John R. Clarke, Ph.D. (born November 20, 1945) is an American scientist, private pilot, and author. He served as Scientific Director at the United States Navy Experimental Diving Unit (NEDU). Clarke is recognized as a leading authority on rebreather engineering. He has an extensive academic career in biological and physiological sciences. He is an excellent […]
Author: Carlos Lander, edited by: Bruce Konefe Normally when I travel, I prefer to use my “Dive Rite – TransPac” sidemount configuration, twin tanks are not always available. My sidemount configuration works great, however, I needed to find a better solution to mount the lead weights, to help perfect my buoyancy/ trim. With a small […]
that gear is used for. Servicing for regulators varies on the brand and type of equipment, so making sure the technician knows if it will be used on a close-circuit rebreather could have prevented an irregular pressure setting. It is always best before diving to double check your apparatus and check your line pressures to make sure they are compatible with your brand of equipment.
Exploratory view of balanced rig and neutral buoyancy.
Review of a real scuba diving accident.
Ancient sailors claimed to witness in deep oceans creatures’ part-human and part-animal. Maps are strewn with strange creatures likes mermaids and mermen.
During the last trip (wreck diving), Siwat Worachananant and Sira Ploymukda took a set of delightful photographs that I want to share with you.
El amigo de los tiburones! Conoce la vida de Karlos en la intimidad. En esta amena conversación Karlos revela su amor por los oceanos, su avidez por la aventura y, sus primeros pasos como camarógrafo.
SSI new diving program, 2021. Versión en español This year SSI comes with a new course: Decompression Diving. On my view; this course is aim to the recreational market. Is an effort for bringing safety to divers who tends to stay longer, deeper and generally made “deco” with their dive computer with a single cylinder. […]
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I came across this website: Vintage Double Hose and it’s fascinating what I learned about scuba vintage equipment. Actually, I still use my US Aquarius and Conshelf regulators and, believed me, I didn’t know those were considered vintage. The site was created by Bryan in 2004 and accoriding from what I read, he was frustrated […]
It was an afternoon routine when I compulsive checked my e-mail; one email captured my interest. I could not believe what I was reading. Someone was making me a gift, a Cochran EMC-20H Dive Computer. At first, I thought it was a joke, someone was jonking my jeter… but I decided to reply and see […]
This is a good program with a subtle set of variables and characteristics. It’s well suitable for an Open Circuit Diver to use on the field for last minutes review and run different profiles. What is lack is an alternative windows to run second or third dives in the same day.
Example of Ratio Deco for 45 meters set point. 2 Method discussed.
A videographer, an adventurer, and a storyteller. Anna is an enthusiastic, experienced diver and underwater videographer with a background in science and additional education in cinematography. Anna has nine years of diving experience, eight of them as technical diver and asunderwater videographer, and more than one thousand logged dives. She has a creative personality, has a natural […]
With Michael Menduno help I authored this article for GUE’s (Global Underwater Explorers) InDepth blog/magazine. It all has been a labor of love, and we hope you enjoy reading it as much as we enjoyed writing and editing it. As any other article some photographs are left out, not all of them can make it for one reason or another. Below are […]
Documents, softwares, scientific publications, etc.
The second function of the ADV is provide a simple means to verify the accuracy of the oxygen sensors during a dive. As mentioned in the Set up chapter, oxygen sensors are unreliable and your best defense is to check them frequently. Additionally, during the course of a dive, every time the ADV triggers the […]
Sustainable practice Sustainable means that you want to be able to continue doing yoga without injuries. More often than not, people get injured doing Yoga because they forgot to maintain a good posture foundation. Some people do more importance to breathing than how a posture (exercise) is performed. In reality; both are equally important; nonetheless, […]
A beginner guide What is underneath? Schematics of a Dive Computer Sensors/Clock → Storage Unit ↔ [Control Unit / Arithmetic and Logical Unit]CPU → Output [Display] A dive computer is a device that operated upon collected data, it is an electronic board which does arithmetic and logical operations accordingly with the programmed decompression algorithm and […]
Underwater archaeology pioneer George Bass dies at 88
In a storied career spanning decades, the archaeologist led excavations of ancient shipwrecks and inspired a generation of scientific adventurers.
