by Jan Willem Bech | Gallery
In 2011 we dived with MS Dolfijn, a former patrol ship of the Dutch customs, near Lowestoft UK. We left Maassluis in the Netherlands on Sunday morning and arrived Sunday evening in Lowestoft. This coast town is the most eastern city of the UK. When we arrived the...
by Jan Willem Bech | Database ECCR USA, History
back to ECCR USA Explanation of the energy balance by physicist Halbert Fischel CLOSED-CIRCUIT CRYOGENIC SCUBA Halbert Fischel Sub-Marine Systems Corporation A Sterling Electronics Company Chatsworth, California 913111970 ABSTRACT Rebreathed gas is partially routed...
by Jan Willem Bech | Gallery
This page is dedicated to the best thing there is. Ice-diving in Holland. Unfortunately the last 12 years the winters where not cold enough to make us a good old 6″ of ice. Now after all these years today we had the opportunity to make a very nice dive in a cold...
by Jan Willem Bech | Gallery
This year we planned to dive near Helgoland (Heligoland). Helgoland has a incredible number of shipwrecks and is a paradise for the diver. Unfortunately this year we did not dive Helgoland due to extreme wind force. Due to the whether conditions we had no choice then...
by Jan Willem Bech | History
Aegir underwater Habitat 1971 AEGIR 1971 The Aegir habitat was capable of supporting six divers at depths of up to 580 feed for as long as 14 days. The personnel chamber consisted of three compartments: living, control and laboratory. The living and laboratory...
by Jan Willem Bech | Gallery
In 2004 I went on a diving weekend in Plymouth UK with Ivo, Tino and Rita. The weekend was organised by AP Diving and promised to be a fun outing. On site we met many people we knew and had a wonderful diving...
by Jan Willem Bech | Gallery
In 2003, we started rebreather diving in the North Sea. After having noticed that diving with the Dräger Atlantis did not offer us the desired dive times, we quickly switched to the Inspiration. During these first rebreather dives at sea with John and Ivo it was soon...
by Jan Willem Bech | Gallery
In May 2003 I had the opportunity to do my closed circuit trimix course in the South of France. Course leader was Dave Thompson. Rob Postma did his ECCR trimix instructor course, and we did the ECCR trimix course. The photo’s are screen...
by Jan Willem Bech | Gallery
In May 2005 we planned a dive session during 5 days in the Southern part of France. The Dives were made by 5 Dutch Inspiration divers, and one Inspiration/ Kiss diver. Members of the team where: Ivo van Dam, Tino de Rijk, Rita Oosterbaan, Arjan van Waardenburg, Rob...
by Jan Willem Bech | Gallery
May 2006. I am very pleased to show you pictures of our divingtrip to the Red Sea. This trip had no other goal than looking at the wonders of nature. We left Amsterdam Thursday 18 may 2006 and arrived at Port Galet near Marsa Alam, Egypt during the evening. Marsa Alam...
by Jan Willem Bech | Database OX JAP
World’s most compact semi-closed rebreather The Japanese EOBA (Enriched Oxygen Breathing Apparatus) is in fact a semi-closed system. This is because the mix in the mini cylinders contains 80% oxygen and 20% Nitrox. The reason for this is that you can dive a...
by Jan Willem Bech | Database OX USA
The Westinghouse 9-SO-R2 Min-O-Lung The 9-SO-R2 MIN-O-LUNG was produced by the Westinghouse Electric Corp of Annapolis, MARYLAND, in 1964. Westinghouse later purchased most of Emersons underwater contracts and designs, including their mixed gas closed...
by Jan Willem Bech | Database OX USA
Manual controlled mass flow oxygen rebreather picture thank to P. Duffy Emerson 1963 9-SO-3 oxygen rebreather This page describes the brother of the Scuba-lung from Emerson. The identical rebreather distinguishes itself by a different gas dosing system. The 9-SO-3...
by Jan Willem Bech | Database OX USA
On demand Emerson oxygen rebreather Here is a page about a unique rebreather with an on-demand system built into the contralong. This specific model with the abstract name 9-SO-21 was also called Scuba-Lung. The oxygen system with separate contralungs had a double...
by Jan Willem Bech | Database SCR USA
US Navy workhorse Emerson was a major influence in the development of US Navy UBA’s (underwater breathing apparatus) during the 1950-60’s, they collaborated with Dr Lambertsen to mass produce his Lambertsen Amphibious Respiratory Unit (LARU), the LARU (not to be...
by Jan Willem Bech | Database ECCR USA
World first ECCR with galvanic sensor ‘Scuba Lung’ Text: Jan Willem Bech 30-06-2022 picture thanks to Sharon Readey In the year I was born, 1961, a 27-year-old student in Massachusetts tested his revolutionary invention and found it successful. Alan...
by Jan Willem Bech | Database OX USA
WWII LARU oxygen rebreather Dr. Christian J. Lambertsen received a B.S. Degree from Rutgers University in 1938 and a M.D. Degree from the University of Pennsylvania in 1943. During his medical school period, he invented and first used forms of the initial U.S....
by Jan Willem Bech | Database OX USA
A rescue mask that has been in use for more than 75 years The Chemox is a chemical-Oxygen , closed-circuit apparatus with a disposable KO2 canister. It was certified by the USBM in 1946 as a 1-hr breathing apparatus. Because it was certified for less than...
by Jan Willem Bech | Database OX USA
Gibbs 2 hours apparatus Bureau of Mines USA Text Jan WIllem Bechrewrite june 2022 Photo thanks to Mr. Dave Johnson of http://miningartifacts.homestead.com/ Working principle of the GIBBS TWO HOUR APPARATUS Introduction The Gibbs 2-hour apparatus was designed by...
by Jan Willem Bech | Vademecum
Diving and behavior of gases First Gas Law Robert Boyle discovered as early as 1662 that the pressure and volume of a gas had a constant relationship. His invention is also called the first gas law. French physicist Edme Mariotte (1620-1684) discovered the same law...
by Jan Willem Bech | Vademecum
Switchable mouthpieces for rebreathers. A first step towards the modern bailout valve A Bail Out Valve (BOV) is a Diver Surface Valve (DSV) that has a second stage regulator incorporated into the mouthpiece and is connected to either the onboard diluent tank or the...
by Jan Willem Bech | Database ECCR USA, History
us Controlling your breath with polariographic oxygen sensors in 1968 This article, written by Walter Starck, was made possible thanks to the cooperation of Mr R. Bakker and with photos by Sharon Readey. I would like to thank them very much for that. Any additional...
by Jan Willem Bech | Vademecum
A rebreather must pass exhaled gas through a scrubber to remove the CO2. The consequence of this is that the gas flow must be directed in a certain direction. Only on a pendulum breathing apparatus will the gas pass through the scrubber in a pendulum fashion,...
by Jan Willem Bech | Vademecum
Rebreather FFM for additional safety and comfort When diving with rebreathers, the use of a full face mask is an important safety feature. The prerequisite is that the user is properly instructed in how to use the mask. Not all masks that are suitable on land can also...
