Freediving in the Maltese Islands has lots of wonderful features that make it spectacular; the stunning underwater visibility of up to 40m, the cliffs and caves that are prevalent across the islands, the deep blue colour of the water that is unique to the Mediterranean Sea. But one thing that really draws freedivers to Malta is the chance to dive on ship wrecks. Malta has a LOT of wrecks, some sunk by nature (storms), by humans (wars), or on purpose to create artificial reefs. The P-31 wreck falls into the latter category.

Since being purchased by the Maltese Tourism Authority and sank as an artificial reef attraction for divers, the P-31 now sits upright on the sandy seabed West of Comino( just South of Blue Lagoon and just West of Crystal Lagoon), approximately 200m from shore. The depth on the bottom here is 20m and the top of the wreck is at just 10m deep. In fact the P-31 sits so shallow that it was necessary to cut off the mast of the ship before sinking her so as not to obstruct boat traffic. The wreck can often be seen clearly from the surface when you arrive by boat and I have even seen it occasionally from out of the airplane window when arriving or leaving Malta on certain days! In the summer months you will see a yellow ‘X’ marker buoy above to indicate the wrecks position.
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Since her sinking, the P-31 has had to weather some rough storms as the prevailing winds on the islands are from a NW direction and sitting this shallow in the water means that waves and swell have had an impact, but considering that she has been underwater for 10 years already the wreck is still in very good condition. Before sinking she was thoroughly cleaned and made safe for divers. This means doors and hatches were removed and obstructions such fixtures, wires and cables were cleared out. There are a number of levels to explore and for a freediver it is normally clear and obvious which direction it is possible and safe to go in.

Those of you following One Breath Freediving on your social media channels will already know that I have been using the Paralenz dive camera quite extensively already, for both photos and videos, so for this review part 2 (part 1 is un-boxing and initial impressions),I wanted to look at it's use in the water. More than numbers such as pixels and frame rates, I wanted to discuss it's functionality and how well it works specifically from a freediver's point of view. 

Firstly, it's primary mount method that I have employed so far with the Paralenz dive camera has been the mask mount. For me this has been the most convenient as I am normallly using it while teaching or guiding. Once the mask attachment is threaded to the mask strap, you clip the camera on using the 'T-Rail' mount system that gives a reassuring double 'click' when properly secured.

The first thing you notice while wearing it in the water is.....that you don't actually notice the camera! Despite feeling substantial and solid when held in the hand, once attached to the mask I can honestly say that I forget that the camera is actually there. Being so non-intrusive is a huge plus for freedivers as we take in the water minimum equipment and definitely don't like things that create drag or resistance.

Functionality from this position is another massive plus. The feedback loop of vibrations of the camera unit, mean that you do not need to remove the camera (and mask) at all to know what setting you are in! For example, rotate the selector ring clockwise while turned on gives one vibration for video, two vibrations for camera, three for settings etc. And then long or short holds of the activation switch can start or stop recording or offer other functions. This creates a simple user and selector operating system and excellent hands free usability.

Now lets look at the quality of photos that Paralenz is capable of (for videos, check the OBF YouTube channel). All the snaps in this review were taken from the mask mount position, so just a reach to the side of the head and a short pull on the activation switch can give you some great photos. While primarily a video camera, the photos are surprisingly clear, sharp and lacking in distortion at the edges (as can be common for extremely wide angle cameras). In these photos I had Depth Colour Correction (DCC) turned on and Depth & Temperature overlay turned on. The photo above from 5m displays nice blue water and clear white logos on the wetsuit hood. The first photo handles the reflecting light from the shallow water very well and also created a shot that is not blurred or distorted from the divers movement.

Initial in water conclusions:

• Mask mount is very useful for hands free use
  
• Unit vibration feedback is a great idea and super useful with mask mount 
• Photos lack distortion and are very sharp
• DCC is perfect for multiple depth change diving (such as freediving)

Look out for part three of the test where I will review the features of the Paralenz App.

There can't be many places as alluring and iconic to freedivers as the Blue Hole in Dahab. With imposing, barren mountains just metres from deep blue water and a kaliedoscope of colours amongst the corals on the reef with every shape and colour of fish possible, it is a truely beautiful place and draws freedivers from accross the world.
A natural submarine sinkhole, the depth within the hole is 100m and just outside, on the reef's edge, the depth reaches over 1,000m. A sheltered location and lack of current just metres from shore means that this is a wonderful place to train for freediving.
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One Breath Freediving will be conducting a Training camp in in Dahab Egypt in January and February 2019. Enquire for further information.

One of the questions I get asked most frequently as a freediving instructor is about HOW we can hold our breath longer. What is the 'trick', the 'secret' that can make it easier for us to be underwater deeper or longer. What many people don't realise is the the human body already holds most of the answers!

Here is an overview of the four main diving responses of the human body, collectively known as 'Mammalian Diving Response' (MDR):

Peripheral Vasoconstriction
Trigger: Breath-holding, facial immersion in water, increased pressure
Response: Blood vessels in the extremities of the body (arms, legs) constrict to keep blood prioritised for the vital organs of the body
FACT: A disadvantage of reduced blood flow is increased carbon dioxide and lactic acid build up, but tolerance to these can be increased through training

Bradycardia
Trigger: Facial Immersion in (cold) water, breath-holding
Response: Heart rate slows down by 10-25% in untrained, or up to 50% in trained freedivers, thus conserving blood Oxygen
FACT: In diving seals, heart rate has been measured going from 125bpm to below 10bpm during a dive!

Spleen Effect
Trigger: Breath holding and increased pressure on repetitive deep dives
Response: The spleen contracts and releases more red blood cells which aid oxygen transportation in the blood
FACT: The spleen is not an essential organ, but holds a reserve of blood and is important as part of the bodies immune system

Blood Shift
Trigger: Increased pressure on deeper dives
Response: Blood plasma swells the alveoli of the lungs filling the chest cavity area to prevent barotrauma injury from increased pressure at depth
FACT: Only as recently as the 1970's did scientists begin to understand this phenomenon once divers such as Enzo Maiorca returned from 50m+ dives, injury free!
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Sign up for AIDA3 (Intermediate) Course at One Breath Freediving to learn more about the Mammalian Diving Response and to reach new depths underwater.

The 2015 'In Water Photographer of the Year' competition is now accepting public voting to decide an overall winner! Category winners are announced for the photography competition that is for freedivers, snorkellers, swimmers and others in the water without using breathing apparatus.
Vote by clicking the link below and deciding how many stars to give your favourite photographs. It's that easy!
http://www.inwaterphotographeroftheyear.com/2015-vote

"Ascent" - Photograph by David Watson