Category: Knowledgebase


technical-diving-formulas

Technical Diving Formulas The scanned page below highlights key formulas for technical diving.  This is useful as a review, or for technical diving students preparing for courses.

technical diving optimal gas mixes

Technical Diving – Optimal Gas Mixes Knowledge of optimal gas mix selection is critical to the technical diver.  The graph below simply correlates bottom depth against a desired END, and is consistent  with the tech community standard of 1.4PP02 for the working phase of the dive. The chart does not substitute for accurate technical dive [...]

Technical Diving Theory Sidemount Diving

Gradient Factors for Dummies By Kevin Watts (Article from RebreatherWorld.Com) This article attempts to provide a user’s view of gradient factors, an Erik Baker derived method of calculating decompression schedules. The title is not meant to be derisive, but simply an indicator that this article is meant to be a primer. Back to Buhlmann Everything [...]

ccr rebreather safety advice

CCR / Rebreather Safety Resources A collection of online resources relating to the topic of CCR / Rebreather Safety. CCR Aware Video: Safety Advice for New and Prospective Rebreather Divers Improving Rebreather Safety: First in a series of reports on Rebreather Forum 3, by Michael Menduno. Why so many deaths? What’s the real story behind 18 [...]

DIY sidemount technical wreck diving philippines

Adding Weight to a Sidemount Diving Harness This is a very simple, quick and cost-effective for adding weight to a sidemount diving harness.  It’s a technique I now use when initially working with students to add/remove weights in-water, during initial set-up and configuration dives.   It also has an application for travelling sidemount divers, who [...]

Technical Sidemount Diving

 The following commentary was first published as a post on the Scubaboard internet discussion forum. I felt that it provided a very beneficial perspective on the positive and negative aspects of sidemount configuration; particularly in comparison with back-mounted alternatives.  It’s a useful read for those divers, of all levels and backgrounds, who are considering their [...]

advanced wreck diving philippines

Relocating a Lost Guideline – Skills for Wreck Divers Technical Diving knowledge share by Andy Davis This article, by Jim Wyatt, was originally published in Underwater Spelology.  I have reproduced the article here, as the issue of relocating a lost guideline also demands the attention of wreck divers at all levels. In the event of a [...]

wreck diving course philippines

Line Laying for Wreck Diving Penetrations – Video Tutorials Wreck diving courses include line laying practice for wreck diving penetration, however many wreck instructors have minimal personal experience in the finer points of guideline deployment and use.  Proper guideline techniques were refined and perfected in the discipline of cave diving exploration. Those techniques were adopted [...]

ccr megalodon rebreather philippines

CCR Megalodon Rebreather – Preparation Videos Technical Diving knowledge share by Andy Davis   An excellent series of six instructional videos produced by Andreas W. Matthes of  ProTecPlaya for CCRMegalodon.com, showing critical preparation steps for diving the Megalodon CCR. Interested in training on the Megalodon CCR in the Philippines or Thailand?   Check out the page [...]

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Sidemount Technical Diving Techniques – Videos Some great videos that demonstrate technical sidemount diving techniques, as taught on courses, by Rob Steiner. Sidemount Buoyancy Practice Flutter Kick On Sidemount Frog Kick on Sidemount Helicopter Turn on Sidemount Sidemount Trim Cylinder ‘Feathering’ (manipulate valve to breath from free-flowing regulator) Partial Removal of One Cylinder Partial Removal [...]

evolution of sidemount diving subic bay

The Evolution of Sidemount Diving Continues. By Jeff Loflin For those of you who are unfamiliar with the sidemount gear configuration, it is simply moving your backmounted gas cylinders to the side of your body. The basic safety advantages of having your cylinders mounted on the side is that all of the gauges, hoses and leak points are always in the [...]

technical diving subic bay philipines

An abridged version of this deep stops article was originally in DeepTech, 5:64; and the full version subsequently published in Cave Diving Group Newsletter, 121:2-5. The Importance of Deep Stops: Rethinking Ascent Patterns From Decompression Dives by Richard L. Pyle Before I begin, let’s make something perfectly clear: I am a fish-nerd (i.e., an ichthyologist). [...]

Silt Out – Wreck Danger! This video, filmed by myself in Subic Bay, graphically shows the danger of silt out to wreck divers conducting penetration dives.   What looks like a nice safe and benign compartment, with plenty of light and an obvious exit (well within recreational wreck diving limits) turns into a potential death [...]

decompression theory technical diving

Decompression Theory – Links and Resources Here is my selection of educational articles and resources for further reading on scuba diving decompression theory… -  Bubble Decompression Strategies by Eric Maiken -  VPM Decompression Site by Eric Maiken -  Confessions of a Mortal Diver by Richard Pyle -  The Importance of Deep Stops by Richard Pyle -  Half-Times Explained by Mark Powell -  Deco Lessons by Erik Baker (pdf) [...]

