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  • Innerspace Porpoise Pack 1
    equipment OK here are photos all made by Stefan Besier I want to thank him for this great job he did Stefan I hope people will enjoy your professional work and also value your free of charge cooperation Here are three units with consecutive serial numbers 350 352 They each have their own very heavy duty steel case with thick custom soft carry bag I ll show them in the order I photographed them helmets first then the rigs and finally the spare kits As you can see there is a separate metal case for the helmets which in also each have their own soft carry bag The bags are color coordinated with the ones for the rigs and are made from the same heavy duty material Innerspace s logo is on the inside and the bags are perfect fits The helmets were contracted from Aquadyne and then adapted for the use with the PP 1 Solid commercial hardware note Janwillem the helmets where a model Aquadyne DMC 7 adapted to fit the PP 1 The rigs in their transport metal cases wrapped inside the padded soft carry bags Very well done As you can see these were owned and used by the International Marine Petroleum Company for commercial oil work Which explains the ragged look they were working rigs What about this very early hammer head Picture 710 The box that contains the battery on top and has the analog electronics on the bottom Also the primary wrist display with its warning lights A larm L ow pO2 0 1 below setpoint O n setpoint 0 1 above setpoint H igh pO2 Finally two secondaries side by side The yellow one was originally used with the PP 1s but they had problems with the material and switched to the black display made from different material As you can see in 710 the PP 1 had a solid handle and screw on caps to close the loop when removing the hoses Two items frequently missing on modern rebreathers The two contends gauges even have a tie down for transport 713 716 Here two pictures of the rig standing up You can clearly see the simple but heavy duty harness and the equalizing holes in the case that allow the counterlung to move On the side metal latch and manual add button In frame 713 you can also see the power switch next to the D ring on the case diver s left side 716 with the cover removed The flasks are steel between them on the bottom the space for the electronics module In the upper space between the flasks is the solenoid above the accumulator Underneath the flasks is the ss pipework with filters and manual add valves 718 719 720 721 The center section undeniably the best and most unusual design feature of the PP 1 MK series and whatever other name they marketed by 718 shows has just the locking nut removed the sensors holder is visible

    Original URL path: http://www.therebreathersite.nl/05_Reviews/innerspace_porpoise_pack_1.htm (2016-05-02)
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  • Arawak System
    Description Penzias Goodman 1973 The Tethered ARAWAK Sytem This apparatus is used for lateral and limited vertical excursions from subsurface diving bases Supply and vacuum pumps compressor depressor situated inside the diving habitat provide chamber gas to the diver and via a second hose return it to the habitat for carbon dioxide removal and processing with the atmospheric purification equipment located there The Arawak gas circuit constitutes a satellite appendage of the subsurface base it is a rebreathing apparatus without carbon dioxide removal capability and is a closed circuit mixed gas apparatus without self monitoring devices or automated mixture control The compensatory advantages which this system provides include the following simplicity of predive preparation diver monitoring and post dive maintenance economy in procedurement and operational costs augmentation of diver safety conferred both by restrictions implicitly imposed with a tether as well as by engineering features already mentioned History of development The Arawak system is designed by Wilbur J O Neill assignor of Westinghouse Electric Corporation Pittsburg The equipment is sold by Emerson and later by Reimers Engineering Finally Divex UK bought the Arawak system Wanted information The system seems to have two backup systems One of them seem to work as a semi closed system Since the goal of the system is to not have the diver wearing a scrubber this seems strange to me I would like to have the user manual or detailed photos of the system and backpack of the diver I would like to invite everybody to sent me additional information Most wanted are actual photos of the divers using this system Introducing the ARAWAK V Patented 1968 3 370 585 The Divex designed ARAWAK V is a closed circuit push pull diving system that supports the saturation diver in depth of water from 200 to 1 500 feet 65 500 meter Using the 15 years of Emerson and Westinghouse closed circuit pump and valving technology recently acquired by Divex as a point of departure the Arawak V is a advanced closed circuit system designed for commercial use The first operational application of this push pull concept was during Sealab I and II in the Arawak I and II equipments With Divex improvements Arawak V is a linear descendent of that Arawak family of diving systems In the Arawak V breathing gas is taken from the atmosphere of a saturation system whether PTS or submersible and pumped to the diver through an umbilical Diver exhaust gas in turn is pumped back to the bell for CO2 scrubbing reconstitution and reuse The system employs gas heating in the supply line Two independent emergency gas systems are provided In addition to the supply and return hoses Major concerns in system design are diver safety comfort and mobility The basic system is configured for one diver and multiple systems may be employed in a specific application Characteristics Operational Gasflow 4 5 ACFM Depth Minimum 200 FSW Maximum 1500 FSW Excursion Bell Up 33 FSW Down 100 FSW Physical Weight

