Wreck Diving Restrictions – Defining & Grading Restriction Severity

An interesting approach of wreck diving penetration restrictions by Andy Davis – Scuba Tech Philippines.


Staying Connected – A Beginner’s Guide to Lines in Cave Diving

An interesting short overview of some important tools used for overhead penetrations (caves, mines, wrecks):

Cave navigation…

Wreck diving & cave diving are sharing some similarities in safety procedures, protocols and operations. Some of them are related to using of directional & non-directional markers, jumps, lines, spools…

The following material “Zen and the Art of Mexican Cave Navigation“published in GUE‘s blog InDEPTH is a very good reference to analyze, learn and apply in any overhead environment.

Dive Safe!


Diving etiquette – Boats and zodiacs

Following the previous series of “diving etiquette” – Diving Etiquette: Wreck Diving Etiquette & other matters and Diving Etiquette: The Marine Environment, today is time to present you the interesting material from AlertDiver – Divers Alert NetworkDiving etiquette – Boats and zodiacs.

Dive Safe!


Cutting diving tools in overhead environment – wrecks

The diver’s cutting device is mentioned as “auxiliary accessory” during the sport diving (training) levels. The SCUBA diving marketing is offering us a wide options of tools of various sizes and shapes, made of steel or titanium

Sport Divers tend to attach the cutting device (knife, eezycut, scissors etc) in various places (BCD, body – arms or legs), based on their personal preferences and activity performed.

As Technical Diver, you are performing a different kind of diving, including using of mixed gases & deco obligations or in an overhead environment. Or any combination. And as part of your extended planning, risk assessment should be on your dive preparation planning list. And cutting devices are part of your equipment, by default. Good quality tools!

Halcyon Explorer

When performing a dive inside of a wreck (overhead environment: caves, mines, wrecks), or around a wreck, your cutting device plays a very important role in your safety. Lost or handing cables, ropes, fishing lines or fishing nets, even carpets or pieces of furniture may represent a great danger underwater. And even greater when you are obliged to perform a deco stage or you have no clear “physical ceiling” (in an overhead) and you get entangled. And the time is counting down faster! While on the dry land you can easily rich your diving tool in almost any position, no matter where your knife of eezycut tool is placed, underwater is totally a different story.

You’ll be bulky, even in sidemount, sometimes in tight space and therefore, reaching your cutting tool must be easy and with minimum physical and mental stress.


You must be able to access your cutting tools (knife, eezycut, scissor) with both hands. No leg mounted or Rambo style.


Where to secure the cutting tools?

Webbing mounting (in the chest area and/or on the harness belt) where is easy accessible for both hands. Preferable, one device “knife” – small/medium size, and one device Eezycut.

If Eezycut is preferred attached on the wrist/forearm or dive computer straps/bungee cords, use (if possible) one tool for each hand.

Scissor can be stored in the leg pocket.

GUE DIR style

Try and follow the KISS principles: Keep It Stupid Simple!

Stay safe & Have fun dives!


SDI/TDI 5*Dive Center

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