JANUARY 2019 mouthpiece 51st Club Year Edition

Bracknell 434 celebrates turning 50

IN THIS ISSUE Grenada 2018 by Nic Halle Gradient Factors by Ma Fry Scapa 99 - Reconnaissance of the German WW1 fleet by Jonna Fry Are We meeng Your Diving Expectaons and Needs? by the commiee 1 A blast from the past from an old Mouthpiece

From Mouthpiece April-May 1997 so we could see a good part of the wreck as we descended. There was a large shoal of fish in Trip to Ireland 1996 between us and the wreck. The fish life could We had driven up to Scotland and were have been somewhere exotic. Alan who was in loading our equipment on to the dive charge of the diving on board of the Salute, boat Salutay at Port Patrick on Friday and was the owner’s son, has a water scooter night. My dive buddies for the trip were (torpedo) and I can still see him circling the to be Nick Jewson and Frances Searle. shot going down towards the wreck. A part of As soon as we were aboard and loaded, the ships cargo were Sherman tanks. It was the Skipper set steam for Ireland. great swimming amongst the tanks. It was a memorable dive. In the morning, we were off the coast of Northern Ireland, not far from Rathlin On the last day, our shallowest dive, we dived a Island. The first dive was the wreck of Uboat from the Second World War at about the Santa Maria. It was a US tanker 58 metres. On this dive, because the Skipper which was torpedoed during the First World War. As we did not quite get the slack right, we did not stay long as the were kitting up, the Skipper warned us there was a killer sea was running. Even so, it was great to see this Uboat whale chasing salmon so I was going to try and not look like intact. a salmon. The top of the wreck can be an air dive, about 50 Whatever your preferences, shallow or deep, wrecks or metres, but the bottom is about 70 metres, which was great scenic, diving the Salute and the area of the coast of Ireland as we were all diving on this week, however the is great diving. I have already paid my deposit for this year’s seabed slopes even deeper with a debris field. The visibility trip as not only was the diving great but the accommodation was very good, about 20 metres and we could see a great deal and food were good. of the wreck. Dennis Hughes The second day, the Atlantic was a little bit rough so everyone agreed to have a day off. We went ashore and sampled some of the ‘black liquid’ that they sell in Ireland. The village near where we were anchored had a pub in a shop or shop in a pub, whichever you prefer. On the third day we steamed out into the Atlantic and dived a large dreadnought, FM4S Audacious off of Malin Head in the Republic of Ireland. It was a vast wreck again about 70 metres and the visibility was even better than the first day. The first thing that greeted me on the bottom was a large lobster. There was still lots of the ship’s brass steam valves, ammunition, torpedoes strewed around. When we surfaced everyone agreed that it was a great dive so we dived it again the fourth day. On this dive we came across one of the turrets, which was massive. Again everyone thought it was a great dive. On the fifth day, we had the best dive of the week. Off into the Atlantic again, this time a second World War wreck, Empire Heritage, also at 70 metres. As we went down the shot, the visibility was about 40 metres

2 a pre-season message from our Welcome to the 2019 edion of Mouthpiece

Diving Officer

With the next dive season about to rise above the Many thanks to everybody for their horizon, I’m sure that many of you are preparing kit contribuons. and planning your forays into the blue, green or • • • • • • • • • • • • • • • • • • • • • • muddy brown waters. Hopefully you have sent your life support equipment off for service, if due?! In this issue There are a number of items that oen go unaended but play a crical part in our safe dive conduct. Low inflator hoses and BCD inflator valves seem to miss out on TLC. Failure to funcon could put a nasty spin on your diving pleasure. A blast from the past 2 If you posses no praccal skills, you should engage a competent person for any • • • • • • • • • • • • • • • • • • • • • • maintenance tasks. But if you are confident in your general praccal abilies, there are a few measure you can safely perform as interim equipment care. Message from our DO 3 Probably the most common issue with hoses and inflators is the build-up of salt crystals and general deposits. Without dismantling, you can simply immerse the • • • • • • • • • • • • • • • • • • • • • • open end of the inflator hose or the whole inflator valve for the BCD in a mild soluon of citric acid or white vinegar for 5 minutes, agitate or manipulate moving Grenada 2018 4 parts and repeat. H&S police here - take suitable precauons. Finally, rinse in fresh water and check for correct operaon. • • • • • • • • • • • • • • • • • • • • • •

