Connect with us
background

Dive Training Blogs

Scuba diving courses – Six things you were told that ‘just ain’t necessarily so’

Published

on

Sometimes bad habits and half-truths find their way into all elements of our lives. Those small snippets of information that sound like they should work or you just assume that that’s the way things are done (have you ever put a spoon in an open bottle of champagne to stop it going flat in the fridge?)

Well scuba diving is just the same. It’s full a little quirks that have become either part of courses’ ‘folklore’ or have become a standard, de facto or otherwise. Well I have a list of a few that I know of – perhaps you have some of your own! I would love to hear them.

Drink water, not caffeinated drinks before and after a dive as dehydration is a leading cause of DCS

I can’t count the times that a well-meaning DM or instructor has offered me a drink of water right before or after a dive to ‘reduce my chances of DCS’. Whilst a cup of water is always welcome on a hot day, a single cup of anything is unlikely to affect my body chemistry enough to be the deciding factor in a bend. Maintaining a normal level of body fluid is something that needs to be an ongoing process that is difficult enough even when not diving. The best evidence is that severe dehydration is only one of a number of possible contributory factors to DCS and it may just cause symptoms to manifest themselves more acutely than they would otherwise. Monitoring the colour of your urine output (pale) is still the best guide to your pre-dive hydration and being mindful of all the factors you can influence to reduce your chance of a bend.

Don’t wear your mask on your forehead, it’s a sign of a panicking diver

James Sanderson Mask on head

No, a diver calling for help or splashing for attention or trying to stand on you is the sign of a panicking diver. A mask on the forehead is the sign of a diver making themselves comfortable at the surface if they so choose. I would be careful in a breaking swell as I don’t want to lose my prescription mask, but in still water after a cave dive for instance it can be a comfortable place to put my mask.

 

James Sanderson KnifeWear a knife on your calf

It’s essentially the worst place to hold a cutting device and can even become entangled in fishing line, causing the problem it’s there to solve. Somewhere around the middle of the body that can be accessed by either hand is best place to keep a small knife, line cutter or trauma sheers. It’s makes them easy to get at pretty much regardless of body position, be located by a buddy and cost a fraction of the cost of some ‘dive knives’ I see on peoples legs.

Always wear a snorkel

James Sanderson No snorkels

They have their place I admit it. That is in my kit bag.  OK so some agency instructors have to have one as part of their training standards, and you were probably sold one on your first course (can you see a connection there?) I see divers on boats where the snorkel is actually getting in the way and may cause a problem. If you need to surface swim, do it on your back. If you are at the surface at the end of a dive in a breaking swell keep your regulator in. Trust me, it’s OK to take it off now (see, no dive police).

Always surface with 50 bar in your tank

Why? What am I supposed to do with it? Does that tell me at what gas pressure I start back to the surface with? No of course not and that really  is the important pressure to know, when to START the ascent and head home (cave divers call it ‘turn pressure’). You need to know how much gas you AND a stressed buddy are going to need to make nice slow, safe ascent if you are sharing gas and it’s way more than you think (I will show you how to work that amount out in another blog).

Don’t go into deco

James Sanderson Decompression diving

Everybody who is diver and is reading this has made a deco dive. Think about it – by definition, if you are ascending and reducing the ambient pressure around you then you are starting to move the Nitrogen out of your body tissues; this is decompression. Ascending, off gassing, supersaturation and decompressing are all the same thing, it’s just that when diving within recreational ‘No decompression limits’ the amount of deco you have to do is less or the same as your ascent time without stopping. So the problem isn’t deco as such but there are three issues that a recreational diver does not have the proper training to manage (and are what technical training courses will start to cover). They are not knowing how long their ascent time needs to be based on their bottom time, at what depth they must make their stops, how long they have to be and most crucially if they have enough gas to perform that ascent. So unplanned deco is really our culprit… so get some training!

So these are my diving myths busted; there are dozens more. It comes down to being a thinking diver, constantly evaluating and questioning what is presented to you (as a ‘fact’ in diving is rarely every so).

 

Blog courtesy of www.divelife.com.

James has spent nearly 10 years teaching and diving in some of the world’s most enviable and challenging dive locations. He is an active trimix and cave diver and now has nearly 2000 dives in such diverse locations such as Caribbean reefs, Fjords in the Arctic Circle, submerged volcanoes in Coral Sea and the caves of Florida, Mexico and France and wrecks of the UK's south coast. He now teaches exclusively as a GUE (Global Underwater Explorers) instructor for TecLife (www.divelife.co.uk).

Dive Training Blogs

Deptherapy returns to its Roots – Part 4

Published

on

Join Richard Cullen from Deptherapy for part 4 of his Blog about the charity’s recent expedition to Roots Red Sea, El Quseir, Egypt.

We are all back to the house reef today; the weather is lovely, the sea calm, the tide will soon be slack, so a great day’s diving in store.

