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Second edition of John Lamb’s ‘Oxygen Measurement for Divers’ published

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There are a number of seminal texts that ought to be on every serious divers bookcase.

  • Deco for Divers
  • Diving and Subaquatic Medicine
  • Diving Physiology in Plain English
  • Underwater Photography Masterclass

These easy-to-read books provide in-depth accurate information – they are ‘gold standard’ diving reference books.

A critical addition to this list has just been published. John Lamb’s second edition of ‘Oxygen Measurement for Divers’.

Lamb has augmented his original book, with a big emphasis on closed circuit rebreathers. When the first edition was published in 1999, CCR recreational diving was very new; hence the rebreather section was only four pages long. This updated edition is stuffed full of nuggets of significant information that every rebreather diver needs on oxygen sensors in rebreathers. It promises to become the “go to book” for all rebreather divers.

Sensors, like sharks, have suffered from some bad PR. Lamb succinctly covers key topics, explaining in plain English the reasons for sensor failure:

  • the effects of temperature, humidity and pressure
  • sensor accuracy and stability
  • testing sensors
  • Do’s and Don’t s
  • how to determine the end of a life of a sensor
  • advice for looking after your sensors

‘Oxygen Measurement for Divers’ is remarkably readable. It has been designed for divers to pick it up and dip into it. To check information. To look up answers. And it has achieved the happy balance of having a good technical aspect whilst remaining useful. The explanations are very clear and, even when describing complex principles, are structured in a very understandable way.

What quietly comes across is the author’s huge knowledge on the subject. John Lamb has over 40 years of practical experience in the field of oxygen measurement and monitoring, from medicine to technical diving applications.

“When it comes to oxygen sensors there are lot of myths and misinformation available at the touch of a key,” stated author John Lamb. “This book provides accurate information, direct to the divers, with the prime aim of increasing their personal knowledge and safety. It covers everything you ever wanted to know about oxygen sensors and oxygen, but didn’t know who to ask.”

Whilst updating this book Lamb called upon other experts in this field – Kevin Gurr, Martin Parker, Paul Raymaekers, and Dave Thompson, amongst others, and asked them to contribute to this edition.

John Lamb’s book, “Oxygen Measurement for Divers” is exactly what we have been waiting for. This book is a must read for any diver using any form of oxygen analyser, whether it is in a simple Oxygen Analyser or in a complex rebreather. – Paul Toomer, Director of Diver Training, RAID Diver Training Agency

This is an invaluable resource and should be compulsory reading for any rebreather diver. – Mark Powell, SDI /TDI / ERDI Training Advisory Panel

‘Oxygen Measurement For Divers’ can be purchased in two formats: as a paperback, direct from Vandagraph (www.vandagraph.co.uk) for £15.00. Or, as a Kindle book for £7.50.

John Lamb’s first edition, ‘The Practice of Oxygen Measurement For Divers‘ is also available via Amazon.

Roz is the Founder of The Underwater Marketing Company, Co-founder of EUROTEK, and established TEKDiveUSA. She is a PADI IDC Staff Instructor, a BSAC Advanced Instructor, and a rebreather and Trimix diver. Before moving into the PR field she worked as a full time recreational instructor in the UK and abroad, on History Channel and National Geographic documentaries, as a safety diver, and modelled underwater.

Gear News

Introducing the TR-80, IR-50 and CS-30 Regulators from DYNAMICNORD

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Whether you are a beginner or a professional diver – with the three new main regulators from DYNAMICNORD, everyone will find their favourite regulator. They all look super stylish.

Excellent performance with the TR-80

Quality and performance are the be-all and end-all for regulators. It is not for nothing that the TR stands for Tec Reg. The innovative design of the TR-80 guarantees absolute reliability – even in ice-cold waters.