If all is OK, the job is done. If all is not OK, any issues should be passed on to your Photo comp winners 7 friendly competent person. We plan on running an equipment care session soon - keep an eye out for the • • • • • • • • • • • • • • • • • • • • • • announcement! Gradient factors 8 Please take advantage of the pool availability on club nights. Any qualified diver can use the pool without direct supervision. Just inform the pool marshals what • • • • • • • • • • • • • • • • • • • • • • you intend to do. It’s a perfect opportunity to check over your kit, try new configuraons, and even pracce those less oen used skills. Incident reports are Celebrang 50 10 full of avoidable outcomes due to lack of skills pracce. When did you last perform a CBL or AS drill outside of a course? It saves lives! • • • • • • • • • • • • • • • • • • • • • •

There is a very acve and varied schedule already planned for the new season. DDRC case study 12 Early lake dives to get you dive fit and ready, so blow off the cobwebs and get back into the swing of things. Many training events have started and there are more to • • • • • • • • • • • • • • • • • • • • • • come. Lots of dives have been published and there are plans for more. The club is trying to ensure we communicate with the membership more efficiently. Scapa 99 13 Social media and email broadcasts seem the most appropriate for those who can’t • • • • • • • • • • • • • • • • • • • • • • make regular club evenings. So please make sure we have a contact email address and you sign up for the facebook group 1 (don’t ask me, I’m a luddite). Commiee contacts can be found at the end of this edion of Mouthpiece. Diving expectaons? 16

Safe diving. Hope to see you on one of the 2019 events. • • • • • • • • • • • • • • • • • • • • • • Andy Hodgson Diving Officer Dates for your diary 18

1 The public FB page is Bracknell 434 Sub Aqua Club, hps://www.facebook.com/BracknellBSAC434/ • • • • • • • • • • • • • • • • • • • • • • The secret group is Bracknell Sub Aqua Club, hps://www.facebook.com/groups/bsac434/ [editor] 3 Planning a dive? 18 Grenada 2018 by Nic Halle

There is a much loved movie called "Cocoon" where a group of elderly, decrepit pensioners find a swimming pool containing (spoiler alert) an alien presence that causes them to rejuvenate. Welcome to the 2018 club trip to Grenada in the southern Caribbean!

