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Category: Wreck Diving Articles


scubatechphilippines-sidemount-technical-wreck-subic bay

 Explaining the Technical Wreck Course – Approaches To Advanced Wreck Diving by Andy Davis A technical wreck (sometimes called ‘advanced wreck’) course is a pinnacle-level diving course for highly qualified technical divers who wish to penetrate extensively inside of shipwrecks.   Whilst the primary skills and drills taught in these courses are identical wherever they are […]

Sidemount Technical Wreck Diving Subic Bay Philippines

Pony Cylinders and Redundant Air Sources for Wreck Diving by Andy Davis Recreational wreck divers often question whether they need to carry a redundant source of air when conducting specialist wreck diving activities.  Most agencies and instructors will generally recommend the use of redundant air sources to be a prudent measure for wreck divers.  However, […]

sheck exley

Sheck Exley’s Razor – The Nature of Limits By R.D. Milhollin (Blog editor’s note: This article was first published in the March-April 1995, issue of Underwater Speleology. I have added it here on my blog to preserve and disseminate further, what I believe to be beneficial insights into overhead and technical diving knowledge). Sheck Exley was one […]

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A Technical Wreck Instructor’s Tips – Best Wreck Diving Equipment By Andy Davis As a passionate wreck exploration diver with more than 25 years experience, I often get asked equipment advice by recreational and technical wreck diving students. Over many years, I have found a few ‘favourite items’ that I now use all the time […]

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How To Evaluate A Wreck Diving Course by Andy Davis In this article, I will be looking at what differentiates basic wreck diving courses – the good, the bad and the ugly. In particular, I want to examine specific wreck penetration issues, so that the reader may find some guidance in their selection of a […]

technical wreck diving tips

Top Ten Wreck Diving Tips For Safer Wreck Penetration Dives By Andy Davis I’ve been diving on – and inside – shipwrecks for more than two decades, on 4 continents.  I specialize in teaching the highest level wreck diving courses as my full-time job.  I will happily state that my attitude towards wreck penetration has […]

Technical Wreck – Passing Tight Restrictions In Sidemount A short video clip taken from my current sidemount technical wreck class  (Jan 2016). The student is passing his first serious restriction whilst line-laying inside the USS Majaba (El Capitan) wreck in Subic Bay. Passing restrictions, even in sidemount, might look easy (if scary!), but there are […]

technical wreck penetration training course

Technical Wreck Penetration – A Question Of Experience by Andy Davis I often get asked how many dives should a technical wreck diver have before they undertake serious wreck penetration dives at depth. It’s  hard to answer, because it is a very individual question; which deserves more than a simple numerical answer. I can dive […]

Advanced Sidemount Wreck Restrictions

Advanced Sidemount Wreck Diving: Passing Extreme Restrictions  Advanced sidemount diving techniques present a vast spectrum of new opportunities for wreck divers to safely explore previously unpenetrable sections of shipwrecks. The training for these activities is typically only available to fully qualified technical wreck (and/or full cave) sidemount divers. This reflects the high challenge involved with […]

technical wreck course, subic bay, philippines

Technical Wreck Course Video Subic Bay, Philippines 2013  In September 2013, I managed to get some good footage from an ANDI Technical Wreck course, run in Subic Bay.  The course took place over 5 days and was 6 dives (although we did some extra too!).   My student, Alex (Zen Diver) had previously completed technical […]

Defining Wreck Diving Restrictions by Andy Davis Very few diving agencies go into detail about wreck diving restrictions. Those that do, tend to limit their definition to either ‘not restricted’ or ‘restricted’. That definition hinges upon whether two divers could pass through simultaneously when sharing gas.  The intention of this is to prevent recreational divers […]

DIY Sidemount Wreck Diving Helmet

DIY Sidemount Wreck Diving Helmet by Andy Davis I noticed, with some surprise, the high cost of cave sidemount wreck diving helmets currently being sold on the scuba market. Light Monkey sells an excellent diving helmet, but the cost (certainly here in the Philippines) was prohibitive for me.  I promote a policy of frugal investment on rugged […]

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 […]

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 […]

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 […]

advanced wreck diving course subic bay

ADVANCED WRECK DIVING – COURSE NOTES by Andy Davis, PADI / ANDI Technical Wreck Instructor Disclaimer:   These notes accompany a professionally supervised advanced wreck diving workshop, aimed at developing specialist skills for qualified wreck divers.  This information is not a substitute for gaining proper experience under qualified direction.  Wreck penetration is a very hazardous […]