A few yards away from the beach dive centre, on the Roots’ beach is their day time restaurant. It is where we take lunch when diving, and there is a continual supply of tea, coffee and soft drinks, and some marvellous lunches.  There are also male and female toilets and a fully accessible toilet for those using wheelchairs.

A few thoughts around working with amputees and those who have paraplegia. Firstly amputees – the part of the limb remaining is known as the ‘stump’, and we have worked with a substantial number of bilateral leg amputees (both legs), single leg amputees and single arm amputees.  The level of amputation can be above or below the knee or elbow, or through the knee. In one case the amputation was transpelvic and in another through the shoulder.  Some like Chris Middleton have one leg amputated above the knee and one below the knee.  This is rare, but each type of amputation offers a different challenge.

Many people think the amputation is clean and the skin neatly tidied up after surgery. Although that occurs in a few cases, in most the stump is rather rugged.  Elasticity of the skin around the stump is often exceptionally poor and can easily be damaged.  Some of our beneficiaries, as they were injured as young men, suffered from heterotopic ossification – this is where the bone tries to grow after amputation and often penetrates the skin, resulting in further surgery being required to cut back the bone and of course the stump needs to be restitched.  Very often stumps are sealed with skin from elsewhere on the body.

Swars kitting up

Few divers have never experienced a graze or cut underwater but such an experience for those with amputations can have serious consequences.  Stumps are more likely to get cut or grazed as the skin is so tight. We all know that there are lots of infections in seawater and if infected the cut or graze can cause very serious problems for the amputee.  Tailored wetsuits are one preventative measure, as are daily stump checks, making sure there is no damage and if there is, applying medication and or protecting the stump.

Those with paraplegia provide an additional challenge, not being able to feel their lower limbs they can easily damage them, so cuts, abrasions, and even sunburn can go unnoticed.  Donning a full-length wetsuit can be a challenge as toes can easily be broken and hairs pulled out of legs.  On the Deptherapy Education Professionals’ Course we show how to fit a wetsuit properly.

In recent discussions between our dive medicine advisor Mark Downs and our VP Richard Castle, who is a consultant psychologist, we have been looking at areas for further medical research in terms of diving for those with disabilities.  One area of suggested study is thermoregulation. The theory is that those with amputations and those with paraplegia suffer more with the cold as their body is unable to regulate heat. Certainly, in Corey’s case, he feels the cold more quickly than those diving with him. Chris Middleton can feel the cold more quickly than others with amputations but that may well be that Chris is muscle and bone where, to put it nicely, others have a more substantial covering.

Some AMEDs and Dive Referees will not sign off amputees as being fit to dive. That is their professional opinion and although we can show that even triple amputees are more than capable divers, capable of progressing to Rescue Diver standard even, they still refuse to sign them off. Last year Oli and Mark invited us to speak at the UK Annual Hyperbaric Medicine Conference in London where Josh Boggi, the world’s first triple amputee Rescue Diver and a Deptherapy beneficiary spoke about how amputees can become safe and successful divers.

Corey, Swars and Michael

For Corey, he wears full leg coverings and diving boots in the water; as he cannot use his legs there is no purpose in wearing fins.

Another point around amputations is that most of the general population make an assumption that a leg amputation is the result of a traumatic incident.  That is incorrect; by far the majority of leg amputations in the UK are the result of diabetes. Those whose legs are amputated as a result as diabetes are more likely to have poor healing of the stumps.  This also presents an issue of comorbidity that may well result in an AMED or Dive Referee declining to sign them off as ‘fit to dive’.  If signed off you would need to be very aware of the health of a stump; I certainly would not take someone with an open wound diving and the fact that they will be on medication for the diabetes.  You also have to be aware that they may well be on other medication to manage pain etc.

You need to be very clear with those who have paraplegia and other conditions that they must let you know if they start to feel cold.

Managing air – diving just using your arms for propulsion can, for many, be very tiring and a considerable amount of effort is required.  This, plus other factors, may result in enhanced air consumption by the diver.  This may increase if a current is encountered, even one which most divers who have use of their legs and dive with fins would not cause the least concern.

Within Deptherapy we very much work on the ‘rule of thirds’ – a third of your air to get you down and to see what you want to see, a third to get you back to the surface and a third in reserve.  This in most circumstances will ensure no ‘low on air’ or ‘out of air’ situations.

Say if we have 210 bar in a cylinder that means 70 bar out, so turn on 140 bar, 70 bar to return and to the surface so we should have 70 bar reserve at the surface.

We also work our students through SAC rates and looking at the air consumption of others in their team.

Checking the team’s air frequently during a dive is stressed to all our Pro team.

Keiron became very engaged with this concept as the result of the online RAID study for his Master Rescue Diver.

On expeditions we normally dive in small teams, a DM/TDM with three programme members.  They work as a team and understand each other’s air consumption. Of course, they also dive as buddy pairs.

