Category: Decompression Theory

  • Amazing what Charlie Roberson has accomplished

    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.

  • Ratio Deco- doing the numbers

    Ratio Deco- doing the numbers

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

  • Diving Into History With Thailand’s Sira Ploymukda

    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

  • Mike Anghera, Diving Safety Officer

    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.

  • Resources and tools

    Resources and tools

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

  • Understanding Ratio Deco Air Tables

    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 […]

  • Ratio Deco or deco on the fly

    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 […]

  • The concepts behind bubbles mechanics and some ideas

    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. […]

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

    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 […]

  • Ultrasound devices and DCS subclinical gas phase

    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 […]

  • Multi model approach

    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 […]

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

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

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

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

    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 […]

  • MK29 rebreather

    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

  • Inflammatory responses: Compartmental versus Ratio Deco.

    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.