Have you ever asked to your instructor how was calculated/ came-up-with the ascent rate of the tables or computer that you used? Do you think it reflects basic fact of human physiology? Well, the short answer is no. The selection was made by the USA NAVY based on a compromised between work and safety. At […]
Before viewing the numbers, first let’s review a few concepts: “ascent strategy” and “overall procedure”. The strategy is the result of a combination of theory and practicality. The procedure accounts for Rock Bottom gas management for safety reason. The overall procedure is consistence and compatible with all levels of training and depth. So divers applied […]
When saving the world is not enough. This part is focus on the intriguing side of being able to write a series, on evolution, on aliens, deep waters, low oxygen environments, life and more… podcast feed Series Middle Waters “A techno science fiction thriller that is grounded in what we know of our physical world, […]
Why nobody teaches mobility in scuba? As divers we use a lot of equipment and, swim large distances underwater, plus need to handle situations like maneuvering the manifold, valves, cameras, etc. People tend to think that what they needs is a lot of muscles, but generally divers forgot about mobility. Joint Mobility refers to as […]
Michael is a wild- Mustang. He has a resilient attitude and the curiosity of a child. Scientist and journalist never grew up in their curiosity 1, these kinds of characters maintain ignited the flame in their eyes. When you talk to Michael, you can perceive it. Michael has an inquisitive mind, like to explore, investigate, and […]
Bill is an enhancer; he understands what needs to be done in the current state of the underwater-world. His love for the Philippines and for the western Pacific Ocean is well known. His passion for photography pushes him to travel the world, not only as an explorer of the underwater world, but also as an explorer […]
A Conversation with a Veteran and a Wiseman It’s difficult to describe John, he is the embodiment of a hero, at the same time a Wiseman and a gentleman. He is veteran, writer and author. He travel the world engagement different cultures and absorbing them. He is an enthusiastic person with a lot to share… please enjoy. Click […]
05 Feb 2020 | Michael Menduno Traducción: Carlos Lander La existencia y cantidad de burbujas a nivel vascular esta asociada al síndrome de descompresión o embolia gaseosa (EG). Se teoriza que durante la inmersión, las burbujas se desarrollan a partir de pequeños núcleos ya presentes en las cavidades porosas de los tejidos, comúnmente denominado “micronúcleo”. […]
The Configuration of the head has the possibility to use up to three oxygen cells, two independent power supply sources (battery type: LiPo 18650) and a low-power solenoid Clippard. A discussion about solenoids and Kiss valve: A Kiss valve needs at least between 12-13 bar of pressure to works correctly, Clippart works with a very […]
Ordenador de buceo AV Underwater Technologies. Reseña y Cabezal para poseidon MKVI
Discussion about solenoid replacement on the MKVI eCCR
Publicado originalmente el día 18 de Mayo de 2020 COVID-19 Más allá si el virus es natural y trasmitido al ser humano desde un pangolín o, se escapó de un laboratorio en Wuhan o fue creado y esparcido a propósito como parte de una guerra económica, son interrogantes que están latentes en la imagen colectiva. […]
Charlie Roberson FATHOM Dive Systems is a manufacturing company that focuses on life-support equipment for underwater exploration. Charlie is the brainchild of FATHOM, a cave diver and explorer, who sought to make products for his own exploration. The company’s goal is to produce innovative, functional, and reliable equipment for underwater exploration. Link to the Podcast […]
Recently I spoke with John Clarke, on our conversation he mentioned that the NAVY is working on a CCR that could be used with umbilical as a backup; so if you still pondering about it, below are public-videos explaining the concept