Categories
SCUBA Diving

Merry Christmas

When I look back over my shoulder to peek at the year left behind, I feel a mixed bag of feeling. It has been exceedingly difficult. Challenging times require spirit, we all are fatigued at this point, but we can always reach inside for guidance. You may be lost at this point (within the pandemic), […]

Categories
CCR Scientific Research SCUBA Diving

Amazing what Charlie Roberson has accomplished

On Saturday, December 11, 2021, KUR divers Charlie Roberson and Andy Pitkin explored and surveyed 564 ft of new passage at the bottom of Mt. Doom. Originally explored in 2007, Mt. Doom was the deepest point in the cave at 407 ffw, until deeper sections were explored last season.

Categories
Ratio Deco SCUBA Diving

Ratio Deco- doing the numbers

Example of Ratio Deco for 45 meters set point. 2 Method discussed.
45- 1:1

Categories
Culture General Scuba posts Yoga and mobility

Problem reaching your valves and isolator on your twins/ doubles?

Do the following exercises to improve your movements and possible fix this issue. The world’s population is aging and becoming healthier; therefore, we see more elderly people doing more outdoor activities. Diving is no exception; much of the technical diving community has a middle-age demographic structure. Other factors that contribute to the age range in […]

Categories
History Interviews SCUBA Diving

John Clarke

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 […]

Categories
Equipment SCUBA Diving

An effortless way to add weight on my Sidemount rig

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 […]

Categories
CCR General Scuba posts SCUBA Diving

Rebreather Setting Leads to Dangerous Equipment Failure

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.

Categories
General Scuba posts

Joe Porter will be missed

“Wherever you fare till your eyries receive you at the journey’s end!”

Categories
Equipment SCUBA Diving

Balanced Rig and Neutral buoyancy

Exploratory view of balanced rig and neutral buoyancy.

Review of a real scuba diving accident.

Categories
Culture General Scuba posts History

Mermaids are real- culture

Ancient sailors claimed to witness in deep oceans creatures’ part-human and part-animal. Maps are strewn with strange creatures likes mermaids and mermen.

Categories
Archaeology Books Culture History Scientific Research SCUBA Diving

Diving Into History With Thailand’s Sira Ploymukda

During the last trip (wreck diving), Siwat Worachananant and Sira Ploymukda took a set of delightful photographs that I want to share with you.
Theme: archaeology

Categories
Culture Español Industria del buceo Interviews SCUBA Diving

Karlos Simón

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.

Categories
Español General Scuba posts SCUBA Diving

The Recreational Decompression Diving

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. […]

Categories
SCUBA Diving

Reparación de equipos de buceo

Taller de reparación de equipos, ubicados en Caracas.
Llena el formulario para contactarme.

Categories
Books Culture General Scuba posts History

Argonaut Kraken

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 […]

Categories
General Scuba posts Scientific Research

Mike Anghera, Diving Safety Officer

Mike Anghera Interview
The UCLA Scientific Diving Program provides training, logistics and support for faculty, staff and student reseachers at UCLA. All diving policies and procedures are based on the diving standards set forth by the UC Los Angeles Diving Control Board and the American Association of Underwater Scientists. All research diving projects and divers diving under the auspices of UCLA must be qualified and authorized according to the UCLA/AAUS Standards and abide with the current version of the UCLA Diving Safety Manual.

Categories
SCUBA Diving

O’Neil’s Surprise

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 […]

Categories
Applications/App SCUBA Diving

Tech Deco

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.

Categories
Interviews SCUBA Diving

An insightful conversation with Anna Kozlova.

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 […]

Categories
Foods

Starbursts, Jell-O, and 3,000+ Other Foods Contain This Dangerous Chemical, Study Finds | Eat This Not That

A new study from the European Food Safety Authority says titanium dioxide found in thousands of U.S. foods is no longer safe to consume. Source: Starbursts, Jell-O, and 3,000+ Other Foods Contain This Dangerous Chemical, Study Finds | Eat This Not That

Categories
Dive Computers SCUBA Diving

Cochran Undersea Technology inDepth Magazine

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 […]

Categories
General Scuba posts

The value of snorkeling with your kid

Sorkeling will develop in your child not only motor-skills but also will help in the cognitive process that will serve him in the future.

Categories
Books Decompression Theory Dive Computers General Scuba posts History Scientific Research SCUBA Diving Subscriber content

Students’ resources and tools

Library- Repository:
Documents, softwares, scientific publications, etc.

Categories
Culture

Where West meet East

Many concepts are the same between west and orient civilizations. Today I want to revise the concepts Chaos-Order and (tàijítú) Yin-Yang similarities. Both represents the deepest level of existences. Both philosophies are related to the dualism, for example light (day) and darkness (night).  Every part develops from each other. Thus, neither cannot exist without the […]

Categories
CCR General Scuba posts Interviews

Andy Fritz

His a bold and humble person. A Highly intelligent with a strategic thinking. No doubt that his actions inspire others to dream, learn more and become more… Feed RSS feed on the news letter Andy Fritz started modifying Russian military rebreathers back in 1997 initially for personal use, but soon enough divers would travel to Thailand to […]

Categories
CCR Oxygen sensors SCUBA Diving

Pelagian approach to Instant Cell Validation

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 […]

Categories
SCUBA Diving Yoga and mobility

Yoga props

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, […]

Categories
SCUBA Diving

Dive Computers

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 […]

Categories
History SCUBA Diving

George Bass

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.