4 Halloween week and seven couples head off from freezing The mid morning dive is far more typical, on the lee of London airports, a short stop on the tarmac in St Lucia, and the island on the Caribbean side. If you haven't dived the then a 5 minute taxi ride from Grenada Internaonal Airport Caribbean then what you can expect in numbers is: 20 metres up to the Sandals resort (other resorts are available). We depth, 45 minutes, 15m visibility, 28˚C and just half of a 12- check in for up to two weeks of all inclusive luxury including litre cylinder. The corals are in very good condion here with all the diving you can handle! lots of sea life - not the full on, diving-in-an-aquarium Red Sea Arriving on Halloween night is prey surreal. Aer 15 hours experience, but good nevertheless. of travelling, 4 hours of jet lag and copious amounts of BA The next few days pass in a regular paern of diving, eang booze we're no longer clear on what's real and what's the and drinking. The alcohol is always in moderaon, not just result of our fried consciousness. Staff and guests alike are because we are diving but because when you are surrounded dressed as witches and warlocks, pumpkins cover every by all inclusive bars, on-tap cocktails, spirits, wine and surface, and the entrance to the main Lounge Bar is through a champagne in your rooms...the novelty kind of wears off. 4m high, cut-out pumpkin. Aer unpacking and a sushi Is it Tuesday already? Days and dives blur into one unl we supper we meet up with the other Bracknell BSACers for a head out to Black Forest Reef - so called because of its few more drinks and a stunning Halloween set from an preponderance of black gorgonian fans and lile to do with electric violinist. Imagine Thriller meets Nigel Kennedy meets cake. As we near the site the shimmering surface is slashed ELO. No diving tomorrow! by six dark dorsal fins, breaching for air, then diving Aer a 36hr detox the intrepid seven (Chris E, Alan A, two effortlessly away. In a flurry of excited patois the dive guides Beaes, two Bhatnagers and me) are at the dive centre at urge us to kit up and we're quickly in the water, curious 06:30 for an Atlanc shark dive on the Hema 1 wreck. Despite dolphins circling us within arm's reach. Two minutes later the 4 hour me shi it sll feels very early for normal people they've moved on to ever more interesng sites, leaving us to on holiday although some seem to be up at this me every explore another glorious reef with nonchalant turtles feeding day anyway. I think we have different definions of being on on the coral. holiday! 17:30 and we reconvene at the dive centre, loading sll-damp kit on board, looking for a cylinder with a good fill. The We should know to expect the worst when told to fully kit up standard grey, aluminium, no frills cylinders are pumped on before we leave the peace of the hotel harbour. The trip out site and vary from 190 to 260 bar and everyone wants the has a 2m and the large hard boat is tossing like a jet ski laer. on a white knuckle ride. At one point a wave crashes over the flying bridge and straight through the front windscreen We head West into a stunning sunset, to Shark Reef. It's only washing everything, including a somewhat out-of-place five minutes away in the Twin Vee hulled catamaran powered bicycle, all over the deck. We hang on grimly. by two Yamaha 250 outboards but it is dusk already when we At the dive site we shuffle to the stern, riding the ignominious arrive. The boat's lights switch on as we kit up, glow scks on swell, and drop in for a negave entry, finning head down to every pillar valve and a plethora of ultra high powered LEDs 31m as fast as our ears will let us. Near the sea bed we realise that would light a football stadium. We'll be a lile patch of that all the finning in the world is creang no progress against daylight travelling the reef on this night dive. the strong Atlanc . I'm not sure the concept of slack If you haven't been on a night dive then it is an upside down water is covered by the Caribbean version of . world. You step off the gunnels into inky black water. Day With no wreck, no sharks and no progress in sight we me diving usually means "dark below, light above" whilst a abandon the dive with just the prospect of geng back on night dive is reversed. The uerly black night sky means that the large pitching hard boat ahead. above you there is just an empty dark void like finning by a

Caribbean pipefish A good fill Sand Diver Lizzard Fish 5 Flamingo Tongue Snail Chris and Alan black hole in space. Below the torches cast a brilliance upon an early trip to Flamingo Bay. So called not because of the the white sandy sea bed. famous large pink birds but for the lesser known, ny Flamingo Tongue, a sea snail found hiding out in the sub We spot a couple of small but grumpy nursing sharks, marine fronds of the reef. This is a wall dive out, to 30m or irritated that their nocturnal hunt has been interrupted. The more, and a reef dive back. Being a marine park the volume dive guide illuminates a free swimming Big Fin Reef Squid of sea life is noceably denser. This includes pods of dinner which we follow for a while unl distracted by a small Eagle plate sized lobsters brazenly wandering around in the open, Ray and then a very large turtle. With a five foot long ignorant of the fate that hundreds of their cousins are facing carapace this 250 kg monster was wedged amongst the in the many resort restaurants every evening. corals, sleeping, as they do, with their eyes open. Although With a couple of days to go I decide to rinse off my fins and these are air- reples, with "shells" evolved from modified rib bones, they can hold their breath for up to seven chill for the rest of the stay. Meanwhile the hard core divers hours while sleeping safely underwater. I've known divers squeeze in every dive the no-fly seng on their computers with similar air consumpon! allow. By the end of our 47 mins we have lost count of the number I may feel rejuvenated Cocoon-style but I'm not convinced of turtles we have seen, mostly sleeping, some swimming, the all inclusive lifestyle has shed the years I'd have liked. and have finally seen my first couple of octopi. A fantasc However we'll be home in me for Christmas and then start the detailed planning for next year's Red Sea trip - here we dive as we slowly surface full of stories and great memories. come! The next morning we watch the transient sun rise at 06:00 for

