At the end of 2016, diver training agencies including BSAC launched Sea Survival training courses developed in conjunction with the RNLI. Despite the common view of the RNLI as being the provision of lifeboats and crew, there is much more that they are involved in from a safety at sea perspective, with particular foci on fishing industry accidents, Swim Safe training courses and safety advice for all water users. It’s astounding how many fishermen don’t wear lifejackets, especially local pot-boat skippers who often work alone.
To try to educate fishermen the RNLI brought a dozen of them from around the UK down to their training base in Poole. All the skippers had previously attended the mandatory Personal Survival Techniques course (and it’s predecessors) which are run in swimming pools around the country. The RNLI trainers asked about lifejackets and got the usual story, the fishermen had them but rarely wore them. The general feedback was that as strong swimmers they were confident that should they fall in the sea, they would be able to swim back to their boat, climb up the tyres on the side and self-rescue. Interestingly, qualified divers and anyone who swam in the sea was excluded from the test group. Repeated attendance at sea survival training had led each fisherman to conclude that their lifejackets weren’t necessary. The RNLI sought to challenge that belief.
The night before the training course, the trainers opened the doors around the training pool to let out the heat. Overnight the water temperature dropped to 15 degrees. If you are a diver around the British Isle I am sure there are days where you dream of 15 degree water! At the first attempt the fishermen were asked to wear their normal deck attire and jump in to deep water to simulate falling off their boat. With no life jackets on, the impact of cold water shock was immediate. None of the 12 fishermen lasted longer than 5 minutes before a rescuer intervened. Post dip interviews revealed their shock and surprise at how debilitating the cold water was, definitely nothing like their sea survival training course.
Cold water shock is an immediate short-lived response to immersion in water less than 15 degrees. Blood vessels at the skin contract rapidly, increasing blood pressure and the heart rate. An initial gasp for air can be followed by a breathing rate that is 6-10x higher than normal. It is likely that cold water shock accounts for most deaths when people have unexpectedly entered the water. If you are not wearing flotation during this phase, keeping your head above water becomes the biggest problem. Over the next 10 minutes, cold incapacitation reduces blood supply to the muscles, making it difficult to swim or self-rescue. A crew member throwing a life ring to you during this time will be frustrated that you can’t actually hold onto it or kick towards the safety of the vessel.
The following day the exercise was repeated but this time with lifejackets being worn. The same cold water shock reaction was initiated, but the fishermen didn’t have to work so hard to keep their airway out of the water, the cold incapacitation stage took longer therefore improving their chances of getting back to the ladder on their boat. You can see the videos from this exercise on the RNLI website.
This started me thinking about why divers were excluded from the test group. I’ve realised I still brace myself for the cold water after decades of diving. OK, I’m wearing a drysuit and the cold water shock reaction is pretty much limited to my head and hands. But how many of us drop beneath the surface in anticipation of that brain freeze moment? As the blood vessels rapidly contract they stimulate the trigeminal nerve sending pain signals to your brain. It hurts for a few moments until you become acclimatised. The fishermen in the RNLI training exercise couldn’t get past that brain freeze feeling.
I think we sometimes underestimate the impact that cold water immersion has on new divers. I can recognise it enough now, but when I think back to learning in a wetsuit I can remember the feeling of panic, rising heart rate and accelerated breathing rate as I used to get into the water. Although we will all recognise increased air consumption by trainee divers, perhaps part of this is their reaction to cold water immersion? I’m sure that with experience comes the anticipation, the forced control of breathing rate for the first few seconds, but until our new divers have developed their response, maybe we should keep a close eye on them for those first couple of minutes? If your trainees are hoofing through their air and their buoyancy is being disrupted by their rapid breathing rate, maybe it’s something to consider?
Once upon a time my Editor and I went diving together. It was a few weeks after he had penned an opinion that back entry dry suits were an integral part of the buddy relationship. It was, he opined, important to trust your dive buddy to close the ridiculously expensive brass zip without trapping your undersuit or that annoying flappy bit of neoprene stuck in the back of several suits. Relying on your buddy to ensure the zip was closed all the way, contributed to the mutual support aim of buddy diving. As we stood kitting up for our dive, I happily fastened my front-entry plastic zip with the minimum of fuss and decided to tackle Simon about his ill thought-out piece.