Today offered perfect conditions for diving, and Keiron, Moudi, and this time TDM Oatsie were kitted up and in the water within minutes.

Pause for thought… those with paraplegia will have different toileting arrangements to those who do not have the condition. This also applies to some who have suffered traumatic limb loss.  They may use catheters for urination, some may have Stoma bags etc.  This all has to be planned into your dive schedule to ensure the safety and comfort of your student.  For young people talking about these very personal arrangements may be very difficult.  Those with Stoma bags may be embarrassed by people seeing them.  This is another part of seeing beyond the injury or condition – it is the person inside that you are dealing with.

Corey on the Roots House Reef

So, Corey, Michael and myself were joined by Swars.  Swars, although he joined the DM programme at the same time as the other guys, because of work commitments was unable to join us in September 2019 at Roots where we ran a DM introductory programme alongside the crossover of our Pro Team to RAID.  Swars has become a really good mate; he is a great diver, with an engaging personality.

Michael and Oatsie were a known quantity to me as they had been on the September 2019 programme and both have travelled to my home dive centre Divecrew in Crowthorne, Berkshire, to work on courses, pre-COVID.  During COVID Michael and I, plus a few of the guys from Divecrew, have dived at Wraysbury together.

Just as Roots is our base in Egypt, Divecrew is our base in the UK, and through this relationship, Martin (who owns Divecrew with his wife Sue) is one of our trustees. Together they have established a centre where pretty much 100% of the Pros are Deptherapy Education trained.

I asked Swars straight away to brief a dive for Corey. I gave him the briefing slate, a few tips and then ten minutes later he came back with a perfect briefing… and I mean perfect.  So, a great briefing under his belt; now to watch him work with Corey in open water. He looked the Pro, he knew what he should be doing, he understood his role. We assigned Michael as Corey’s buddy and said he would lead the dive. I was there to assess the TDMs and supervise very closely Corey’s skill demonstrations.

Again, it comes as no surprise that many beneficiaries in Deptherapy can move straight into dive management, as several were NCOs, as was Swars, and they are used to briefing individuals and teams.

We had decided that we would mix up the dives required to complete Corey’s OW 20 RAID dives with some general diving as trim and swimming arm action are all important. We also needed to concentrate on spatial awareness.

We agreed a signal for horizontal trim and Swars reinforced the swim stroke that Corey needed to do to get propulsion.  Every time Corey moved out of horizontal trim Swars was there reminding him about trim and reminding him of his swim stroke.

The Roots’ House Reef is amazing – at a metre you encounter a shoal of black Damselfish, at 3 metres a shoal of Unicornfish, there are Butterflyfish and all manner of other fishes in great profusion.  The coral is in great condition. It really is a place of beauty and tranquillity.

Oatsie and Swars relaxing by the Roots pool after a long day

Although we had problems getting Corey underwater again, once we got him in skill demonstration mode his anxieties disappeared.  We then took him diving. Steve Rattle, the owner of Roots joined us and was taking photos that provide a great record of the week’s diving.  Steve commented on the quality of Swars and Michael’s supervision and control underwater of Corey and gave them feedback on how impressed he was.

Meanwhile on the RAID Master Rescue Course, Oatsie who was in the same Regiment, same Platoon and Section as Keiron in Afghanistan was more than willing to be a very uncooperative victim for his brother-in-arms.  I think Keiron gave Oatsie some feedback about this!

For me this was a hard week, combining running the RAID OW 20 for Corey but also the assessment of our three TDMs.  A week underwater but no opportunity to dive for myself.  People often think Deptherapy Expeditions are holidays for the Dive Team; they are not, it is hard work and I mean hard work.

Tomorrow is Day 4 in the water Day 5 of our trip. We are on the House Reef again, and things are starting to come together. Join us back here on Monday 26th October…

Continue Reading

Dive Training Blogs

Scuba Diving Instructor Ranks Scuba Specialty Classes… the good, the bad and the rubbish!! (Watch Video)

Published

on

Scuba Diving Specialty Certifications! Which ones are worth your money? And which ones are just rubbish?!

This professional Scuba Instructor has strong opinions about Scuba Specialty Courses, and he’s sharing them with you!

Wreck Diver, Deep Diver, Nitrox, Buoyancy, Boat, Ice, Dry Suit, UW Photography… the list goes on and on. With so many choices for Specialty certs to get you to Master Scuba Diver level, how do you know which dive courses are of value, and which are a waste of time?

We ask 3 simple questions of each Scuba Course and rank each course’s value for you. So before you sign up for your next PADI e-learning course, WATCH THIS VIDEO!


Subscribe here: http://bit.ly/DiversReady

Continue Reading

E-Newsletter Sign up!

Competitions

Expires on:

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

More Less

Instagram Feed

Facebook Feed

Facebook Pagelike Widget

Popular