Nitrox, Heliair, and Trimix Gas Blending Charts
40 Fathom Grotto
Text by Curt Bowen (except from ADM issue 29)
Just fifteen minutes outside of Ocala, the Grotto is conveniently located in central Florida amidst rolling hills covered with ancient, picturesque oak trees. Joining me on the photo session was a good friend of mine, Eric Osking, and Warren Stincer, one of ADM’s dive assistants.
Artifact Preservation
Text by Andrew White (except from ADM issue 4)

Iron artifacts removed from sea water should be immediately placed in a fresh water solution. If allowed to dry, the concretions surrounding the object become very hard and cling to the artifact with much more intensity. Regular tap water works for storage, but rain water and distilled water have a higher ph level that allows them to inhibit corrosion much more efficiently.

Continuous Nitrox - Trimix Gas Blending
Text by Bart Bjorkman (except from ADM issue 8)
Just think, now a diver can explore that deep wreck with a totally clear head. While this is exciting, it is important to remember not to dive mixed gas without the proper training. Decompression requirements and equipment configuration, among other things, are quite different from diving air.
EUROTEK.2010 - ‘the bi-annual Advanced and Technical Diving Conference’ - was held on Saturday 16th and Sunday 17th October 2010 at the International Convention Centre, Birmingham, England.
Fossil Diving on the Cooper River with Capt. Tom McMillan
Text and Photography by Curt Bowen
On my search all signs pointed to veteran shark tooth hunter and boat Captain Tom McMillan. Captain Tom has been searching these rivers for over 25 years and knows them better then the back of his own hand.
Text by Curt Bowen
Heliair, a term originally coined by Sheck Exley, is the simple process of adding helium to a scuba cylinder then topping it off with air. Heliair, sometimes called "poor man's mix" was implemented in the early deep air days of cave exploration for the reduction of nitrogen narcosis.
In Search of Prehistoric Relics
Text by Andreas Kerner
Florida’s numerous rivers, lakes, and creeks contain a wealth of fossils, dating back to more than 40 million years. Technically speaking, the term “fossil” covers any remains of organic life, from bones and teeth of vertebrates to shells, sea urchins, and fossil plants.
Oxygen Clean - Is a Myth
Text by Bart Bjorkman
Oxygen itself does not burn, but it does enhance combustion. All experts agree that in a high-pressure system containing elevated concentrations of oxygen, a standard of cleanliness called "oxygen clean" is required. Why then is it not possible
METHOX - New technology or just wasted gas...
Text by ADM Staff
“I’ll tell you what,” Beauregard said, “The air comin outta that thing smelled like a Tijuanna outhouse, but we used it anyway. And I’ll tell you what, that day I made it to 350 feet.”
Sheck Exley • Remembering a Legend
Text by Jim Bowden
In this egomaniacal discipline of cave diving, it was refreshing to see a man accomplishing the impossible without the fanfare and entourage that we so often see in much lesser endeavors. Perhaps the bond we formed as dive partners was because so much of our diving history had been solo.
Technology and Guts
Text by Bart Bjorkman
Imagine using diving equipment so different from known technology that it is truly radical. Yet technology was only a part of the picture; the other, perhaps more important aspect was "guts". The divers involved exhibited almost unbelievable courage in an escapade that would humble even the best cave divers today.
Text by Idee Belau
With a seemingly tangled configuration of hoses and with tanks affixed to areas of the body that new divers might never imagine, technical divers are able to undertake ambitious dive profiles taking them to deeper wreck sites, farther into cave systems, and to longer bottom-times.