Sandals Aqua Center Bow of the Tyrrel Bay Banded Cleaner Shrimps

6

2018 Photo compeon winners

UK Diving “Swimming through the accommodaon block of the Aeolian Sky”, photo taken by Jonna Fry

Abroad Diving & Overall Winner “Ray”, photo taken by Tom Cowan

7 here comes the science bit Gradient factors by Ma Fry

There are many different ways that in diving pressure differenal (so we start off-gassing), but we cannot can be calculated. They all try to approximate what is going exceed the M-value of any ssue compartment as menoned on in the body so that the risk of (DCI) above. If we do, we risk DCI. In truth it is not a hard line, is reduced. Such approximaons are also referred to as rather an increasing risk as we approach and pass the M- decompression models. One of the most common models in value. use was developed by Professor Albert A. Bühlmann , based The graph below shows pressure (equivalent to depth) on the on some 30 years of research. horizontal axis and ssue compartment pressure on the Very briefly, the Bühlmann algorithm (and its predecessors, vercal axis. On the graph, as you ascend from a dive you like, Workman and Haldane) has several ‘ssue move from right (large orange arrow saying ‘ascent starts’) to compartments’ that model the body’s ssues from fast to the le (follow the orange line to the le). slow (e.g. muscle is fast ssue and bone is slow). Each of the Ascend during a dive, the decreases and ssue compartments has a me describing how fast it on- when you pass the ‘ambient pressure line’ you start off- and off-gasses. Each ssue compartment also has a gassing. You must then stop at the M-value line, with the maximum super-saturaon limit, which refers to how much stop represented by the vercal orange line, while you wait the ambient pressure can be reduced relave to the ssue for enough gas to be safely released before you can make a pressure before DCI symptoms appear. This is known as the further ascent. When you again hit the M-value line, you M-value. need to make a further stop. When you, as a diver, start to ascend from a dive, all of your M-values and mild DCI ssues have a lot of dissolved gas in them. As soon as the pressure of dissolved gas is more than the ambient pressure, Many divers found that, although they were following gas starts to come out of the ssue (called off-gassing). The Bühlmann generated plans, they sll got DCI or did not feel greater the difference, the faster the rate of off-gassing, but well aer a dive - interpreted as having mild, non- also the greater the risk of DCI. That means, we need a observable, DCI symptoms. This lead to manufacturers to add safety factors into the computer

8 models. The two key advantages with the Gradient Factors method is: 1) can select the Gradient Factors they feel are A number of approaches to help resolve the issue have been appropriate; and 2) the addional ssue loading gained by developed. One came from Richard L Pyle , a marine biologist stopping at greater depth is accounted for. who noced that when catching fish samples on deep dives, he felt beer on dives when he caught fish. He suspected that There are many tools now available on PCs and phone apps to this was because he stopped part way up to put a needle in create plans that use this approach, and some dive computers the fish’s swim bladder to release air. He tried adding the also allow the divers to configure them in this way. You may stop, as if venng the fish swim bladder, for dives even when hear divers talk about using something like GFs 30/80. By this he did not catch fish and found this resulted in him not they mean that the low GF (deep) is 30% of the M-value and suffering the mild DCI symptoms. They are known as Pyle the high GF (surface) is 80%. This is shown in the diagram stops. The approach is a lile rough and ready and does not below by the red dashed line. You can see that the top right account for the addional ssue loading gained when stopping end of the line hits the 30% on the GF low seng, and the at greater depth, but it showed that Bühlmann, in some cases, boom le end of the line hits the 80% on the GF high seng. was bringing the diver up too far too fast. From the orange line, you can see that the first stop is deeper than if you had followed the M-value line. The safety margin A soluon applied is the difference between the GF line (the red dashed A rather more structured approach was proposed by Erik C. line) and the M-value line. Baker . It takes the Bühlmann model and modifies the M-value. When this approach was first picked up by the But rather than adding a straight conservasm factor the community, the atude of “if some is good, more must be method makes a new line with a fairly large reducon in the beer” was adopted with divers using factors like 10% for the over-saturaon limit at the deep end, and a smaller change at low GF, meaning the deepest stops were very deep. More the surface, the two values used are known as Gradient recently, research has shown this to be counter-producve Factors (or GFs). and a low GF of 40% to 60% is more typical. For the high GF, Using this approach, the first stop will be deeper than the research has shown that there are few incidences of issues Bühlmann model would call for, and the last stop can have a when 80% or lower is used. moderate addional level of conservasm added compared to So know your GFs and make an informed choice. the Bühlmann model.