    Original URL path: http://www.therebreathersite.nl/SemiClosed%20Rebreathers/UK/arawak_system.htm (2016-05-02)
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  • Divex SLS Mk IV
    not rely on the Primary Breathing System Smaller than most deep diving bail out systems Overcomes the threat of sodalime cocktails through a unique positive pressure system The Divex Secondary Life Support SLS System is an emergency breathing apparatus intended for the use in the event of a fundamental failure of a diver s primary life support umbilical Designed in response to the acknowledged need to enhance diver safety as man works to extreme depth in the world s most hostile environments It operates on a semi closed circuit rebreather principle independent from the primary system The SLS System provides the diver with a minimum supply of 13 5 minutes of breathing gas heliox at a rate of 62 51 RMV litres per minute which satisfies Norwegian Petroleum Directorate NPD Regulations 1995 Section 38 Comprising a self contained backpack and Helmet that have been the subject of considerable development The picture shows the SLS Mk IV fitted to a Divex Ultrajewel 17c Gas Reclaim Helmet fitted with SLS interface Design Improvements Feedback from the users of the SLS System since it was introduced has resulted in several design changes that have enhanced performance diver comfort and safety This brought about the introduction of the Mk II in 1988 the SLS Mk III in 1992 with the super flexible over the shoulder inhale and exhale hoses and the current and most advanced version in 1996 the SLS Mk IV The main areas of change are a Improved serviceability of the redesigned backpack housing and scrubber housing b Improved scrubber door sealing arrangement and strengthened door c Refillable scrubber canister with screw on cap that is easier to fill d Positive pressure indicator Rotowink that allows the diver to visually check the integrity of the system e Improvements to harness and actuation system f Anti silt protection Training and Safety It is essential that personnel both operating and maintaining the SLS System are completely familiar with all operational and maintenance procedures Divers should have attended a suitable Training Course and be totally comfortable and competent in the operation of the equipment whilst technicians should have completed the three day SLS System Training Course Check out the NEDU test facility movie size 5 MB you need Windows Media Player or other suitable player Click the NEDU button MOVIE MOVIE UPDATE 15 March 2005 The SLS Secondary Life Support Author Åke Larsson The Secondary Life Support system SLS made by DIVEX UK is a breathing system for deep diving operations where the diver descends to his working place in a diving bell and then locks out from the bell and performs his tasks at a depth reasonably close to the lockout depth The primary system is a normal deep diving version of the Kirby Morgan helmet which is an open circuit demand system preferably equipped with a gas reclaim system in order to save gas The bail out system in designed to help a diver to get back to the diving bell without being

    Original URL path: http://www.therebreathersite.nl/SemiClosed%20Rebreathers/UK/divex_sls_mk_iv.htm (2016-05-02)
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  • Cis Lunar MK1
    1987 Wakulla Springs Project he was certified in cave diving in 1989 and has since been responsible for the discovery and initiating the exploration of five virgin cave systems in the Woodville Karst Plain Wakulla Spring s home geological region You can read more about him here Sorry about the brown car in the background that was Wes Skiles family Honda and mobile production vehicle in 1987 Earlier pictures showed

    Original URL path: http://www.therebreathersite.nl/11_Closed%20Circuit%20Rebreathers/cis_lunar_mk1.htm (2016-05-02)
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  • Stingray and Abyss Part 1
    known other rebreather builder has been very active during many years Kerry did not only build his own rebreathers but advised hundreds of divers in how to achieve there goals Kerry is one of the pioneers in rebuilding SCR rebreathers to CC rebreathers using his own developed metering valves One of his units has been described on my web here http www therebreathersite nl evolution of a rebreather htm Now these pioneers have found each other and decided to join hands They started a new cooperation called Rebreathers Australia Goal is to produce rebreather parts and offer them to homebuilders One of the first things to realize is offering the StingRay and Abyss CC rebreather as a kit The Stingray is a small sports CC rebreather and can be equipped with two liter bottles Gas supply can be chosen by the builder It can be Kerry s metering valve system or a Kiss sytem The project is far from finished and on the diveshow in Australia only prototypes were showed The units look very nice and there are rumors the kits are available end this year The StingRay rebreathers weights 18 19 kilo has a fiberglass case Hoses are in

