by Jan Willem Bech | Vademecum
This page is to add some story’s on rebreather blunders and malfunctions. It is here to tell stories of mistakes that can be made by all rebreather divers. I hope it will be helpful to learn how mistakes can be avoided. Index: Rebreather blunders and...
by Jan Willem Bech | Vademecum
This page is about cylinder connections in the Netherlands only! Hier de in Nederland gangbare flesaansluitingen
by Jan Willem Bech | Vademecum
Diving systems and oxygen fire Rebreathers and oxygen fires In technical diving, we use enriched but also degraded gases. As a result, technical divers will face the risk of oxygen fire. This risk is generally underestimated because, fortunately, oxygen fires are...
by Jan Willem Bech | Vademecum
A most interesting story about the search for the cause of hyperoxia A great book, but a collectors item.. An excerpt from a fantastic book Oxygen and the diver by KENNETH DONALD THE ADMIRALTY EXPERIMENTAL DIVING UNIT After serving as Flotilla Medical officer in the...
by Jan Willem Bech | Vademecum
This pages contains information about very dangerous diving systems. CMF systems are very dangerous in the hands of those who do not understand the system. This information is not a guide to build your own system. It explains some views about diving technology....
by Jan Willem Bech | Vademecum
Back to homebuilders MCCR in depth Introduction: During the last years a in some ways new form of rebreather diving has been introduced. MCCR diving (manual controlled closed circuit diving) is a fast growing group in the rebreather diving community. The technique is...
by Jan Willem Bech | Vademecum
In the early 21st century, I read a lot about Dr Richard Pyle. As a pioneer of diving in the twilight zone, I was therefore delighted to receive the article below from Richard with permission to publish it on my website. It is a very valuable article intended for all...
by Jan Willem Bech | Vademecum
The Hydrogom CMF valve Hydrogom is a Dutch based company specialised in the production and sale of the hydrogom CMF valve. Therebreathersite is a dealer for selling these valves to interested rebreather diver. So if you are interested, please send me an email and i...
by Jan Willem Bech | Vademecum
Principles of Constant Mass Flowor How does the Dräger Dolphins rebreather work? Article by Nevil Atkins, published with permission, first publication 2010 After the publication of Jan Jahns article on gasflow through an orifice, Nevil Adkins wrote me that he...
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...