9 Bracknell SAC 434 -

Anniversary River Cruise

10 celebrang 50 in style!!

50 Years - 50 SMBs

11 ...and sll celebrang!!

Special Mouthpiece edion 50th anniversary T-shirt

Onto something else Case study from the DDRC

Here’s a case study for you to ponder... and they start to ascent together. On ascent she starts to experience extreme vergo and pain in her le ear. This in A 62-year old female diver has completed 370 lifeme dives. turn leads to rapid ascent from 20 m to 5 m where her pain Her dive group are diving out of Newquay in November with subsides but the vergo connues, despite using the DSMB their club RIB using rolling waves on neap des. She is diving line for reference. She begins to vomit through her regulator using manifolded twins filed with EANx 25%. She feels well in and is unable to maintain her and surfaces, herself but has recently got over a cold. oming her stops. Her first dive is to 35 m with a 30 min boom me, Her buddy has ascended more quickly than normal but compleng her mandatory decompression stops without managed to control their buoyancy before reaching their event. She has a prolonged surface interval during which she decompression ceiling and can hear the club RIB overhead. stays well hydrated. What do you think has happened? What would you do as her For their second dive, she and her buddy are the first pair in buddy? What would you do as the cox’n? the water, diving to 27 m for 32 mins requiring 11 mins of decompression stops. As planned, her buddy puts up a DSMB Have a think and then see the back page for answers

12 Scapa 99 Reconnaissance of the German WW1 fleet by Jonna Fry

13 A major trip of the club’s in 2019 is a return to the turret and the deck and then looking down the hatch. coinciding with the centenary of the sculing of the German The upside down feature also means that in order to get a WW1 High Seas Fleet. Two members of the club used this as good look at the guns, you need to swim down and an excuse to visit already in the autumn of 2018, the excuse underneath the wreck. And following the barrel to the end being to check it out and report back. can mean quite some ‘wreck penetraon’ for some. To those of you who’ve been before; the good news is the An important thing, when manoeuvring underneath the wrecks remain. And they are now clean of any ghost nets, baleship, is to not think about what is holding the many thanks to the valiant efforts of the club’s diving charity of the tonnes of turret above your head in place. year, Ghosishing UK. To those of you who’ve never been before; the bad news is that only 7 of the 74 wrecks sculed Another important thing is to keep your ears open during the remain. briefing for which side of the wreck to drop down on. Because, although they are upside down, they lie at an angle. So, how did it come to this you may wonder? We were so Landing on the wrong side, with no way of geng lucky that the organiser of our trip, Rich, gave us a history underneath to see the guns may not make you popular with lesson every day taking us through dreadnought baleship your buddy. development, Brish humiliaon at the Bale of Jutland, the strategic importance of Scapa Flow, the internment of the Bob’s briefings meant that finding the features were easy. German High Seas Fleet, the chaos of Armisce negoaons, Soon we could spot the breech of 5.9’’ guns, 12’’ guns, von Reuter and his decision, the sculing of the fleet, and casement guns, armoured control towers, winches, turbine Ernest Cox and his desire for some good quality scrap metal. blades, crow’s nests, etc. from quite some distance and out A perfect way to set the scene for the next day’s diving and a the corner of our eyes. great way of making history come to life. Another thing to keep in mind is that these ships are HUGE Paramount to geng the most out of the dive is a good (well, at least the baleships). So the prospect of doing two briefing. Out comes the whiteboard, pens, boat outlines, and dives on the same wreck in a week does not have to involve off skipper Bob went with drawings, descripons and repeons - there is plenty of distance to be covered to anecdotes. Almost as good as the dive itself. make several dives out of it. And if you like the smaller details, then you could spend years - like skipper Bob has. The briefing is especially important because, annoyingly, most of the wrecks are upside down. That can be a bit By the end of the week, we had dived what remains of the disorientang when you are trying to look up through the German WW1 fleet, some of them several mes - the three shell ejecon hatch into the 12 inch gun turret of Kronprinz baleships of Kronprinz Wilhelm, SMS Markgraf and SMS Wilhelm by swimming up from the seabed to get between König, the three light cruisers of SMS Dresden, SMS Cöln, SMS