    Original URL path: http://www.therebreathersite.nl/11_Closed%20Circuit%20Rebreathers/stingray_and_abyss_part_1.htm (2016-05-02)
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  • Stingray and Abyss Part 2
    hopefully the diver will not be using it at the time I mentioned this because there have been too many accidents with electronics and battery failures etc After diving for over half a century it is the first time in my life that I have felt at one with the ocean Diving the Abyss is a dream to use History of the ABYSS CCR The ABYSS rebreather is a passive injection adjustable to the divers O2 respiration rate closed circuit rebreather Its development began six years ago using electronics to drive it in the beginning One day whilst diving a German O2 rebreather which had a constant flow of 9 Lt per minute I suddenly realized I hadn t hit the O2 add button for over one hour the over pressure relief valve had not exhausted indicating my O2 respiration rate was matching that of the rebreathers set rate I spent some time considering how to incorporate this system in a mixed gas CCR After experimenting with small jets and different orifices I eventually found a needle valve to suit my requirements perfectly The next step was to streamline the system and to make it user friendly THE ABYSS CAN BE STRIPPED VERY QUICKLY The CO2 canister can be recharged with fresh absorbent on site in minutes and reassembled to dive again I have dived the unit with nearly one litre of water in the exhaust bag DSV mouth piece loose in the mouth to permit this leakage and the unit still functioned perfectly In the last two years of diving this unit I have never had to alter or re adjust the set point of 9 Litre per minute The unit has a 15 micron filter to protect any contamination of the needle valve Some may consider this to be an over kill but I would ask the reader to consider how many times the jets of the Dragger Dolphin SCR was found to be blocked by salt and the flow rate either stopped completely or was interrupted My own personal unit is all carbon fiber including cylinders and can hold 50 cf cylinders and is extremely light It was developed so I could spend a week away diving at my favoriete dive site Kangaroo Island and not have to be concerned about refilling 20 hours of diving approx with a fill pressure of 4500psi Regards Errol Here you see several prototypes and right is Mike Wescombe Downs modelling the Abyss at Oztek with Errol to the left of picture Everything on this rebreather has been hand made from tooling manufactured by Errol Harding The cases are carbon fibre and an emphasis was placed on weight as you will see in subsequent pictures where Errol is now using Fibre Wrap cylinders Left Mike modeling the Abyss from the front and right as side view of the unit Both left and right views of the scrubber canister complete with sensors and Gordon Smiths O2 gauges Errol has used a number

    Original URL path: http://www.therebreathersite.nl/11_Closed%20Circuit%20Rebreathers/stingray_and_abyss_part_2.htm (2016-05-02)
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  • Tourill MK 1.5
    changes in the unit the Tourill MK 1 5 was born So let s do a teardown Here you see the unit complete with gas switch block and DSV in the frame This is the new frame which is very stable and electro polished for corrosion reasons One of my frames with 40cu ft tanks used for shallow lake diving Since I use this frame only in fresh water it is not electro polished only pickled To bridge the tanks I use the standard way Two isolation manifolds with Swagelok pipe connectors The unit without the frame The gas switch block is shown here The hoses between switch block and the unit are without o ring sealing The 90 connectors are made in the same way and are also provided with the unit To drive the gas switch block I use standard QC6 connectors with adapters made by Swagelok If you drill the 9 16 UNF adapter to 9 5mm it fits perfect a standard low pressure hose The DSV The threat s in the union nut s are coded to prevent the user to mount the DSV in the wrong direction To open the unit just turn the head 1 5 3 times and pull it The exhaled gas flows between the scrubber canister and the body through the Dräger one way mushroom valves By using this way of gas routing the scrubber is better insulated when you are diving in cold water environments If you look into the unit you can see both the gas addition valves the valve lifters the overflow pips and in the center the one way valve cover which is also used as the close mechanism The pipes prevent the Water to get in the large bellow It flows from the tapered area in