Luxfer-imperial-cylinder-sp

Scuba Cylinder Specifications for Buoyancy and Weighting Calculations When scuba divers calculate their buoyancy with an aluminum cylinder,  it is essential for them to know the relative buoyancy characteristics of their chosen cylinder – at full pressure capacity and also at their minimum reserve (500psi). The following tables provide buoyancy information on the common Luxfer [...]

technical diving subic bay philipines

Confessions of a Mortal Diver – Learning the Hard Way (Decompression Sickness, Treatment and Recovery) by Richard L. Pyle (deepreef@bishop.bishop.hawaii.org) ScubaTechPhilippines note:  I’ve posted this article as it represents a serious lesson and learning text for technical divers.  It was originally posted via a washington.edu website, but sadly that location hasn’t remained online. The true story, [...]

technical diving subic bay philipines

Scuba Diving Knowledge Resources  I hope you enjoy my comprehensive list of the best ‘how to’ scuba diving resources, knowledge articles and tips on the web.  If you have any suggestions, please feel welcome to contact me for addition. -   Gas Management for Scuba Divers –   CRR / Rebreather Safety Resources: Articles/Links -   Rock Bottom Gas [...]

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Wreck Diving – Guidelines Technique Tutorial Videos These two videos from Mark Blackwood provide a good insight into effective guideline techniques for guideline laying in wrecks. More details of guideline techniques for wreck diving can be found in my Advanced Wreck Diving techniques supplement.  For details about my specialist wreck diving courses, please see: PADI [...]

Sidemount Technical Wreck Diving Subic Bay Philippines

Core Overhead Environment Diving Skills A collection of video tutorials from the web –  depicting key skills for overhead environment diving in wrecks and caves. For information only. Please get properly trained before attempting to enter shipwrecks! I will update this blog entry with more videos and features as I find them… if you have [...]

Sidemount Technical Wreck Diving Subic Bay Philippines

Calculating ‘No Stop Time’ by Erik C. Baker, P.E. The following is an explanation about calculating the “No Stop Time”: Starting out with the basic Haldane equation (keep in mind that this equation is for a CONSTANT DEPTH profile, not for ascents or descents): P = Po + (Pi – Po)(1 – e^-kt) which states that P, the [...]

Sidemount Technical Wreck Diving Subic Bay Philippines

TecRec Technical Diving Log Book Page Insert Click on the link below to open a PDF copy of the TecRec log-book insert.  Save and print… hey presto!…. you can now log your technical dives! TecRec Technical Diving Log Book Insert

Sidemount Technical Wreck Diving Subic Bay Philippines

Tech Diving – Turn Pressure Calculator Use this spreadsheet to help calculate your turn pressure on technical/overhead dives: turn_pressure_calculator

Sidemount Technical Wreck Diving Subic Bay Philippines

Decompression Gases – Efficiency Ratios Deco Gas Efficiency Ratio Air 1:1 32% 1:1.6 36% 1:1.21 40% 1:1.26 50% 1:1.32 80% 1:1.36 100% 1:1.40 Theoretical efficiency ratios for decompression gas options.

Sidemount Technical Wreck Diving Subic Bay Philippines

ANDI Ascent & Descent Procedures – Open Circuit Diving During all ANDI training courses, students are taught to follow a set system of procedures for ascent and descent.  These procedures include a number of stops, to enable team cohesion, increase safety and conservative off-gassing. You don’t need to be an ANDI trained diver to appreciate [...]

Sidemount Technical Wreck Diving Subic Bay Philippines

Scuba Diving First Aid – Marine Life Injuries This is an excellent first-aid resource for scuba divers.  It’s so nice to see some detailed information available on the internet for the benefit of divers.  The article deals with a wide range of common, and less common, marine life injuries that are risks to scuba divers. [...]

Sidemount Technical Wreck Diving Subic Bay Philippines

Under The Influence: A Performance Guide To Managing Narcosis By Barry Fowler, Ph.D.* This paper was originally prepared for habitat divers using nitrogen-oxygen mixes, where narcosis becomes a key limiting factor to performance. – Ed. Breathing hyperbaric air causes a syndrome of behavioral and subjective effects called nitrogen narcosis, which limits the work efficiency of divers and [...]

Sidemount Technical Wreck Diving Subic Bay Philippines

The Physics of Diving – Scuba Gas Laws A concise explanation of the critical scuba gas laws for divers by Andy Davis PADI TecRec, ANDI, BSAC and SSI Instructor Scuba diving is all about getting gas into your body while you are underwater. What complicates scuba diving is the way gasses behaves at depth, under [...]

Sidemount Technical Wreck Diving Subic Bay Philippines

OXYGEN EXPOSURE MANAGEMENT by Richard D. Vann Oxygen metabolism is the primary energy source in higher life forms, but when oxygen enters the metabolic process prematurely, reactive oxygen species can form which interfere with normal function and cause convulsions or other symptoms of oxygen toxicity. Immersion, exercise, and inspired carbon dioxide increase susceptibility to oxygen [...]

Sidemount Technical Wreck Diving Subic Bay Philippines

DECOMPRESSION SOFTWARE FOR TECHNICAL DIVING Technical diving courses are typically taught using laptop decompression software.  These permit the technical diver to develop a unique and specific dive plan, plus contingencies, for the actual dives they will carry out.  The ‘schedule’ for that plan will typically be printed, or transcribed, onto slates, wetnotes or laminated paper [...]