The interred German High Seas Fleet A winch (..!) Mr Fry enjoying the Scosh weather

14 A thorough briefing The breech of a 5.9 inch gun Inside the Tabarka

Karlsruhe, and the mine-layer, SBS Brummer. And a very popular. Although the Scapa Flow Museum is closed for major broken up, but fascinang, UB-116 - a great treat was renovaons unl 2020 (talk about ming) and the temporary discovering that it had a resident octopus! exhibion in Hoy Hotel was closed. So instead, we headed for the cemetery and further up to the derelict Naval We finished off with a strong dri in Burra Sound, ‘hing’ the Communicaon and Operaonal Centre. We also had an Tabarka just like Bob had said. She is a very photogenic overnight stay away from Stromness. That took us to the steamship sunk to protect the entrance of the Flow from Island of Burray, mooring just outside the Sands Hotel where enemy submarines. an outstanding dinner was had. On the night we ate there, The octopus, along with a seal circling on the SMS Karlsruhe, there were six McLarens in the carpark - not exactly what were definitely the sealife highlights of the trip. The love of one expects to come across out in the scks on the Orkneys. sea slugs were also sasfied. And if you look properly there All in all a great week of fascinang history, exhilarang are plenty of beaufully coloured dahlia anemones around. diving, and great company. The sealife lowlight was definitely the creepy brile stars covering the SMS Cöln. So all there is to do is to report back saying: You guys are in for a treat! Despite it being late September, the weather behaved prey well. Rain showers come and go, with blue skies over the • • • • • • • • • • • • • • • • • • • • • • • • • • fantasc Orcadian landscape occurring in abundance A great site for reading up about the wrecks in advance is inbetween. Although so is the wind, which was definitely hp:// www.scapaflowwrecks.com/ autumnal, meaning that the place to gather aer dives was by the Rayburn in the galley. Numerous books exist about Scapa Flow. Excellent reviews exist for: Our base was Stromness, a small quiet town (read: not much to do). It has some nice walks down the narrow streets and, Dive Scapa Flow by Rod MacDonald with some blue skies, there are lots of good photo The Man Who Bought a Navy by Gerald Bowman opportunies along the water front. The dive shop Scapa If you don’t have need of your car while in the Orkneys, you Scuba, in the former lifeboat building, is well worth a visit. It can park it at the ferry terminal in Scrabster and book a diver has some great Scapa merchandise and a workshop with an trolley for your kit on the crossing. amazing ability to find and mend any drysuit leaks on an overnight service. If you want dinner out the Ferry Inn is the If you want to catch the first ferry back but struggle to get up place to go. early, you can book a cabin on the ferry and get up at your leisure (as long as it’s before reaching Scrabster). Staying on a obviously also allowed for ventures to other moorings. A lunchme excursion to Lyness was very

15 Are we meeng your diving expectaons and needs? by the commiee

The club is here for two primary diving and shule boats are examples of such. So, before shoung that you really fancy diving the Antarcc, have a reasons: Training divers, and think about the me and means you have available. providing diving opportunies. How to get involved and influence people? Well, speak up! Without us knowing, you may be waing for We shall focus on the laer in this arcle. a long me for that special dive to be organised in the club.