I have a front entry suit because I like being responsible for myself…or more precisely I don’t always trust my buddies, especially if my buddy is a trainee or new to dry suit diving. I lack the ability to rotate my neck like a barn owl to check that everything is OK behind me. It only takes one trainee, who earnestly assures you that the zip is closed when in fact it’s half an inch open, to make you reconsider. When that cold rush of sea water starts running down your shoulder, you know that this is one mistake you won’t be making again!
But how do you get the dive manager or boat crew to double check your zip without offending your buddy? Surreptitiously sidle over to the crew as you leave harbour, keep your voice low so it can barely be heard above the engines (and definitely not by your buddy) and assume some wistful position that doesn’t look like you’re hugging a large imaginary tree? And of course all the while you must try not to offend your buddy and generate “trust issues” because at the very first time you are supposed to rely on their assistance you bailed and found another source of help.
So for me a front entry suit solves all of these problems. If my zip isn’t closed properly, then that’s my fault and my soggy right leg. For anyone thinking of getting a suit with a plastic dry zip, they are fabulous but never ignore the need for silicon greasing the stop end, even between dives if you’ve peeled out of your suit. But it’s my responsibility and I’m good with that.
Front entry suits frequently have two zips, the dry one and a cover zip, and this can cause endless problems too. I took my eye off the ball one day whilst doing a dry suit introduction in the pool. I will accept some of the blame, but we had just done a session at the dive centre trying on suits, and the concept of a dry zip and a cover zip had been discussed as we established that this particular suit was a good fit. I am to blame for thinking that our discussion would be remembered barely an hour later when we kitted up on poolside. When I turned to look at my two eager divers, they had closed their zips and were ready for the stride entry. Yes, the cover zip was closed. No, the dry zip wasn’t. Yes, the suit filled with water (luckily the warm pool version). No, the diver couldn’t climb up the pool ladder unaided. The phrase “I seem to be getting a little wet” was a total understatement on her part. Once dekitted, we laid the unfortunate lady down and rolled her around on the pool surround to empty the water. To give her credit she laughed nearly as much as we did and gamely carried on the orientation session. Five years on she is still diving, in a front entry suit, which she knows has two zips and one of them is very important.
Sadly she’s not the only one who’s been caught out in this way. Even some quite experienced visiting divers have missed the ‘hard to do up’ brass zip and relied on the ‘easy to do up’ cover zip in one of our rental suits. A cold shot of Irish Sea water down the leg is a salutary lesson in the need to familiarise yourself with hired equipment. So for anyone who read, noticed and remembered Simon’s treatise on the importance of back zipped suits for buddy trust and diving, maybe I was wrong to criticise him and perhaps divers with front entry zips could do with their buddy’s assistance, just sometimes.
We rely on our diving buddies not only to share the safe diving we are all seeking, but to provide the support to take on more challenging dives and the back-up when things go wrong. Members of other sports don’t have to rely on each other in anything like the same way. Poor teamwork on a football pitch means you lose the match, but no-one’s life would be endangered by it. Poor teamwork on a dive trip means oxygen cylinders don’t get checked, dive briefs get skipped and the outcomes can be deadly serious. With strong dependency on the people in our dive centre can come strong emotions. Longstanding members of a club will know each other’s families, children will spend their summer holidays on dive trips and learn to snorkel or dive within the branch. Non-diving partners can frequently be found supervising a game of beach cricket for a coach load of divers’ children. So woe-betide any Johnny-come-lately who suggests that, instead of the annual pilgrimage to Weymouth, they would like to head to the Farne Islands this year. You are not suggesting that diving with seals might be a fun trip. Oh no! You are (inadvertently) criticising years of family summer holiday tradition! How very dare you?
