by Jan Willem Bech | Vademecum
Author: Kevin Gurr published with permission Fact Closed-circuit rebreathers (CCRs) are popular in advanced recreational diving owing to advantages such as minimisation of gas consumption and the optimising (reduction) of decompression. Rebreathers recycle expired gas...
by Jan Willem Bech | Vademecum
What are semi-closed rebreathers, and how do they work? Jan Willem Bech When diving with an oxygen rebreather, one of the limiting factors of the system is the dive depth. Oxygen becomes toxic when inhaled at 1.6 bar. When breathing pure oxygen, this is the situation...
by Jan Willem Bech | Vademecum
How the Electronic Closed circuit Rebreather works By Jan Willem BechJanuary 2023 In an earlier article, we read about closed breathing systems that work with oxygen. One limitation was that these system work with pure oxygen and can therefore be safely dived to a...
by Jan Willem Bech | Vademecum
How can you measure the performance of the scrubber? Pete Steggle’s CO2 temperature sensor2005 In 2002 Pete Steggle had his first ideas about building a sensor in his scrubber. Since it is a subject of many misunderstandings I asked Pete several questions about the...
by Jan Willem Bech | Vademecum
A rebreather, and all those bottles too? By Jan Willem Bech05-01-2023 Decompression after a 78 meter dive This page is about side mounted cylinders. This is a subject covered extensively in rebreather training. The information on this page does not aim to replace any...
by Jan Willem Bech | Vademecum
Work of breathing and the counterlungposition De positie van de contralong van een rebreather heeft grote invloed op de ademweerstand. In de op de markt verkrijgbare systemen vinden we verschillende configuraties. Sommige duikers zweren bij een op de borst gedragen...
by Jan Willem Bech | Vademecum
Tips for handling rebreather cylinders safely For my thetis as a safety expert, I spent two years studying safe handling of oxygen under high pressure. It is therefore very tempting to write very extensively on this subject. However, the purpose of this page is to...
by Jan Willem Bech | Vademecum
What material is used and how are they made? There is a huge amount to be said about diving cylinders. On this page, I will discuss the various production methods and types of material used for diving cylinders.There are an endless number of pages on the internet with...
by Jan Willem Bech | Vademecum
Back to in-depth page Why are some rebreathers equipped with one bottle while others have two? This logical question is quite difficult to answer. Sometimes there are technical reasons, sometimes operational reasons to opt for a single or double cylinder. Let’s...
by Jan Willem Bech | Database Passive addition rebreathers
Respiration-controlled, semi-closed systems Tekst by Jan Willem BechDecember 2022 After years of reading about rebreathers, a breath-controlled rebreather remains an intriguing system. It therefore took me a long time to understand the system in terms of concept. Most...
by Jan Willem Bech | History
us Early deepsea underwater exploration of the 60’s SEALAB I-II and III were experimental underwater habitats developed by the United States Navy in the 1960’s to prove the viability of saturation diving and humans living in isolation for extended periods...
by Jan Willem Bech | Database SCR Canada
ca Hydrospace MARK IX semiclosed rebreather system 1966 This graphically heavy page is about the development of Hydrospace developments’ Mark IX diving system. A most extraordinary story about a genius inventor who suffered considerable setbacks in his life. The...
by Jan Willem Bech | Database ECCR USA
us The CCR 2000 was designed by Boeing engineer Dan Wible from the USA. The rebreather had particularly modern features and was ahead of its time in many areas. Dan Wible is an inventor with an engineering background and a passion for SCUBA diving . He began diving at...
by Jan Willem Bech | Database ECCR UK
gb Royal Navy EOD rebreather UCI Editor John Bevan visits Divex in Aberdeen to try out the Stealth rebreather, and to look at other products the company makes for the military diving market. Following a period of steady decline in the offshore diving industry,...
by Jan Willem Bech | Database ECCR UK
gb ECCR Used by NASA space program Brent Hudson from Narked at 90 kindly offered me this information about the legendary Undersea Technologies UT 240 rebreather. Here you find photos and information about this absolute unique rebreather!I would like to say...
by Jan Willem Bech | Database ECCR UK
gb Before the Undersea Technologies UT-240 Oceanic announced the Phibian Oceanic is an American manufacturer of scuba gear. It was founded by Bob Hollis in 1972 and is based in San Leandro, California, United States. Its products include dive computers, rebreathers...
by Jan Willem Bech | Database ECCR UK
gb A modified early ECCR The Kraken-C2 rebreather tekst by Sharon Readey 11-11-2022 Stuart Clough founded Carmellan Research Ltd in the UK in 1983 (and it was dissolved in 2000). Carmellan was operating CCR155s since 1984 and then they modified them with proprietary...
by Jan Willem Bech | Database SCR Germany
de Dräger 90’s sportsrebreather semiclosed In the mid-1990s, Dräger launched the Atlantis 1 semi-enclosed rebreather. Shortly afterwards, the model became the Dolphin rebreather. The rebreather was widely sold by a huge number of dealers which increased to a...
by Jan Willem Bech | Database Semiclosed Rebreathers
de Escape Mixgas rebreather from 60 m Dhe TR60 also called escape rebreather is a semi-closed device for escaping from depth. The gas flow and composition of the gas is set to allow the user to stay at 60 meter, e.g. to swim out of a hatch. Due to the semi-closed...
by Jan Willem Bech | Database SCR Germany
de Escape Mixgas rebreather from 66 m Dhe TR66 also called escape rebreather is a semi-closed device for escaping from depth. The gas flow and composition of the gas is set to allow the user to stay at 66 meter, e.g. to swim out of a hatch. Due to the semi-closed...
by Jan Willem Bech | Database SCR Germany
de Escape Mixgas rebreather from 75 m Dhe TR75 also called escape rebreather is a semi-closed device for escaping from depth. The gas flow and composition of the gas is set to allow the user to stay at 75 mter for 4.5 minutes, e.g. to swim out of a hatch. Due to the...
by Jan Willem Bech | Database SCR Germany
de Hose dependent Mixgas rebreather The Tubox is similar in model to Dräger’s LAR series. However, this unit is constructed as a device with an umbilical.The user has to choose if he uses pure oxygen or EAN60. The gas fed by the umbilical should be the same as...
by Jan Willem Bech | Database SCR Germany
de Hose dependent Mixgas Swimmdive unit with bypass This rebreather is equipped with a 1 litre backup cylinder filled with 200 bar.o Brother unit SMS1 has another way the diver is supplied with gas. The SMS1 is a tethered system where the pressure is regulated in the...
by Jan Willem Bech | Database SCR Germany
de Hose dependent Mixgas Swimmdive unit This rebreather is equipped with a 1 liters backup cylinder filled with 200 bar.o The Constant Mass Flow will work to max 40 bar, therefore 160 liter gas is available. Since 8 min dive time is referred to the flow will be 20...