So what do we mean? Us knowing will be a good start. Not everyone can or wants to be involved in planning and running dives, and you may be If the variety or availability of club diving offered does not lucky that one of the current Dive Organisers will pick it up meet with your expectaons, we need to know. There are and organise the dive. only a handful of people that organise and run our dives (to whom we are very grateful). All dives are influenced by the However, the best chance of achieving your aspiraons is by requests of our members’ interests, but they are also - to a geng directly involved. The club needs more people greater or lesser extent - targeng the organisers’ personal organising dives. That way we get to do more diving - simple interests, which makes perfect sense. as that. So why not have a go at organising something yourself? It doesn’t have to be a solo task. It is in fact Ideas, aspiraons, me and cost advisable that the first ones are done in cooperaon with an Without your input and views, it is difficult to get an experienced Dive Organiser. And many of the current impression of what you want in terms of diving. So, you need organisers would be more than happy to help. to engage and make your desires known. We would hope that newly qualified divers in the club are The club is trying to address suggesons put forward and chomping at the bit to get some diving in. So speak up, get what we think is of interest. But knowing more specifically together and discuss your aspiraons for the next year or always helps. Do you have a burning desire for diving a two, make a plan, and then find someone to organise the specific wreck or site? Did you read about an interesng site diving with or for you. in Scuba magazine that you’d like to visit? Would you like to What’s needed? see a nembrotha cristata nudibranch? Or dive with seals? Do you have a parcular diving interest? Maybe underwater Dive Organisers can be of any level of qualificaon. They just photography? Well, then it seems like a perfect excuse for need to be enthusiasc and prepared to put in a lile me arranging a dive around these interests. and effort. Communicaon is key and making sure everyone on the dive have all the relevant informaon at the right me Many topics determine what we do as a club. Besides from is essenal. diving interests, cost and me are some of them. Some require a lot of planning and quite some saving up. However, All club sanconed dives require a Dive Manager. This person there are also plenty of opons that either have limited costs is delegated by the Diving Officer to oversee and ensure all associated or take up less precious me. South coast shore acvies are conducted in a safe and appropriate manner.

16 Your friendly Becoming a Dive Manager is a topic for another me, but if commiee you are interested then please speak to the Diving Officer for further informaon. Ma Fry Chairman The alternaves [email protected] Of course, nobody is restricted or limited to dive within the club. We thoroughly recommend diving with other groups - besides from hopefully enjoying some fantasc diving, Andy Hodgson you meet other divers who can hopefully inspire you and Diving Officer maybe tell you of new dive sites or encounters to visit [email protected] next.

Ocean Divers are restricted to diving while under the supervision of a Dive Manager. This role can be a Marn Hamilton delegated club member ( or above) or anyone Training Officer holding a similar status of authority who has been directly [email protected] nominated to take responsibility of the diving-related event. In simple terms, any professional facility that provides guided dives will fall into this definion. Dive Geoff Baker centres, charter boats and are great examples. Treasurer Sports Divers and beyond can arrange their own private [email protected] dives. They should, of course, sll consider shore support and safety, as taught in their training. As a minimum, they should inform others of their dive plans and return me. Ruth Beae Membership Officer Stay within your comfort zone and dive within the [email protected] condions you are trained in.

So..? Richard “Bendy” Camplin The club is here for its members. So speak up and make Equipment Officer your views known. Start with speaking to someone from [email protected] the commiee (mug shots and contact details on this page, just in case you don’t know who they are).