Diving attracts people from a wide range of day jobs and with that diverse background comes a wide range of skills. The key thing for all of us is the ability to work within the team, to respect each other’s perspective, to negotiate change and to keep an open mind. The job of a dive instructor may seem simple but really good instructors will have a skill set that would make a recruitment agency go weak at the knees. Some time ago a study tried to calculate the value of a mother, checking all her many roles and pricing the commercial equivalent. The final figure was somewhere over £100,000 a year. Putting a value on your dive centre manager will reveal a similar scary figure. Can you imagine employing someone to check the training, observe instructors, meet and greet, strategically plan, keep tabs on the kit and manage the members within the club? For those frustrated members within clubs please note I specifically said putting a value on your DO, not a price! Dive clubs can be the most frustrating places in the world at times – but they can also be the most rewarding and supportive environments for your dive adventures.
Choose yours wisely.
The beauty of running a dive centre is that we become the first port of call for the ‘odd projects’ that come along. Over the years this has varied between organising dive conferences, running evening snorkel safaris, recovering plankton data recorders, surveying scallops, razor shells and caves, and every so often some film work. A while ago I worked with a German film presenter whose task was to catch and cook some scallops. Part of the director’s vision was that the poor presenter didn’t know the plan until she arrived on the shoot. This is a European programme so she’s seen Belgian chocolate factories, Swiss cheese makers and now she was headed for the bottom of the Manx sea bed.
In situations like this your Instructor Sense starts tingling as bad as Peter Parker’s Spidersense ever did. How much diving has she done? Has she dived in cold water before? Has she used a dry suit before? Has she ever used a full face mask and comms? The director shrugged the questions off with an air of nonchalance that only a non-diver could maintain. Would it be alright if they flew in on the Saturday morning, did the filming and flew out in the evening? Involuntarily my hand flew up to smack my own forehead as I briefly lost my air of professionalism. Cue a lengthy discussion about sea conditions, weather, familiarisation with new kit and skills, risks of DCI and flights. Oh and the scallops in question being out of season at the time they wanted to film, making us liable to a fine of £50,000!
The Director of Fisheries was duly contacted and issued a special permit for us to collect and retain enough scallops for the filming. The TV director was persuaded that a three or four day filming period was needed to be able to teach his presenter the necessary skills, safety divers were lined up and we started anxiously watching the weather. I read somewhere the other day that many teenagers wake up and check their Facebook profile before getting out of bed, brushing their teeth, using the toilet or anything else. I’d like to think I’d never be that bad, but I’ve realised lately that I can find the weather apps on my iPhone before I’ve really opened my eyes in the morning. I’ve become a compulsive forecast watcher. And as filming days approached the weather was looking less and less favourable.
We took the executive decision to go and catch our scallops early and store them so that we would at least be able to ‘seed’ a sheltered bay if the weather really turned bad. As the scallop season had closed in June we hadn’t bothered going near our favourite scallop spot over the summer. We dropped down in anticipation and were stunned by the state of the seabed. Port St Mary Ledges are a series of limestone gullies running out from the shore. Although the dredgers run up and down the sand at around 30m, they never usually come into the rock ledges – but that must have changed last year. If we’d sunk a tractor and ploughed the seabed it couldn’t have been any worse. The deep gouges through the rock and sandy gullies had cleared every bit of life; the hydroids, dead man’s fingers and sponges had all been ripped away. And there were no scallops at all. Luckily our back up plan for a slightly deeper, more tidal site came through and we collected our scallops for the shoot.
The shooting days were long and repetitive. The weather was as bad as predicted and the visibility was poor. Our safety divers ‘seeded’ the seabed from the bottom of the shot line. Never before has a skipper so confidently said “Head North and you’ll find the scallop bed.” But our presenter wasn’t happy. The overwhelming amount of new skills and new kit, the demands from the director and film crew and challenging surface and underwater conditions tipped her over the edge. For a couple of hours she sulked in the cabin next to the heater, declaring that she had never been so cold and miserable in her life. Never underestimate the power of divers to ‘make things happen’. We dressed our male dive intern in the female presenter’s drysuit, gloves, mask and hood, dropped off the back of the boat and went and did some more filming anyway. The dive brief was short and sweet and mainly consisted of reminding him “Don’t look into the camera” repeatedly!
Michelle has been scuba diving for over 20 years. Drawing on her science background she tackles some bits of marine science. and sometimes has a sideways glance at the people and events that she encounters in the diving world.