    Original URL path: http://www.therebreathersite.nl/05_Reviews/tourill_mk_1_5.htm (2016-05-02)
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  • Megalodon in Holland
    to place the display straight before your face in order to read the numbers and letters The calibration itself goes without problems however it was new to me that the calibration for the secondary display has to be done separately It appears that the Megalodon has no redundant computer system and the secondary display therefore really functions as a second display Je moet het display dus echt recht voor je gezicht houden om de cijfers en letters goed te lezen De kalibratie verloopt moeiteloos maar wat mij opviel is dat de kalibratie apart voor de secondary display moet worden uitgevoerd Nu blijkt dat de Megalodon geen redundant computer systeem heeft en de secondary display dus echt als second display dient The secondary display cannot control the solenoid To clarify the calibration of master and secondary display are done simultaneously in the Inspiration rebreather This calibration takes place with 100 oxygen after which master and secondary display show the measured values De secondary display kan dan ook niet de solenoid aansturen Ter verduidelijking bij de Inspiration worden zowel de master als de secondary display in een handeling gekalibreerd Deze kalibratie vindt plaats met 100 zuurstof waarna zowel de master als de secondary display de gemeten waarden doorgeven When the master controller fails the secondary display takes over the function of the master Also the secondary display takes over control in case the battery of the master is not able to control the solenoid This redundancy offers an extra piece of security and enables the diver to stay on CCR mode longer For the Megalodon the unit does not offer this redundancy When the primary handset is broken the reading on the second offers the diver the possibility to abort his dive in manual controlled CC or SCR mode Als de master regelaar defect raakt neemt de secondary display de functie van de master over Ook als de batterij van de master niet meer in staat is om de solenoid aan te sturen neemt de secondary display de aansturing over Deze redundantie biedt een stukje extra zekerheid en laat de duiker langer op CCR duiken Bij de Megalodon is gekozen voor een andere aanpak Als de besturing om welke reden dan ook defect gaat kan de duiker in SC of CC handbediende modus de duik beëindigen The Megalodon has a primary that controls the solenoid and a secondary display that displays cell readings If the primary is broken there are still the PO2 readings of the cells however the secondary display won t fire the solenoid and one has to switch to manual operation For a well trained CCR diver this not really present a problem De Megalodon heeft dus een primary die de Solenoid aanstuurt en een secondary display die de cel readings weergeeft Als de primary uitvalt is er nog wel een uitlezing van de pO2 per cel maar geen sturing meer en moet worden overgeschakeld naar manuele bediening Voor een beetje CCR duiker echter geen enkel probleem The primary handset indicates the oxygen sensor values The Innerspace Systems Corperation has put a reliable controller on the market with the 2 01 Apecs software The setpoint can vary from 0 4 to 1 4 bar oxygen pressure New in the Apecs software is the solenoid test During set up three solenoid injections are carried out that will enable the user to determine the functioning of the solenoid De primaire handset geeft de zuurstof sensor waarden De Innerspace Systems Corperation heeft met de versie 2 01 Apecs handset een betrouwbare controller op de markt gezet Het setpoint kan worden ingesteld tussen 0 4 en 1 4 bar zuurstofdruk Nieuw in de Apecs software is de solenoid test Gedurende de setup worden drie solenoid injecties uitgevoerd die de gebruiker in staat vast te stellen dat de solenoid functioneert The Megalodon can be equipped with a Head Up Display 225 During set up the HUD is tested by means of a self diagnosis however the diver can perform the same test via the secondary during the dive at any given point in time De Megalodon kan worden uitgerust met een Head Up Display 225 G edurende de setup wordt de HUD middels een zelfdiagnose getest tevens kan de duiker gedurende de duik via de secondary dezelfde test uitvoeren op elk gewenst moment An advantage of the Megalodon is that it does not have the often discussed switches of the Inspiration and the controlling electronics altogether have been placed in the scrubber lid In case a cable or wire is destroyed no water can enter the scrubber The inspiration however has an ambient system by which the hose to the handsets is under pressure of the loop Een voordeel van de Megalodon is dat de veel besproken schuifschakelaars van de Inspiration afwezig zijn en de sturende elektronica geheel in het scrubber deksel is geplaatst De bekabeling is zo uitgevoerd dat indien een kabel word vernield er geen water in de scrubber kan komen De Inspiration heeft daarentegen een omsluitend systeem waarbij de slang naar de handsets onder druk van de loop staat Ambient Pressure Diving has applied this advantage in and has built a fibre optic system in its new Vision electronics for the Head Up Display Now the wrist set is not a part of the loop anymore but is still wired to the electronics The Vision also has all the electronics potted i e watertight sealed in the scrubber lid The Vision wrist set displays both controllers as does the 2 x HUD light sets i e 3 independent displays in total The Vision handset is at ambient pressure but it is done quite differently to the Classic version of the Inspiration The Vision wrist set is gel filled like the mass production dive computers and is maintained at ambient by a flexible panel built into the handset Ambient Pressure Diving heeft dit voordeel echter ingezien en heeft in zijn nieuwe Vision electronics een fiber optic systeem toegepast voor de HUD The

    Original URL path: http://www.therebreathersite.nl/05_Reviews/megalodon_in_holland.htm (2016-05-02)
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