefs - The Brothers, Daedalus and Elphinstone on board the brand new liveaboard Big Blue.  With an option to add on a week at Roots Red Sea before or after. 

Strong currents and deep blue water are the catalysts that bring the pelagic species flocking to these reefs. The reefs themselves provide exquisite homes for a multitude of marine life.  The wafting soft corals are adorned with thousands of colourful fish. The gorgonian fans and hard corals provide magnificent back drops, all being patrolled by the reef’s predatory species.

£1475 per person based on double occupancy.  Soft all inclusive board basis, buffet meals with snacks, tea and coffee always available.  Add a week on at Roots Red Sea Resort before or after the liveaboard for just £725pp.  Flights and transfers are included.  See our brochure linked above for the full itinerary.

This trip will be hosted by The Scuba Place.  Come Dive with Us!

Call 020 3515 9955 or email john@thescubaplace.co.uk

www.thescubaplace.co.uk

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