Categories
History SCUBA Diving

Ascent Rate: 60ft./min.?

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 […]

Categories
Ratio Deco SCUBA Diving

Understanding Ratio Deco Air Tables

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 […]

Categories
Books Interviews SCUBA Diving

The Jason Parker Trilogy

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, […]

Categories
General Scuba posts SCUBA Diving Yoga and mobility

Joints Mobility

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 […]

Categories
General Scuba posts Interviews SCUBA Diving

Michael Menduno: The Journalist within

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 […]

Categories
General Scuba posts Interviews SCUBA Diving

Bill Stewart

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 […]

Categories
General Scuba posts Interviews SCUBA Diving

John B. Griffith Jr.

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 […]

Categories
Ratio Deco

Ratio Deco or deco on the fly

We’re going to review only some aspects of this system, because this is a merely introduction. So, knowing this, lets get into it. This system is based on a statistical approach to decompression schedule, this mean that you must used a set of standardized gases for a particular range of depth that were chosen for […]

Categories
Ciencia del buceo Español SCUBA Diving

El metabolismo es estúpido: un nuevo modelo sobre la formación de burbuja.

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”. […]

Categories
CCR SCUBA Diving

Poseidon Head made by Underwater Technologies

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 […]

Categories
SCUBA Diving

AV-Underwater Technologies-reseña

Ordenador de buceo AV Underwater Technologies. Reseña y Cabezal para poseidon MKVI

Categories
Ciencia del buceo Español

Oh Deco, oh Doppler, O’dive: Evaluando la primera herramienta de seguridad para “deco” conocida

Traducido por: Carlos Lander Título Original: Oh Deco, Oh Doppler, O’Dive: Assessing the World’s First Personal Deco Safety Tool- By Michael Menduno Traducido por: Carlos Lander Título Original: Oh Deco, Oh Doppler, O’Dive: Assessing the World’s First Personal Deco Safety Tool- By Michael Menduno Originalmente publicado por: InDepth en Julio de 2020 Disclaimer: Translations between languages […]

Categories
SCUBA Diving

How to replace a solenoid from your Poseidon eCCR

Discussion about solenoid replacement on the MKVI eCCR

Categories
SCUBA Diving

El nuevo orden impuesto

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. […]

Categories
Interviews

Bill Hamilton interview

Please take the time to review this wonderful article wrote by Joel Silverstein about Bill It’s safe to say that if it weren’t for Bill Hamilton, technical diving as we now know it would not exist. An underwater physiologist with deep roots in the commercial and scientific diving industries, in the late 1980’s he suddenly […]

Categories
Decompression Theory

The concepts behind bubbles mechanics and some ideas

This section is base on Dan Reinders presentation on The Varying Permeability Model which you can find free on our library or at Decompression.org Bubble is a body of gas within a liquid, does the pressure of a gas in a bubble is equal to the surrounding hydrostatic  pressure plus a contribution from surface tension. […]

Categories
Decompression Theory

Understanding nucleation as a process and what divers can do to mitigate it.

Divers have a generalized concept that decompression bubbles form with ascent and reduced its sizes with a decrease in ambient pressure but this isn’t completely accurate, tiny microbubbles are already present prior depressurization. Which means that two factors should be present for the occurrence of DCS, micronuclei and supersaturation. Although our internal body have no […]

Categories
SCUBA Diving

The brain behind FATHOM Dive Systems

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 […]

Categories
Decompression Theory

Ultrasound devices and DCS subclinical gas phase

Ultrasound devices make it possible to detect subclinical bubbles, the most common Doppler ultrasonic bubble detector. The use of this devices make possible to developed the concept of silent bubbles. It was demonstrated that decompression free of signs and symptoms   in both human and animals could actually produce a gas phase. This clearly shows that there […]

Categories
Decompression Theory

Multi model approach

Support information for Ratio Deco Decompression Procedures There’s a difference between a decompression model and a decompression strategy, one of the best proposition for it is what JP Imbert called a “multi model approach to decompression safety”, other interesting idea is “Ratio Deco.” Both are valid, very useful and base on the same principles; but […]

Categories
Español General Scuba posts Scientific Research

Vacante de presión parcial y el modelo metabólico estático- II parte

Vacante de presión parcial del oxígeno y el modelo metabólico estático- II parte

Categories
Español General Scuba posts Scientific Research

El metabolismo es estúpido: un nuevo modelo sobre la formación de burbuja.

05 Feb 2020 | Michael Menduno Traducción: Carlos Lander El artículo esta dividido en dos partes, sin embargo, el original no. 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 […]

Categories
Scientific Research SCUBA Diving

MK29 rebreather

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

Categories
Decompression Theory General Scuba posts Scientific Research

Inflammatory responses: Compartmental versus Ratio Deco.

Understanding the conclusion of a comparative evaluation of two decompression procedures for technical diving using inflammatory responses: Compartmental versus Ratio Deco.