Have a go! Get involved! Hey, you may find you Peter Newman enjoy it. Publicity Officer [email protected]

Richard Watson Club Secretary [email protected]

Sue Payne Social Secretary [email protected]

Andy Taylor Project Officer [email protected]

17 Planning a dive? DDRC Case Study, answers DATES FOR YOUR DIARY The event was triggered by a reverse Need some inspiraon? squeeze due to the diver’s recent cold. 02 March 2019 An interacve map showing the locaon of more than When diving aer a cold, the lining of the Lake (tbc). Organiser: Peter Newman 1,100 World War One wrecks has been created Eustachian tube linking the middle ear to the back of the throat can remain swollen 16 March 2019 The map reveals wreck sites off the south coast of making equalisaon difficult on descent. Lake Vobster. Organiser: Andy Taylor England of naval, passenger, troop and hospital ships This can result in the middle ear cavity plus airships and submarines. Some we have dived, 30-31 March 2019 being at a lower pressure than the ambient some we dive regularly, and some we may dive in the Froses weekend in Portland, Dorset. pressure which in turn leads to fluid future. Organiser: Zosia Rusilowicz accumulang in the middle ear. This fluid The four-year project, called Forgoen Wrecks, was can then block the Eustachian tube so that 06 April 2019 devised by the Southampton-based Marime when a diver starts to ascent the air cannot Lake Vobster. Organiser: Ma Fry Archaeology Trust. The aim of the project was to record escape through it causing a raised middle the remains of sites and vessels “before they are forever 13-14 April 2019 ear pressure. This raised pressure can lost to me and de”. cause a perforated eardrum as well as Dive weekend in Portland, Dorset. inner ear . Organiser: Ma Fry As a result of the inial vergo and pain the 27-28 April 2019 diver has a rapid ascent from 20 m to 5 m Dive weekend in Portland, Dorset. and then is unable to complete her Organiser: Chris Edwards decompression obligaon. This puts her at risk of several diving injuries/illnesses. As 11-12 May 2019 well as ear barotrauma, she may well have Dive weekend in Portland, Dorset. suffered pulmonary barotrauma if she held Organiser: Jonna Fry her breath on ascent, causing an arterial 25-27 May 2019 The map shows the resng place of wrecks from gas embolism. The fact that she failed to Club Weekend in Portland, Dorset. Margate to St Agnes. Users can zoom in on the map to complete her stops would also put her at find out more about the sunken vessels from across the risk of . Organisers: Andy Taylor/Jonna Fry world. The stories of the ships have been charted using As the buddy you sll have a significant 8-9 June 2019 survey findings, geophysical images, dive videos, decompression obligaon and surfacing artefacts and historical photographs. Training boat out of Portland, Dorset. immediately, oming your stops, would Organiser: Jon Payne hps://map.forgoenwrecks.org put you at significant risk, especially when 7-14 June 2019 the RIB is nearby to render assistance to the diver. Best of Wrecks in the Red Sea. Organiser: Nic Halle As the cox’n you have a duty of care not only to the casualty but also the other 22-23 June 2019 divers in the water. This pair were the first Dive weekend in Portland, Dorset. group in so it is likely that you have more Organiser: Andy Hodgson divers sll underwater. Your priories should be to get the casualty back on the 13-14 July 2019 boat, start administering high flow Dive weekend in Swanage, Dorset. and radioing for help from the coastguard. Organiser: Andy Hodgson The cox’n contacted HMS Coastguard who 27-28 July 2019 was able to connect him with the on-call Dive weekend in Portland, Dorset. diving doctor and arrange a helicopter

Organisers: Pete Custerson/Hayley Giles evacuaon. She received connuous O 2 and IV fluids. Whilst awaing the 10-11 August 2019 helicopter, her dive buddies had monitored Dive weekend in Portland, Dorset. her, which showed her condion had Organiser: Jeff Reed progressively improved with high flow 8-15 September 2019 oxygen. This informaon was vital to help Scapa Flow centenary diving, Orkneys. disnguish between inner ear barotrauma and audiovesbular decompression illness. Organisers: Sarah & Pete Custerson On assessment at the DDRC, she had 5-6 October 2019 marked nystagmus, was nauseated with Dive weekend in Portland, Dorset. voming and had perforated her le ear Organiser: Richard Watson/M. Hamilton drum. She was treated at DDRC over 4 days, inially by a 30 m recompression 19-20 October 2019 table, followed by an 18 m table and then Dive weekend in Portland, Dorset. 18 three 12 m tables, eventually making a full Organiser: Alan Brown recovery.