Backup Lights - by George Irvine
Buddy Inspiration or Expiration - by George Irvine
Decompression and the CNS Oxygen Clock - by George Irvine
Decompression Procedures - by George Irvine
DIR Separation Protocol - by George Irvine
Diving to 18 grand part 1 - by George Irvine
Diving to 18 grand part 2- by George Irvine
Doing It Right Gear Configuration - by George Irvine
Explanation of the Oxygen Window - by George Irvine
Gas Mixing and Bottle Marking - by George Irvine
Minimum Deco - by George Irvine
More on Minimum Deco - by George Irvine
My 77th Cave Dive - by George Irvine
Position of knife in DIR config - by George Irvine
Repetitive Diving 1 - by George Irvine
Repetitive Diving 2 - by George Irvine
The Bakers Dozen - 13 reasons why we do not use 80/20 - by George Irvine
What is a Stroke - by George Irvine
Why the WKPP and G.U.E. do bottle marking the way they do - by George Irvine
Why we do not bounce dive after diving in the WKPP - by George Irvine
Simple Explanation of the Oxygen Window - by George Irvine
The Decompression Curve - by George Irvine
The First Stop, The Deep Stops - by George Irvine
TomTom GPS Coördinaten Frankrijk - by Penetrators.nl
TomTom to Sygic Conversion Tool
Knotting Guideline for Cave Diving Exploration
What is GUE - GUE dive training
WKPP: Chip's Hole Exploration, 1996-2006
WKPP: Wakulla Springs exploration dive, 22 April 2007
WKPP: Turner Sink-Wakulla-Spring Creek Dye Trace
WKPP: Cave Diving: Cheryl Sink to Emerald Sink Traverse
Movie: Penetrators in Mexico 2008 [Teaser]