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Perfect breathing effort at 0.8 J/l / certified for diving in waters below 10 degrees / structural design made of solid brass for best cold protection / membrane-compensated design with dry seal of the first stage / reduced exhalation effort thanks to optimized exhalation membrane and bubble deflector / adjustable Venturi (dive/predive) and adjustment knob for individual inhalation comfort / innovative design of the front cover prevents free-flow in strong currents or when diving with scooters / design made of sandblasted brass, matt chrome finish / 2 HP and 4 LP outlets / mouthpiece made of high-quality, anti-allergic silicone for maximum comfort.

regulator

Amazing underwater adventures with the IR-50

The IR-50 is the top regulator for advanced and experienced divers. Natural breathing is the essence of this regulator.

regulator

Ideal breathing effort at 0.8 J/l /certified for diving in waters below 10 degrees / compensated membrane / adjustable venturi (dive/predive) and adjustment knob for individual inhalation comfort/ outlet valve and deflector for minimum exhalation effort and reduction of bubbles on the face / design made of sandblasted brass, matt chrome finish / 2 HP and 4 NP outlets / mouthpiece made of high-quality, anti-allergic silicone for maximum comfort.

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The Workhorse – our CS-30

For diving centres and diving beginners – the workhorse stands for strong construction, reliability and robustness. Perfect for your training.

regulator

Optimal breathing effort at 0.8 J/l /recommended for diving in waters above 10 degrees / non-compensated piston / adjustable venturi (dive/predive) / outlet valve and deflector for minimum exhalation effort and reduction of bubbles on the face / design made of sandblasted brass, matt chrome finish / 1 HP and 3 NP outlets / mouthpiece made of high-quality, anti-allergic silicone for maximum comfort.

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Octopus OP-30

The OP-30 is the ideal addition to all DYNAMICNORD regulators. It is identical in construction to the CS-30.

regulator

The TR-80, IR-50, CS-30 (DIN & INT) regulators and the Octopus OP-30 are available from DYNAMICNORD dealers and in the online store.

DYNAMICNORD – Your Outdoor Companion.

www.dynamicnord.com

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Marine Life & Conservation

Paul Watson Released as Denmark Blocks Japan’s Extradition Bid

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paul watson

Renowned anti-whaling activist Paul Watson has been released from custody in Greenland after spending five months in detention. Denmark’s Justice Ministry rejected Japan’s request for his extradition, citing insufficient guarantees that his time already served in custody would be credited against any potential sentence.

The 74-year-old Canadian-American was arrested on July 21 in Nuuk, Greenland’s capital, when his ship docked to refuel. His arrest was based on a 2012 Japanese warrant related to a 2010 encounter in Antarctic waters. Japan alleged Watson obstructed operations and caused damage to a whaling research ship during efforts to disrupt illegal whaling. Watson has consistently denied these claims, maintaining his commitment to marine conservation.

Denmark, which oversees extradition matters for Greenland, concluded that while the legal conditions for extradition were met, the lack of assurances from Japan regarding time-served credit made extradition untenable.

In a video shared by his foundation, Watson expressed gratitude and relief, saying, “After five months, it’s good to be out… and good to know they’re not sending me to Japan.” He added that the most difficult part of his time in custody was being separated from his two young sons.

Watson is a pioneering figure in marine conservation, known for founding the Captain Paul Watson Foundation in 2022 after decades of activism with the Sea Shepherd Conservation Society. His bold efforts to defend marine life have earned him widespread support, including from celebrities and conservationists. His work has also been featured in the acclaimed reality TV series Whale Wars.

Watson’s lawyer, Jonas Christoffersen, praised the decision, stating, “We are happy and relieved that Paul Watson is now free.” He added that Watson is eager to reunite with his family and continue his vital work.

The arrest occurred while Watson’s vessel, the M/Y John Paul DeJoria, was en route to the North Pacific with a team of 26 volunteers to intercept a Japanese whaling ship. His foundation described the arrest as politically motivated and emphasized that Watson’s actions were focused on ending illegal whaling practices.

Japan resumed commercial whaling in 2019 after leaving the International Whaling Commission, asserting that whale meat is a cultural tradition. Conservationists, however, continue to challenge these practices, highlighting their impact on marine ecosystems.

Despite the challenges, Watson remains steadfast in his mission to protect marine life and bring attention to whaling practices. His dedication to ocean conservation has made him a globally respected advocate for the environment.

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